diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 152005a..58aa2a9 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -8,7 +8,8 @@
       "WebFetch(domain:primevue.org)",
       "WebFetch(domain:core.telegram.org)",
       "WebFetch(domain:docs.telegram-mini-apps.com)",
-      "Bash(ls:*)"
+      "Bash(ls:*)",
+      "Bash(find:*)"
     ]
   }
 }
diff --git a/backend/alembic/versions/4c6a3c01542f_add_coaching_tables_and_rider_coaching_.py b/backend/alembic/versions/4c6a3c01542f_add_coaching_tables_and_rider_coaching_.py
new file mode 100644
index 0000000..09e9501
--- /dev/null
+++ b/backend/alembic/versions/4c6a3c01542f_add_coaching_tables_and_rider_coaching_.py
@@ -0,0 +1,51 @@
+"""add coaching tables and rider coaching fields
+
+Revision ID: 4c6a3c01542f
+Revises: 928b78044640
+Create Date: 2026-03-16 14:26:46.753457
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = '4c6a3c01542f'
+down_revision: Union[str, None] = '928b78044640'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('coaching_chats',
+    sa.Column('id', sa.UUID(), nullable=False),
+    sa.Column('rider_id', sa.UUID(), nullable=False),
+    sa.Column('chat_type', sa.String(length=50), nullable=False),
+    sa.Column('messages_json', postgresql.JSONB(astext_type=sa.Text()), nullable=False),
+    sa.Column('status', sa.String(length=20), nullable=False),
+    sa.Column('context_snapshot', postgresql.JSONB(astext_type=sa.Text()), nullable=True),
+    sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False),
+    sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False),
+    sa.ForeignKeyConstraint(['rider_id'], ['riders.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.add_column('riders', sa.Column('coaching_profile', postgresql.JSONB(astext_type=sa.Text()), nullable=True))
+    op.add_column('riders', sa.Column('onboarding_completed', sa.Boolean(), server_default=sa.text('false'), nullable=False))
+    op.add_column('training_plans', sa.Column('status', sa.String(length=20), server_default=sa.text("'active'"), nullable=False))
+    op.add_column('training_plans', sa.Column('onboarding_data', postgresql.JSONB(astext_type=sa.Text()), nullable=True))
+    op.add_column('training_plans', sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('training_plans', 'updated_at')
+    op.drop_column('training_plans', 'onboarding_data')
+    op.drop_column('training_plans', 'status')
+    op.drop_column('riders', 'onboarding_completed')
+    op.drop_column('riders', 'coaching_profile')
+    op.drop_table('coaching_chats')
+    # ### end Alembic commands ###
diff --git a/backend/app/api/activities.py b/backend/app/api/activities.py
index 03eacf1..109a8e0 100644
--- a/backend/app/api/activities.py
+++ b/backend/app/api/activities.py
@@ -5,24 +5,34 @@ from fastapi import APIRouter, Depends, UploadFile, File, HTTPException
 from sqlalchemy import select, func
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from backend.app.core.auth import get_current_rider
 from backend.app.core.config import settings
 from backend.app.core.database import get_session
-from backend.app.models.activity import Activity, DataPoint
+from backend.app.models.activity import Activity, ActivityMetrics, DataPoint, Interval
+from backend.app.models.fitness import PowerCurve
+from backend.app.models.rider import Rider
 from backend.app.schemas.activity import (
     ActivityResponse,
     ActivityListResponse,
     DataPointResponse,
+    ZonesResponse,
+    PowerCurveResponse,
 )
+from backend.app.models.fitness import DiaryEntry
 from backend.app.services.fit_parser import parse_fit_file
 from backend.app.services.metrics import calculate_metrics
+from backend.app.services.zones import calculate_power_zones, calculate_hr_zones
+from backend.app.services.power_curve import calculate_power_curve
+from backend.app.services.intervals import detect_intervals
+from backend.app.services.ai_summary import generate_summary
 
 router = APIRouter()
 
 
 @router.post("/upload", response_model=ActivityResponse)
 async def upload_activity(
-    rider_id: uuid.UUID,
     file: UploadFile = File(...),
+    rider: Rider = Depends(get_current_rider),
     session: AsyncSession = Depends(get_session),
 ):
     if not file.filename or not file.filename.lower().endswith(".fit"):
@@ -37,18 +47,33 @@ async def upload_activity(
     content = await file.read()
     file_path.write_bytes(content)
 
-    activity, data_points = parse_fit_file(content, rider_id, str(file_path))
+    # 1. Parse FIT
+    activity, data_points = parse_fit_file(content, rider.id, str(file_path))
     session.add(activity)
     await session.flush()
 
+    # 2. Save data points
     for dp in data_points:
         dp.activity_id = activity.id
     session.add_all(data_points)
 
-    metrics = calculate_metrics(data_points, activity, rider_id, session)
+    # 3. Calculate & save metrics (with FTP if available)
+    metrics = calculate_metrics(data_points, activity, ftp=rider.ftp)
     if metrics:
         session.add(metrics)
 
+    # 4. Detect & save intervals
+    intervals = detect_intervals(data_points, ftp=rider.ftp)
+    for interval in intervals:
+        interval.activity_id = activity.id
+    session.add_all(intervals)
+
+    # 5. Calculate & save power curve
+    curve_data = calculate_power_curve(data_points)
+    if curve_data:
+        pc = PowerCurve(activity_id=activity.id, curve_data=curve_data)
+        session.add(pc)
+
     await session.commit()
     await session.refresh(activity)
     return activity
@@ -56,17 +81,17 @@ async def upload_activity(
 
 @router.get("", response_model=ActivityListResponse)
 async def list_activities(
-    rider_id: uuid.UUID,
     limit: int = 20,
     offset: int = 0,
+    rider: Rider = Depends(get_current_rider),
     session: AsyncSession = Depends(get_session),
 ):
-    count_query = select(func.count(Activity.id)).where(Activity.rider_id == rider_id)
+    count_query = select(func.count(Activity.id)).where(Activity.rider_id == rider.id)
     total = (await session.execute(count_query)).scalar() or 0
 
     query = (
         select(Activity)
-        .where(Activity.rider_id == rider_id)
+        .where(Activity.rider_id == rider.id)
         .order_by(Activity.date.desc())
         .limit(limit)
         .offset(offset)
@@ -80,10 +105,11 @@ async def list_activities(
 @router.get("/{activity_id}", response_model=ActivityResponse)
 async def get_activity(
     activity_id: uuid.UUID,
+    rider: Rider = Depends(get_current_rider),
     session: AsyncSession = Depends(get_session),
 ):
     activity = await session.get(Activity, activity_id)
-    if not activity:
+    if not activity or activity.rider_id != rider.id:
         raise HTTPException(status_code=404, detail="Activity not found")
     return activity
 
@@ -91,8 +117,14 @@ async def get_activity(
 @router.get("/{activity_id}/stream", response_model=list[DataPointResponse])
 async def get_activity_stream(
     activity_id: uuid.UUID,
+    rider: Rider = Depends(get_current_rider),
     session: AsyncSession = Depends(get_session),
 ):
+    # Verify ownership
+    activity = await session.get(Activity, activity_id)
+    if not activity or activity.rider_id != rider.id:
+        raise HTTPException(status_code=404, detail="Activity not found")
+
     query = (
         select(DataPoint)
         .where(DataPoint.activity_id == activity_id)
@@ -100,3 +132,173 @@ async def get_activity_stream(
     )
     result = await session.execute(query)
     return result.scalars().all()
+
+
+@router.get("/{activity_id}/zones", response_model=ZonesResponse)
+async def get_activity_zones(
+    activity_id: uuid.UUID,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    activity = await session.get(Activity, activity_id)
+    if not activity or activity.rider_id != rider.id:
+        raise HTTPException(status_code=404, detail="Activity not found")
+
+    query = (
+        select(DataPoint)
+        .where(DataPoint.activity_id == activity_id)
+        .order_by(DataPoint.timestamp)
+    )
+    result = await session.execute(query)
+    data_points = list(result.scalars().all())
+
+    power_zones = []
+    hr_zones = []
+
+    if rider.ftp:
+        power_zones = calculate_power_zones(data_points, rider.ftp)
+    if rider.lthr:
+        hr_zones = calculate_hr_zones(data_points, rider.lthr)
+
+    return ZonesResponse(power_zones=power_zones, hr_zones=hr_zones)
+
+
+@router.get("/{activity_id}/power-curve", response_model=PowerCurveResponse)
+async def get_activity_power_curve(
+    activity_id: uuid.UUID,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    activity = await session.get(Activity, activity_id)
+    if not activity or activity.rider_id != rider.id:
+        raise HTTPException(status_code=404, detail="Activity not found")
+
+    # Try cached
+    query = select(PowerCurve).where(PowerCurve.activity_id == activity_id)
+    result = await session.execute(query)
+    pc = result.scalar_one_or_none()
+
+    if pc:
+        return PowerCurveResponse(curve=pc.curve_data)
+
+    # Calculate on the fly
+    dp_query = (
+        select(DataPoint)
+        .where(DataPoint.activity_id == activity_id)
+        .order_by(DataPoint.timestamp)
+    )
+    dp_result = await session.execute(dp_query)
+    data_points = list(dp_result.scalars().all())
+    curve = calculate_power_curve(data_points)
+
+    return PowerCurveResponse(curve=curve)
+
+
+@router.post("/{activity_id}/ai-summary")
+async def generate_ai_summary(
+    activity_id: uuid.UUID,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    activity = await session.get(Activity, activity_id)
+    if not activity or activity.rider_id != rider.id:
+        raise HTTPException(status_code=404, detail="Activity not found")
+
+    # Check for existing diary entry with summary
+    query = select(DiaryEntry).where(DiaryEntry.activity_id == activity_id)
+    result = await session.execute(query)
+    diary = result.scalar_one_or_none()
+
+    if diary and diary.ai_summary:
+        return {"summary": diary.ai_summary}
+
+    # Generate new summary
+    summary = await generate_summary(activity, rider_ftp=rider.ftp)
+
+    if diary:
+        diary.ai_summary = summary
+    else:
+        diary = DiaryEntry(activity_id=activity_id, ai_summary=summary)
+        session.add(diary)
+
+    await session.commit()
+    return {"summary": summary}
+
+
+@router.delete("/{activity_id}")
+async def delete_activity(
+    activity_id: uuid.UUID,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    activity = await session.get(Activity, activity_id)
+    if not activity or activity.rider_id != rider.id:
+        raise HTTPException(status_code=404, detail="Activity not found")
+
+    # Delete related records
+    for model in [DataPoint, Interval, ActivityMetrics, PowerCurve, DiaryEntry]:
+        q = select(model).where(model.activity_id == activity_id)
+        result = await session.execute(q)
+        for row in result.scalars().all():
+            await session.delete(row)
+
+    await session.delete(activity)
+    await session.commit()
+    return {"ok": True}
+
+
+@router.get("/{activity_id}/diary")
+async def get_diary(
+    activity_id: uuid.UUID,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    activity = await session.get(Activity, activity_id)
+    if not activity or activity.rider_id != rider.id:
+        raise HTTPException(status_code=404, detail="Activity not found")
+
+    query = select(DiaryEntry).where(DiaryEntry.activity_id == activity_id)
+    result = await session.execute(query)
+    diary = result.scalar_one_or_none()
+
+    if not diary:
+        return {"rider_notes": None, "mood": None, "rpe": None, "sleep_hours": None}
+
+    return {
+        "rider_notes": diary.rider_notes,
+        "mood": diary.mood,
+        "rpe": diary.rpe,
+        "sleep_hours": diary.sleep_hours,
+    }
+
+
+@router.put("/{activity_id}/diary")
+async def update_diary(
+    activity_id: uuid.UUID,
+    data: dict,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    activity = await session.get(Activity, activity_id)
+    if not activity or activity.rider_id != rider.id:
+        raise HTTPException(status_code=404, detail="Activity not found")
+
+    query = select(DiaryEntry).where(DiaryEntry.activity_id == activity_id)
+    result = await session.execute(query)
+    diary = result.scalar_one_or_none()
+
+    if not diary:
+        diary = DiaryEntry(activity_id=activity_id)
+        session.add(diary)
+
+    for field in ["rider_notes", "mood", "rpe", "sleep_hours"]:
+        if field in data:
+            setattr(diary, field, data[field])
+
+    await session.commit()
+    return {
+        "rider_notes": diary.rider_notes,
+        "mood": diary.mood,
+        "rpe": diary.rpe,
+        "sleep_hours": diary.sleep_hours,
+    }
diff --git a/backend/app/api/coaching.py b/backend/app/api/coaching.py
new file mode 100644
index 0000000..31eed10
--- /dev/null
+++ b/backend/app/api/coaching.py
@@ -0,0 +1,307 @@
+"""Coaching API endpoints — onboarding, chat, plan, compliance."""
+
+import uuid
+
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from backend.app.core.auth import get_current_rider
+from backend.app.core.database import get_session
+from backend.app.models.coaching import CoachingChat
+from backend.app.models.rider import Rider
+from backend.app.models.training import TrainingPlan
+from backend.app.services.coaching import (
+    process_chat_message,
+    generate_plan,
+    get_today_workout,
+    calculate_compliance,
+)
+
+router = APIRouter()
+
+
+class MessageRequest(BaseModel):
+    message: str
+
+
+class ChatResponse(BaseModel):
+    chat_id: str
+    chat_type: str
+    status: str
+    messages: list[dict]
+
+
+class PlanResponse(BaseModel):
+    id: str
+    goal: str
+    start_date: str
+    end_date: str
+    phase: str | None
+    description: str | None
+    status: str
+    weeks: list[dict]
+
+
+# --- Onboarding ---
+
+@router.post("/onboarding/start")
+async def start_onboarding(
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Start or resume onboarding chat."""
+    # Check for existing active onboarding
+    query = (
+        select(CoachingChat)
+        .where(CoachingChat.rider_id == rider.id)
+        .where(CoachingChat.chat_type == "onboarding")
+        .where(CoachingChat.status == "active")
+        .order_by(CoachingChat.created_at.desc())
+        .limit(1)
+    )
+    result = await session.execute(query)
+    chat = result.scalar_one_or_none()
+
+    if chat:
+        return {
+            "chat_id": str(chat.id),
+            "status": chat.status,
+            "messages": chat.messages_json or [],
+            "onboarding_completed": rider.onboarding_completed,
+        }
+
+    # Create new onboarding chat
+    chat = CoachingChat(
+        rider_id=rider.id,
+        chat_type="onboarding",
+        status="active",
+        messages_json=[],
+    )
+    session.add(chat)
+    await session.commit()
+    await session.refresh(chat)
+
+    # Send initial greeting by processing an empty-ish message
+    response = await process_chat_message(rider, chat.id, "Привет! Я хочу начать тренировки.", session)
+
+    return {
+        "chat_id": str(chat.id),
+        "status": chat.status,
+        "messages": chat.messages_json or [],
+        "onboarding_completed": rider.onboarding_completed,
+    }
+
+
+@router.get("/onboarding/status")
+async def get_onboarding_status(
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Check onboarding status."""
+    return {
+        "onboarding_completed": rider.onboarding_completed,
+        "coaching_profile": rider.coaching_profile,
+    }
+
+
+# --- Chat ---
+
+@router.post("/chat/new")
+async def create_chat(
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Create a new general coaching chat."""
+    chat = CoachingChat(
+        rider_id=rider.id,
+        chat_type="general",
+        status="active",
+        messages_json=[],
+    )
+    session.add(chat)
+    await session.commit()
+    await session.refresh(chat)
+    return {"chat_id": str(chat.id), "status": "active", "messages": []}
+
+
+@router.get("/chats")
+async def list_chats(
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """List all coaching chats."""
+    query = (
+        select(CoachingChat)
+        .where(CoachingChat.rider_id == rider.id)
+        .order_by(CoachingChat.updated_at.desc())
+        .limit(20)
+    )
+    result = await session.execute(query)
+    chats = result.scalars().all()
+    return [
+        {
+            "id": str(c.id),
+            "chat_type": c.chat_type,
+            "status": c.status,
+            "message_count": len(c.messages_json or []),
+            "created_at": c.created_at.isoformat() if c.created_at else None,
+            "updated_at": c.updated_at.isoformat() if c.updated_at else None,
+            "last_message": (c.messages_json[-1]["text"][:100] if c.messages_json else None),
+        }
+        for c in chats
+    ]
+
+
+@router.get("/chat/{chat_id}")
+async def get_chat(
+    chat_id: uuid.UUID,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Get chat with messages."""
+    chat = await session.get(CoachingChat, chat_id)
+    if not chat or chat.rider_id != rider.id:
+        raise HTTPException(status_code=404, detail="Chat not found")
+    return {
+        "chat_id": str(chat.id),
+        "chat_type": chat.chat_type,
+        "status": chat.status,
+        "messages": chat.messages_json or [],
+    }
+
+
+@router.post("/chat/{chat_id}/message")
+async def send_message(
+    chat_id: uuid.UUID,
+    body: MessageRequest,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Send a message to the coaching chat."""
+    response = await process_chat_message(rider, chat_id, body.message, session)
+
+    chat = await session.get(CoachingChat, chat_id)
+    return {
+        "response": response,
+        "chat_id": str(chat_id),
+        "status": chat.status if chat else "active",
+        "messages": chat.messages_json if chat else [],
+        "onboarding_completed": rider.onboarding_completed,
+    }
+
+
+# --- Training Plan ---
+
+@router.post("/plan/generate")
+async def create_plan(
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Generate a new AI training plan."""
+    plan = await generate_plan(rider, session)
+    return _plan_to_dict(plan)
+
+
+@router.get("/plan/active")
+async def get_active_plan(
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Get the active training plan."""
+    query = (
+        select(TrainingPlan)
+        .where(TrainingPlan.rider_id == rider.id)
+        .where(TrainingPlan.status == "active")
+        .order_by(TrainingPlan.created_at.desc())
+        .limit(1)
+    )
+    result = await session.execute(query)
+    plan = result.scalar_one_or_none()
+    if not plan:
+        return None
+    return _plan_to_dict(plan)
+
+
+@router.get("/plan/{plan_id}/compliance")
+async def get_plan_compliance(
+    plan_id: uuid.UUID,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Get compliance data for a plan."""
+    plan = await session.get(TrainingPlan, plan_id)
+    if not plan or plan.rider_id != rider.id:
+        raise HTTPException(status_code=404, detail="Plan not found")
+    compliance = await calculate_compliance(plan, session)
+    return compliance
+
+
+@router.get("/today")
+async def get_today(
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Get today's planned workout."""
+    workout = await get_today_workout(rider, session)
+    return workout
+
+
+# --- Adjustment chat ---
+
+@router.post("/plan/adjust")
+async def start_plan_adjustment(
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Start an adjustment chat for the active plan."""
+    # Check active plan exists
+    plan_query = (
+        select(TrainingPlan)
+        .where(TrainingPlan.rider_id == rider.id)
+        .where(TrainingPlan.status == "active")
+        .limit(1)
+    )
+    plan_result = await session.execute(plan_query)
+    plan = plan_result.scalar_one_or_none()
+    if not plan:
+        raise HTTPException(status_code=400, detail="No active plan to adjust")
+
+    chat = CoachingChat(
+        rider_id=rider.id,
+        chat_type="adjustment",
+        status="active",
+        messages_json=[],
+    )
+    session.add(chat)
+    await session.commit()
+    await session.refresh(chat)
+
+    # Start with context about what needs adjustment
+    response = await process_chat_message(
+        rider, chat.id,
+        "Мне нужно скорректировать мой текущий план тренировок. Посмотри на мои последние данные и предложи изменения.",
+        session,
+    )
+
+    return {
+        "chat_id": str(chat.id),
+        "status": chat.status,
+        "messages": chat.messages_json or [],
+        "response": response,
+    }
+
+
+def _plan_to_dict(plan: TrainingPlan) -> dict:
+    weeks = plan.weeks_json.get("weeks", []) if plan.weeks_json else []
+    return {
+        "id": str(plan.id),
+        "goal": plan.goal,
+        "start_date": plan.start_date.isoformat(),
+        "end_date": plan.end_date.isoformat(),
+        "phase": plan.phase,
+        "description": plan.description,
+        "status": plan.status,
+        "weeks": weeks,
+    }
diff --git a/backend/app/api/rider.py b/backend/app/api/rider.py
index 3d2a14a..8cde000 100644
--- a/backend/app/api/rider.py
+++ b/backend/app/api/rider.py
@@ -1,52 +1,146 @@
-import uuid
+from datetime import date, timedelta
 
-from fastapi import APIRouter, Depends, HTTPException
+from fastapi import APIRouter, Depends
+from sqlalchemy import select, func
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from backend.app.core.auth import get_current_rider
 from backend.app.core.database import get_session
+from backend.app.models.activity import Activity, ActivityMetrics
+from backend.app.models.fitness import PowerCurve
 from backend.app.models.rider import Rider
-from backend.app.schemas.rider import RiderCreate, RiderUpdate, RiderResponse
+from backend.app.schemas.rider import RiderUpdate, RiderResponse, FitnessHistoryResponse
+from backend.app.services.fitness import get_fitness_history
 
 router = APIRouter()
 
 
-@router.post("/profile", response_model=RiderResponse)
-async def create_rider(
-    data: RiderCreate,
-    session: AsyncSession = Depends(get_session),
-):
-    rider = Rider(**data.model_dump())
-    session.add(rider)
-    await session.commit()
-    await session.refresh(rider)
+@router.get("/profile", response_model=RiderResponse)
+async def get_rider(rider: Rider = Depends(get_current_rider)):
     return rider
 
 
-@router.get("/profile/{rider_id}", response_model=RiderResponse)
-async def get_rider(
-    rider_id: uuid.UUID,
-    session: AsyncSession = Depends(get_session),
-):
-    rider = await session.get(Rider, rider_id)
-    if not rider:
-        raise HTTPException(status_code=404, detail="Rider not found")
-    return rider
-
-
-@router.put("/profile/{rider_id}", response_model=RiderResponse)
+@router.put("/profile", response_model=RiderResponse)
 async def update_rider(
-    rider_id: uuid.UUID,
     data: RiderUpdate,
+    rider: Rider = Depends(get_current_rider),
     session: AsyncSession = Depends(get_session),
 ):
-    rider = await session.get(Rider, rider_id)
-    if not rider:
-        raise HTTPException(status_code=404, detail="Rider not found")
-
     update_data = data.model_dump(exclude_unset=True)
+    ftp_changed = "ftp" in update_data and update_data["ftp"] != rider.ftp
+
     for key, value in update_data.items():
         setattr(rider, key, value)
 
+    # Recalculate TSS/IF for all activities when FTP changes
+    if ftp_changed and rider.ftp:
+        query = (
+            select(ActivityMetrics)
+            .join(Activity, Activity.id == ActivityMetrics.activity_id)
+            .where(Activity.rider_id == rider.id)
+            .where(ActivityMetrics.normalized_power.isnot(None))
+        )
+        result = await session.execute(query)
+        for metrics in result.scalars().all():
+            np_val = metrics.normalized_power
+            duration_q = await session.execute(
+                select(Activity.duration).where(Activity.id == metrics.activity_id)
+            )
+            duration = duration_q.scalar()
+            if np_val and duration:
+                metrics.intensity_factor = round(np_val / rider.ftp, 2)
+                metrics.tss = round(
+                    (duration * np_val * (np_val / rider.ftp))
+                    / (rider.ftp * 3600)
+                    * 100,
+                    1,
+                )
+
     await session.commit()
     await session.refresh(rider)
     return rider
+
+
+@router.get("/fitness", response_model=list[FitnessHistoryResponse])
+async def get_fitness(
+    days: int = 90,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    entries = await get_fitness_history(rider.id, session, days=days)
+    return entries
+
+
+@router.get("/weekly-stats")
+async def get_weekly_stats(
+    weeks: int = 8,
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    today = date.today()
+    # Start from Monday of current week
+    start_of_week = today - timedelta(days=today.weekday())
+    start_date = start_of_week - timedelta(weeks=weeks - 1)
+
+    week_col = func.date_trunc('week', Activity.date).label("week")
+
+    query = (
+        select(
+            week_col,
+            func.count(Activity.id).label("rides"),
+            func.sum(Activity.duration).label("duration"),
+            func.sum(Activity.distance).label("distance"),
+            func.sum(ActivityMetrics.tss).label("tss"),
+        )
+        .select_from(Activity)
+        .outerjoin(ActivityMetrics, ActivityMetrics.activity_id == Activity.id)
+        .where(Activity.rider_id == rider.id)
+        .where(Activity.date >= start_date)
+        .group_by(week_col)
+        .order_by(week_col)
+    )
+
+    result = await session.execute(query)
+
+    return [
+        {
+            "week": row.week.strftime("%Y-%m-%d") if row.week else None,
+            "rides": row.rides,
+            "duration": row.duration or 0,
+            "distance": round(float(row.distance or 0) / 1000, 1),
+            "tss": round(float(row.tss or 0), 0),
+        }
+        for row in result
+    ]
+
+
+@router.get("/personal-records")
+async def get_personal_records(
+    rider: Rider = Depends(get_current_rider),
+    session: AsyncSession = Depends(get_session),
+):
+    """Best power at each standard duration across all activities."""
+    query = (
+        select(PowerCurve.curve_data, Activity.date, Activity.name, Activity.id)
+        .join(Activity, Activity.id == PowerCurve.activity_id)
+        .where(Activity.rider_id == rider.id)
+    )
+    result = await session.execute(query)
+
+    # Merge all curves: keep best power + source activity for each duration
+    records: dict[int, dict] = {}
+    for row in result:
+        curve_data = row.curve_data
+        for dur_str, power in curve_data.items():
+            dur = int(dur_str)
+            if dur not in records or power > records[dur]["power"]:
+                records[dur] = {
+                    "duration": dur,
+                    "power": power,
+                    "activity_id": str(row.id),
+                    "activity_name": row.name or "Ride",
+                    "date": row.date.isoformat(),
+                }
+
+    # Sort by duration
+    return sorted(records.values(), key=lambda r: r["duration"])
diff --git a/backend/app/api/router.py b/backend/app/api/router.py
index 7a83694..fce9b23 100644
--- a/backend/app/api/router.py
+++ b/backend/app/api/router.py
@@ -3,9 +3,11 @@ from fastapi import APIRouter
 from backend.app.api.auth import router as auth_router
 from backend.app.api.activities import router as activities_router
 from backend.app.api.rider import router as rider_router
+from backend.app.api.coaching import router as coaching_router
 
 api_router = APIRouter(prefix="/api")
 
 api_router.include_router(auth_router, prefix="/auth", tags=["auth"])
 api_router.include_router(activities_router, prefix="/activities", tags=["activities"])
 api_router.include_router(rider_router, prefix="/rider", tags=["rider"])
+api_router.include_router(coaching_router, prefix="/coaching", tags=["coaching"])
diff --git a/backend/app/bot.py b/backend/app/bot.py
new file mode 100644
index 0000000..e64f4b3
--- /dev/null
+++ b/backend/app/bot.py
@@ -0,0 +1,186 @@
+"""Telegram bot for uploading .FIT files."""
+
+import logging
+import uuid
+from pathlib import Path
+
+from aiogram import Bot, Dispatcher, Router, F
+from aiogram.types import Message, InlineKeyboardMarkup, InlineKeyboardButton, WebAppInfo
+from aiogram.filters import CommandStart
+from sqlalchemy import select
+
+from backend.app.core.config import settings
+from backend.app.core.database import async_session
+from backend.app.models.rider import Rider
+from backend.app.models.activity import Activity
+from backend.app.models.fitness import PowerCurve
+from backend.app.services.fit_parser import parse_fit_file
+from backend.app.services.metrics import calculate_metrics
+from backend.app.services.intervals import detect_intervals
+from backend.app.services.power_curve import calculate_power_curve
+
+logger = logging.getLogger(__name__)
+
+router = Router()
+
+
+async def get_or_create_rider(telegram_id: int, name: str, username: str | None) -> Rider:
+    """Find rider by telegram_id or create a new one."""
+    async with async_session() as session:
+        query = select(Rider).where(Rider.telegram_id == telegram_id)
+        result = await session.execute(query)
+        rider = result.scalar_one_or_none()
+
+        if not rider:
+            rider = Rider(
+                telegram_id=telegram_id,
+                telegram_username=username,
+                name=name,
+            )
+            session.add(rider)
+            await session.commit()
+            await session.refresh(rider)
+
+        return rider
+
+
+async def process_fit_upload(content: bytes, rider: Rider) -> Activity:
+    """Parse FIT file and save activity with all related data."""
+    upload_dir = Path(settings.UPLOAD_DIR)
+    upload_dir.mkdir(parents=True, exist_ok=True)
+
+    file_id = uuid.uuid4()
+    file_path = upload_dir / f"{file_id}.fit"
+    file_path.write_bytes(content)
+
+    async with async_session() as session:
+        # Re-attach rider to this session
+        rider = await session.get(Rider, rider.id)
+
+        activity, data_points = parse_fit_file(content, rider.id, str(file_path))
+        session.add(activity)
+        await session.flush()
+
+        for dp in data_points:
+            dp.activity_id = activity.id
+        session.add_all(data_points)
+
+        metrics = calculate_metrics(data_points, activity, ftp=rider.ftp)
+        if metrics:
+            session.add(metrics)
+
+        intervals = detect_intervals(data_points, ftp=rider.ftp)
+        for interval in intervals:
+            interval.activity_id = activity.id
+        session.add_all(intervals)
+
+        curve_data = calculate_power_curve(data_points)
+        if curve_data:
+            pc = PowerCurve(activity_id=activity.id, curve_data=curve_data)
+            session.add(pc)
+
+        await session.commit()
+        await session.refresh(activity)
+        return activity
+
+
+def format_duration(seconds: int) -> str:
+    h = seconds // 3600
+    m = (seconds % 3600) // 60
+    return f"{h}h {m}m" if h > 0 else f"{m}m"
+
+
+@router.message(CommandStart())
+async def cmd_start(message: Message):
+    user = message.from_user
+    await get_or_create_rider(
+        telegram_id=user.id,
+        name=user.full_name,
+        username=user.username,
+    )
+    await message.answer(
+        f"Welcome to VeloBrain, {user.first_name}!\n\n"
+        "Send me a .FIT file from your bike computer and I'll analyze your ride.\n\n"
+        "I'll calculate:\n"
+        "- Power metrics (NP, TSS, IF)\n"
+        "- Power zones & HR zones\n"
+        "- Power curve\n"
+        "- Interval detection\n\n"
+        "Just drag & drop your .FIT file here!"
+    )
+
+
+@router.message(F.document)
+async def handle_document(message: Message, bot: Bot):
+    doc = message.document
+    if not doc.file_name or not doc.file_name.lower().endswith(".fit"):
+        await message.answer("Please send a .FIT file.")
+        return
+
+    user = message.from_user
+    rider = await get_or_create_rider(
+        telegram_id=user.id,
+        name=user.full_name,
+        username=user.username,
+    )
+
+    status_msg = await message.answer("Processing your .FIT file...")
+
+    try:
+        file = await bot.download(doc)
+        content = file.read()
+
+        activity = await process_fit_upload(content, rider)
+
+        m = activity.metrics
+        lines = [
+            f"*{activity.name or 'Ride'}*",
+            f"Duration: {format_duration(activity.duration)}",
+        ]
+
+        if activity.distance:
+            lines.append(f"Distance: {activity.distance / 1000:.1f} km")
+        if activity.elevation_gain:
+            lines.append(f"Elevation: {activity.elevation_gain:.0f} m")
+
+        if m:
+            if m.avg_power:
+                lines.append(f"Avg Power: {m.avg_power:.0f} W")
+            if m.normalized_power:
+                lines.append(f"NP: {m.normalized_power:.0f} W")
+            if m.tss:
+                lines.append(f"TSS: {m.tss:.0f}")
+            if m.intensity_factor:
+                lines.append(f"IF: {m.intensity_factor:.2f}")
+            if m.avg_hr:
+                lines.append(f"Avg HR: {m.avg_hr} bpm")
+            if m.avg_cadence:
+                lines.append(f"Avg Cadence: {m.avg_cadence} rpm")
+
+        intervals_count = len(activity.intervals or [])
+        if intervals_count > 0:
+            work = [i for i in activity.intervals if i.interval_type == "work"]
+            lines.append(f"Intervals: {len(work)} work / {intervals_count - len(work)} rest")
+
+        lines.append(f"\nView details in the web app!")
+        keyboard = InlineKeyboardMarkup(inline_keyboard=[[InlineKeyboardButton(text="Открыть в WebApp", web_app=WebAppInfo(url=f"https://sport.luminic.space//activities/{activity.id}"))]])
+        await status_msg.edit_text("\n".join(lines), parse_mode="Markdown", reply_markup=keyboard)
+
+    except Exception as e:
+        logger.exception("Error processing FIT file")
+        await status_msg.edit_text(f"Error processing file: {str(e)}")
+
+
+@router.message()
+async def handle_other(message: Message):
+    await message.answer(
+        "Send me a .FIT file to analyze your ride!\n"
+        "Use /start to see what I can do."
+    )
+
+
+def create_bot() -> tuple[Bot, Dispatcher]:
+    bot = Bot(token=settings.TELEGRAM_BOT_TOKEN)
+    dp = Dispatcher()
+    dp.include_router(router)
+    return bot, dp
diff --git a/backend/app/main.py b/backend/app/main.py
index e68d177..2e417c9 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -1,3 +1,5 @@
+import asyncio
+import logging
 from contextlib import asynccontextmanager
 
 from fastapi import FastAPI
@@ -6,12 +8,29 @@ from fastapi.middleware.cors import CORSMiddleware
 from backend.app.api.router import api_router
 from backend.app.core.config import settings
 
+logger = logging.getLogger(__name__)
+
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
-    # Startup
+    # Start Telegram bot polling in background
+    bot_task = None
+    if settings.TELEGRAM_BOT_TOKEN:
+        from backend.app.bot import create_bot
+        bot, dp = create_bot()
+        bot_task = asyncio.create_task(dp.start_polling(bot))
+        logger.info("Telegram bot polling started")
+
     yield
+
     # Shutdown
+    if bot_task:
+        bot_task.cancel()
+        try:
+            await bot_task
+        except asyncio.CancelledError:
+            pass
+        logger.info("Telegram bot polling stopped")
 
 
 app = FastAPI(
diff --git a/backend/app/models/__init__.py b/backend/app/models/__init__.py
index d72ea56..5653510 100644
--- a/backend/app/models/__init__.py
+++ b/backend/app/models/__init__.py
@@ -2,6 +2,7 @@ from backend.app.models.rider import Rider
 from backend.app.models.activity import Activity, ActivityMetrics, DataPoint, Interval
 from backend.app.models.fitness import FitnessHistory, PowerCurve, DiaryEntry
 from backend.app.models.training import TrainingPlan
+from backend.app.models.coaching import CoachingChat
 
 __all__ = [
     "Rider",
@@ -13,4 +14,5 @@ __all__ = [
     "PowerCurve",
     "DiaryEntry",
     "TrainingPlan",
+    "CoachingChat",
 ]
diff --git a/backend/app/models/coaching.py b/backend/app/models/coaching.py
new file mode 100644
index 0000000..5de372b
--- /dev/null
+++ b/backend/app/models/coaching.py
@@ -0,0 +1,22 @@
+import uuid
+from datetime import datetime
+
+from sqlalchemy import String, DateTime, ForeignKey, func
+from sqlalchemy.dialects.postgresql import UUID, JSONB
+from sqlalchemy.orm import Mapped, mapped_column
+
+from backend.app.core.database import Base
+
+
+class CoachingChat(Base):
+    __tablename__ = "coaching_chats"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    rider_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("riders.id"))
+    chat_type: Mapped[str] = mapped_column(String(50))  # onboarding | general | adjustment
+    messages_json: Mapped[list] = mapped_column(JSONB, default=list)  # [{role, text, timestamp}]
+    status: Mapped[str] = mapped_column(String(20), default="active")  # active | completed
+    context_snapshot: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
+
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
diff --git a/backend/app/models/rider.py b/backend/app/models/rider.py
index 3e28a5a..c2a397a 100644
--- a/backend/app/models/rider.py
+++ b/backend/app/models/rider.py
@@ -1,7 +1,7 @@
 import uuid
 from datetime import datetime
 
-from sqlalchemy import String, Float, BigInteger, DateTime, func
+from sqlalchemy import String, Float, Boolean, BigInteger, DateTime, func
 from sqlalchemy.dialects.postgresql import UUID, JSONB
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
@@ -22,6 +22,8 @@ class Rider(Base):
     zones_config: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
     goals: Mapped[str | None] = mapped_column(String(500), nullable=True)
     experience_level: Mapped[str | None] = mapped_column(String(50), nullable=True)
+    coaching_profile: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
+    onboarding_completed: Mapped[bool] = mapped_column(Boolean, default=False)
 
     created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
     updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
diff --git a/backend/app/models/training.py b/backend/app/models/training.py
index 60dedf6..5d5fa53 100644
--- a/backend/app/models/training.py
+++ b/backend/app/models/training.py
@@ -1,7 +1,7 @@
 import uuid
 from datetime import date, datetime
 
-from sqlalchemy import String, Date, DateTime, ForeignKey, Text, func
+from sqlalchemy import String, Boolean, Date, DateTime, ForeignKey, Text, func
 from sqlalchemy.dialects.postgresql import UUID, JSONB
 from sqlalchemy.orm import Mapped, mapped_column
 
@@ -19,5 +19,8 @@ class TrainingPlan(Base):
     phase: Mapped[str | None] = mapped_column(String(50), nullable=True)
     weeks_json: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
     description: Mapped[str | None] = mapped_column(Text, nullable=True)
+    status: Mapped[str] = mapped_column(String(20), default="active")  # draft | active | completed | cancelled
+    onboarding_data: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
 
     created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
diff --git a/backend/app/schemas/activity.py b/backend/app/schemas/activity.py
index 2f66b43..c3a83ad 100644
--- a/backend/app/schemas/activity.py
+++ b/backend/app/schemas/activity.py
@@ -17,6 +17,19 @@ class ActivityMetricsResponse(BaseModel):
     max_hr: int | None = None
     avg_cadence: int | None = None
     avg_speed: float | None = None
+    calories: int | None = None
+
+
+class IntervalResponse(BaseModel):
+    model_config = {"from_attributes": True}
+
+    id: UUID
+    start_ts: datetime
+    end_ts: datetime
+    interval_type: str
+    avg_power: float | None = None
+    avg_hr: int | None = None
+    duration: int | None = None
 
 
 class ActivityResponse(BaseModel):
@@ -31,6 +44,7 @@ class ActivityResponse(BaseModel):
     distance: float | None = None
     elevation_gain: float | None = None
     metrics: ActivityMetricsResponse | None = None
+    intervals: list[IntervalResponse] = []
 
 
 class ActivityListResponse(BaseModel):
@@ -50,3 +64,29 @@ class DataPointResponse(BaseModel):
     longitude: float | None = None
     altitude: float | None = None
     temperature: int | None = None
+
+
+class ZoneItem(BaseModel):
+    zone: int
+    name: str
+    seconds: int
+    percentage: float
+
+
+class PowerZoneItem(ZoneItem):
+    min_watts: int
+    max_watts: int | None = None
+
+
+class HrZoneItem(ZoneItem):
+    min_bpm: int
+    max_bpm: int | None = None
+
+
+class ZonesResponse(BaseModel):
+    power_zones: list[PowerZoneItem] = []
+    hr_zones: list[HrZoneItem] = []
+
+
+class PowerCurveResponse(BaseModel):
+    curve: dict[int, int]  # {duration_seconds: max_power}
diff --git a/backend/app/schemas/rider.py b/backend/app/schemas/rider.py
index 58f05af..0b80f71 100644
--- a/backend/app/schemas/rider.py
+++ b/backend/app/schemas/rider.py
@@ -1,3 +1,4 @@
+from datetime import date
 from uuid import UUID
 
 from pydantic import BaseModel
@@ -22,6 +23,16 @@ class RiderUpdate(BaseModel):
     experience_level: str | None = None
 
 
+class FitnessHistoryResponse(BaseModel):
+    model_config = {"from_attributes": True}
+
+    date: date
+    ctl: float
+    atl: float
+    tsb: float
+    ramp_rate: float | None = None
+
+
 class RiderResponse(BaseModel):
     model_config = {"from_attributes": True}
 
@@ -36,3 +47,5 @@ class RiderResponse(BaseModel):
     zones_config: dict | None = None
     goals: str | None = None
     experience_level: str | None = None
+    coaching_profile: dict | None = None
+    onboarding_completed: bool = False
diff --git a/backend/app/services/ai_summary.py b/backend/app/services/ai_summary.py
new file mode 100644
index 0000000..afc9bc5
--- /dev/null
+++ b/backend/app/services/ai_summary.py
@@ -0,0 +1,62 @@
+"""Generate AI activity summaries using Gemini."""
+
+from backend.app.models.activity import Activity, ActivityMetrics
+from backend.app.services.gemini_client import chat_async
+
+SYSTEM_PROMPT = """You are VeloBrain, an AI cycling coach.
+Analyze the cycling activity data and provide a concise, insightful summary in 3-5 sentences.
+Focus on: performance highlights, pacing strategy, areas for improvement, and training effect.
+Be specific with numbers. Use a friendly, coaching tone.
+Respond in Russian.
+Use a HTML text formatting."""
+
+
+def _build_activity_prompt(activity: Activity, rider_ftp: float | None = None) -> str:
+    m: ActivityMetrics | None = activity.metrics
+    lines = [
+        f"Activity: {activity.name or 'Ride'}",
+        f"Type: {activity.activity_type}",
+        f"Duration: {activity.duration // 3600}h {(activity.duration % 3600) // 60}m",
+    ]
+
+    if activity.distance:
+        lines.append(f"Distance: {activity.distance / 1000:.1f} km")
+    if activity.elevation_gain:
+        lines.append(f"Elevation: {activity.elevation_gain:.0f} m")
+
+    if m:
+        if m.avg_power:
+            lines.append(f"Avg Power: {m.avg_power:.0f} W")
+        if m.normalized_power:
+            lines.append(f"Normalized Power: {m.normalized_power:.0f} W")
+        if m.tss:
+            lines.append(f"TSS: {m.tss:.0f}")
+        if m.intensity_factor:
+            lines.append(f"IF: {m.intensity_factor:.2f}")
+        if m.variability_index:
+            lines.append(f"VI: {m.variability_index:.2f}")
+        if m.avg_hr:
+            lines.append(f"Avg HR: {m.avg_hr} bpm")
+        if m.max_hr:
+            lines.append(f"Max HR: {m.max_hr} bpm")
+        if m.avg_cadence:
+            lines.append(f"Avg Cadence: {m.avg_cadence} rpm")
+
+    if rider_ftp:
+        lines.append(f"Rider FTP: {rider_ftp:.0f} W")
+
+    intervals = activity.intervals or []
+    work_intervals = [i for i in intervals if i.interval_type == "work"]
+    if work_intervals:
+        lines.append(f"Work intervals: {len(work_intervals)}")
+        powers = [i.avg_power for i in work_intervals if i.avg_power]
+        if powers:
+            lines.append(f"Interval avg powers: {', '.join(f'{p:.0f}W' for p in powers)}")
+
+    return "\n".join(lines)
+
+
+async def generate_summary(activity: Activity, rider_ftp: float | None = None) -> str:
+    prompt = _build_activity_prompt(activity, rider_ftp)
+    messages = [{"role": "user", "text": prompt}]
+    return await chat_async(messages, system_instruction=SYSTEM_PROMPT, temperature=0.5)
diff --git a/backend/app/services/coaching.py b/backend/app/services/coaching.py
new file mode 100644
index 0000000..b0a23f8
--- /dev/null
+++ b/backend/app/services/coaching.py
@@ -0,0 +1,461 @@
+"""AI Coaching service — onboarding, plan generation, chat."""
+
+import json
+import re
+from datetime import date, datetime, timedelta
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from backend.app.models.activity import Activity, ActivityMetrics
+from backend.app.models.coaching import CoachingChat
+from backend.app.models.fitness import FitnessHistory, PowerCurve
+from backend.app.models.rider import Rider
+from backend.app.models.training import TrainingPlan
+from backend.app.services.gemini_client import chat_async
+
+
+ONBOARDING_SYSTEM = """You are VeloBrain AI Coach — a professional cycling coach.
+You are conducting an onboarding interview with a new athlete.
+
+Ask questions ONE AT A TIME, in a friendly conversational tone.
+Keep responses short (2-3 sentences + question).
+
+Questions to cover (in rough order):
+1. Main cycling goal (fitness, racing, gran fondo, weight loss, etc.)
+2. Target event/race (if any) and its date
+3. Current weekly training volume (hours/week)
+4. How many days per week they can train
+5. Which days are available for training
+6. Indoor trainer availability (smart trainer, basic, none)
+7. Power meter availability
+8. Any injuries or health concerns
+9. Previous coaching or structured training experience
+10. What they enjoy most about cycling
+
+When ALL questions are answered, respond with your summary and then output EXACTLY this marker on a new line:
+[ONBOARDING_COMPLETE]
+Followed by a JSON block with the structured data:
+```json
+{
+  "goal": "...",
+  "target_event": "...",
+  "target_event_date": "...",
+  "hours_per_week": N,
+  "days_per_week": N,
+  "available_days": ["monday", ...],
+  "has_indoor_trainer": true/false,
+  "trainer_type": "smart/basic/none",
+  "has_power_meter": true/false,
+  "injuries": "...",
+  "coaching_experience": "...",
+  "enjoys": "..."
+}
+```
+
+Respond in Russian."""
+
+
+PLAN_GENERATION_SYSTEM = """You are VeloBrain AI Coach generating a structured training plan.
+Based on the rider's profile, current fitness, and goals, create a detailed multi-week training plan.
+
+Output ONLY a valid JSON block with this structure:
+```json
+{
+  "goal": "short goal description",
+  "description": "plan overview in 2-3 sentences",
+  "phase": "base/build/peak/recovery",
+  "duration_weeks": N,
+  "weeks": [
+    {
+      "week_number": 1,
+      "focus": "week focus description",
+      "target_tss": 300,
+      "target_hours": 8,
+      "days": [
+        {
+          "day": "monday",
+          "workout_type": "rest",
+          "title": "Rest Day",
+          "description": "",
+          "duration_minutes": 0,
+          "target_tss": 0,
+          "target_if": 0
+        }
+      ]
+    }
+  ]
+}
+```
+
+workout_type options: rest, endurance, tempo, sweetspot, threshold, vo2max, sprint, recovery, race
+Plan duration: 4-8 weeks based on goal.
+Include progressive overload with recovery weeks every 3-4 weeks.
+Adjust intensity based on rider's FTP and experience level.
+All descriptions in Russian."""
+
+
+ADJUSTMENT_SYSTEM = """You are VeloBrain AI Coach reviewing a training plan.
+The rider's plan needs adjustment based on their recent performance, compliance, and fatigue.
+
+Analyze the data provided and suggest specific changes to upcoming weeks.
+When you've decided on adjustments, output:
+[PLAN_ADJUSTED]
+Followed by the updated weeks JSON.
+
+Respond in Russian."""
+
+
+GENERAL_CHAT_SYSTEM = """You are VeloBrain AI Coach — a knowledgeable and supportive cycling coach.
+You have access to the rider's training data and can answer questions about:
+- Training methodology and periodization
+- Nutrition and recovery
+- Equipment and bike fit
+- Race strategy and pacing
+- Interpreting their power/HR data
+
+Be concise, specific, and actionable. Use the rider's actual data when relevant.
+Respond in Russian."""
+
+
+async def build_rider_context(rider: Rider, session: AsyncSession) -> str:
+    """Build a concise context string with rider's current state."""
+    lines = [
+        f"Rider: {rider.name}",
+        f"FTP: {rider.ftp or 'not set'} W",
+        f"Weight: {rider.weight or 'not set'} kg",
+        f"LTHR: {rider.lthr or 'not set'} bpm",
+        f"Experience: {rider.experience_level or 'not set'}",
+        f"Goals: {rider.goals or 'not set'}",
+    ]
+
+    if rider.ftp and rider.weight:
+        lines.append(f"W/kg: {rider.ftp / rider.weight:.2f}")
+
+    # Coaching profile
+    if rider.coaching_profile:
+        cp = rider.coaching_profile
+        lines.append(f"\nCoaching Profile:")
+        for k, v in cp.items():
+            lines.append(f"  {k}: {v}")
+
+    # Fitness (latest CTL/ATL/TSB)
+    fh_query = (
+        select(FitnessHistory)
+        .where(FitnessHistory.rider_id == rider.id)
+        .order_by(FitnessHistory.date.desc())
+        .limit(1)
+    )
+    fh_result = await session.execute(fh_query)
+    fh = fh_result.scalar_one_or_none()
+    if fh:
+        lines.append(f"\nFitness: CTL={fh.ctl:.0f} ATL={fh.atl:.0f} TSB={fh.tsb:.0f}")
+
+    # Recent 4 weeks volume
+    four_weeks_ago = date.today() - timedelta(weeks=4)
+    vol_query = (
+        select(
+            Activity.date,
+            Activity.duration,
+            ActivityMetrics.tss,
+        )
+        .outerjoin(ActivityMetrics, ActivityMetrics.activity_id == Activity.id)
+        .where(Activity.rider_id == rider.id)
+        .where(Activity.date >= four_weeks_ago)
+        .order_by(Activity.date.desc())
+    )
+    vol_result = await session.execute(vol_query)
+    rides = list(vol_result.all())
+    if rides:
+        total_hours = sum(r.duration for r in rides) / 3600
+        total_tss = sum(float(r.tss or 0) for r in rides)
+        lines.append(f"\nLast 4 weeks: {len(rides)} rides, {total_hours:.1f}h, TSS={total_tss:.0f}")
+        lines.append(f"Avg/week: {total_hours / 4:.1f}h, TSS={total_tss / 4:.0f}")
+
+    # Personal records (from power curves)
+    pc_query = (
+        select(PowerCurve.curve_data)
+        .join(Activity, Activity.id == PowerCurve.activity_id)
+        .where(Activity.rider_id == rider.id)
+    )
+    pc_result = await session.execute(pc_query)
+    best: dict[int, int] = {}
+    for row in pc_result:
+        for dur_str, power in row.curve_data.items():
+            dur = int(dur_str)
+            if dur not in best or power > best[dur]:
+                best[dur] = power
+    if best:
+        pr_strs = []
+        for dur in sorted(best.keys()):
+            if dur < 60:
+                pr_strs.append(f"{dur}s={best[dur]}W")
+            elif dur < 3600:
+                pr_strs.append(f"{dur // 60}m={best[dur]}W")
+            else:
+                pr_strs.append(f"{dur // 3600}h={best[dur]}W")
+        lines.append(f"\nPower PRs: {', '.join(pr_strs)}")
+
+    # Active plan status
+    plan_query = (
+        select(TrainingPlan)
+        .where(TrainingPlan.rider_id == rider.id)
+        .where(TrainingPlan.status == "active")
+        .order_by(TrainingPlan.created_at.desc())
+        .limit(1)
+    )
+    plan_result = await session.execute(plan_query)
+    plan = plan_result.scalar_one_or_none()
+    if plan:
+        lines.append(f"\nActive plan: '{plan.goal}' ({plan.start_date} to {plan.end_date}), phase: {plan.phase}")
+
+    return "\n".join(lines)
+
+
+async def process_chat_message(
+    rider: Rider,
+    chat_id,
+    user_message: str,
+    session: AsyncSession,
+) -> str:
+    """Process a user message in a coaching chat and return AI response."""
+    chat = await session.get(CoachingChat, chat_id)
+    if not chat or chat.rider_id != rider.id:
+        raise ValueError("Chat not found")
+
+    # Build context
+    rider_context = await build_rider_context(rider, session)
+
+    # Select system prompt
+    system_prompts = {
+        "onboarding": ONBOARDING_SYSTEM,
+        "general": GENERAL_CHAT_SYSTEM,
+        "adjustment": ADJUSTMENT_SYSTEM,
+    }
+    system = system_prompts.get(chat.chat_type, GENERAL_CHAT_SYSTEM)
+    system = f"{system}\n\n--- Rider Data ---\n{rider_context}"
+
+    # Build message history
+    messages = list(chat.messages_json or [])
+    messages.append({"role": "user", "text": user_message})
+
+    # Call Gemini
+    gemini_messages = [{"role": m["role"], "text": m["text"]} for m in messages]
+    response = await chat_async(gemini_messages, system_instruction=system, temperature=0.7)
+
+    # Save messages
+    now = datetime.utcnow().isoformat()
+    messages_to_save = list(chat.messages_json or [])
+    messages_to_save.append({"role": "user", "text": user_message, "timestamp": now})
+    messages_to_save.append({"role": "model", "text": response, "timestamp": now})
+    chat.messages_json = messages_to_save
+
+    # Check for onboarding completion
+    if chat.chat_type == "onboarding" and "[ONBOARDING_COMPLETE]" in response:
+        chat.status = "completed"
+        profile_data = _extract_json(response)
+        if profile_data:
+            rider.coaching_profile = profile_data
+            rider.onboarding_completed = True
+            if profile_data.get("goal"):
+                rider.goals = profile_data["goal"]
+
+    # Check for plan adjustment
+    if chat.chat_type == "adjustment" and "[PLAN_ADJUSTED]" in response:
+        chat.status = "completed"
+        plan_data = _extract_json(response)
+        if plan_data:
+            plan_query = (
+                select(TrainingPlan)
+                .where(TrainingPlan.rider_id == rider.id)
+                .where(TrainingPlan.status == "active")
+                .order_by(TrainingPlan.created_at.desc())
+                .limit(1)
+            )
+            plan_result = await session.execute(plan_query)
+            plan = plan_result.scalar_one_or_none()
+            if plan and "weeks" in plan_data:
+                current = plan.weeks_json or {}
+                current["weeks"] = plan_data["weeks"]
+                plan.weeks_json = current
+
+    await session.commit()
+    return response
+
+
+async def generate_plan(rider: Rider, session: AsyncSession) -> TrainingPlan:
+    """Generate a new training plan using AI."""
+    rider_context = await build_rider_context(rider, session)
+
+    prompt = f"Generate a training plan for this rider.\n\n{rider_context}"
+    messages = [{"role": "user", "text": prompt}]
+
+    response = await chat_async(
+        messages,
+        system_instruction=PLAN_GENERATION_SYSTEM,
+        temperature=0.5,
+    )
+
+    plan_data = _extract_json(response)
+    if not plan_data or "weeks" not in plan_data:
+        raise ValueError("Failed to parse plan from AI response")
+
+    # Cancel existing active plans
+    existing_query = (
+        select(TrainingPlan)
+        .where(TrainingPlan.rider_id == rider.id)
+        .where(TrainingPlan.status == "active")
+    )
+    existing_result = await session.execute(existing_query)
+    for old_plan in existing_result.scalars().all():
+        old_plan.status = "cancelled"
+
+    duration_weeks = plan_data.get("duration_weeks", len(plan_data["weeks"]))
+    start = date.today()
+    # Align to next Monday
+    days_until_monday = (7 - start.weekday()) % 7
+    if days_until_monday == 0:
+        days_until_monday = 0
+    start = start + timedelta(days=days_until_monday)
+
+    plan = TrainingPlan(
+        rider_id=rider.id,
+        goal=plan_data.get("goal", rider.goals or "General fitness"),
+        start_date=start,
+        end_date=start + timedelta(weeks=duration_weeks),
+        phase=plan_data.get("phase", "base"),
+        weeks_json=plan_data,
+        description=plan_data.get("description", ""),
+        status="active",
+        onboarding_data=rider.coaching_profile,
+    )
+    session.add(plan)
+    await session.commit()
+    await session.refresh(plan)
+    return plan
+
+
+async def get_today_workout(rider: Rider, session: AsyncSession) -> dict | None:
+    """Get today's planned workout from the active plan."""
+    plan_query = (
+        select(TrainingPlan)
+        .where(TrainingPlan.rider_id == rider.id)
+        .where(TrainingPlan.status == "active")
+        .order_by(TrainingPlan.created_at.desc())
+        .limit(1)
+    )
+    result = await session.execute(plan_query)
+    plan = result.scalar_one_or_none()
+    if not plan or not plan.weeks_json:
+        return None
+
+    today = date.today()
+    if today < plan.start_date or today > plan.end_date:
+        return None
+
+    week_num = (today - plan.start_date).days // 7 + 1
+    day_name = today.strftime("%A").lower()
+
+    weeks = plan.weeks_json.get("weeks", [])
+    for week in weeks:
+        if week.get("week_number") == week_num:
+            for day in week.get("days", []):
+                if day.get("day") == day_name:
+                    return {
+                        "plan_id": str(plan.id),
+                        "plan_goal": plan.goal,
+                        "week_number": week_num,
+                        "week_focus": week.get("focus", ""),
+                        **day,
+                    }
+
+    return None
+
+
+async def calculate_compliance(plan: TrainingPlan, session: AsyncSession) -> list[dict]:
+    """Compare planned vs actual per week."""
+    if not plan.weeks_json:
+        return []
+
+    weeks = plan.weeks_json.get("weeks", [])
+    results = []
+
+    for week in weeks:
+        week_num = week.get("week_number", 0)
+        week_start = plan.start_date + timedelta(weeks=week_num - 1)
+        week_end = week_start + timedelta(days=7)
+
+        # Skip future weeks
+        if week_start > date.today():
+            results.append({
+                "week_number": week_num,
+                "focus": week.get("focus", ""),
+                "planned_tss": week.get("target_tss", 0),
+                "actual_tss": 0,
+                "planned_hours": week.get("target_hours", 0),
+                "actual_hours": 0,
+                "planned_rides": sum(1 for d in week.get("days", []) if d.get("workout_type") != "rest"),
+                "actual_rides": 0,
+                "adherence_pct": 0,
+                "status": "upcoming",
+            })
+            continue
+
+        # Get actual activities in this week
+        act_query = (
+            select(Activity, ActivityMetrics.tss)
+            .outerjoin(ActivityMetrics, ActivityMetrics.activity_id == Activity.id)
+            .where(Activity.rider_id == plan.rider_id)
+            .where(Activity.date >= week_start)
+            .where(Activity.date < week_end)
+        )
+        act_result = await session.execute(act_query)
+        acts = list(act_result.all())
+
+        actual_tss = sum(float(r.tss or 0) for r in acts)
+        actual_hours = sum(r[0].duration for r in acts) / 3600
+        actual_rides = len(acts)
+        planned_rides = sum(1 for d in week.get("days", []) if d.get("workout_type") != "rest")
+        planned_tss = week.get("target_tss", 0)
+
+        adherence = 0
+        if planned_rides > 0:
+            adherence = min(100, round(actual_rides / planned_rides * 100))
+
+        is_current = week_start <= date.today() < week_end
+
+        results.append({
+            "week_number": week_num,
+            "focus": week.get("focus", ""),
+            "planned_tss": planned_tss,
+            "actual_tss": round(actual_tss, 0),
+            "planned_hours": week.get("target_hours", 0),
+            "actual_hours": round(actual_hours, 1),
+            "planned_rides": planned_rides,
+            "actual_rides": actual_rides,
+            "adherence_pct": adherence,
+            "status": "current" if is_current else "completed",
+        })
+
+    return results
+
+
+def _extract_json(text: str) -> dict | None:
+    """Extract JSON from AI response text."""
+    # Try to find JSON in code blocks
+    match = re.search(r"```(?:json)?\s*\n?(.*?)\n?```", text, re.DOTALL)
+    if match:
+        try:
+            return json.loads(match.group(1))
+        except json.JSONDecodeError:
+            pass
+
+    # Try to find raw JSON object
+    match = re.search(r"\{[\s\S]*\}", text)
+    if match:
+        try:
+            return json.loads(match.group(0))
+        except json.JSONDecodeError:
+            pass
+
+    return None
diff --git a/backend/app/services/fitness.py b/backend/app/services/fitness.py
new file mode 100644
index 0000000..d60b56d
--- /dev/null
+++ b/backend/app/services/fitness.py
@@ -0,0 +1,107 @@
+"""CTL / ATL / TSB (Fitness / Fatigue / Form) calculation service."""
+
+from datetime import date, timedelta
+
+from sqlalchemy import select, func
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from backend.app.models.activity import Activity, ActivityMetrics
+from backend.app.models.fitness import FitnessHistory
+
+CTL_DAYS = 42  # Chronic Training Load time constant
+ATL_DAYS = 7   # Acute Training Load time constant
+
+
+async def rebuild_fitness_history(
+    rider_id,
+    session: AsyncSession,
+    days_back: int = 365,
+) -> list[FitnessHistory]:
+    """Rebuild CTL/ATL/TSB for a rider from scratch using exponential moving averages."""
+
+    end_date = date.today()
+    start_date = end_date - timedelta(days=days_back)
+
+    # Get all activities with TSS in the date range
+    query = (
+        select(
+            func.date(Activity.date).label("activity_date"),
+            func.sum(ActivityMetrics.tss).label("daily_tss"),
+        )
+        .join(ActivityMetrics, ActivityMetrics.activity_id == Activity.id)
+        .where(Activity.rider_id == rider_id)
+        .where(Activity.date >= start_date)
+        .where(ActivityMetrics.tss.isnot(None))
+        .group_by(func.date(Activity.date))
+        .order_by(func.date(Activity.date))
+    )
+
+    result = await session.execute(query)
+    tss_by_date: dict[date, float] = {}
+    for row in result:
+        tss_by_date[row.activity_date] = float(row.daily_tss)
+
+    # Delete existing history for this rider
+    existing = await session.execute(
+        select(FitnessHistory).where(FitnessHistory.rider_id == rider_id)
+    )
+    for entry in existing.scalars().all():
+        await session.delete(entry)
+
+    # Calculate EMA-based CTL/ATL/TSB
+    ctl = 0.0
+    atl = 0.0
+    prev_ctl = 0.0
+    entries: list[FitnessHistory] = []
+
+    current = start_date
+    while current <= end_date:
+        daily_tss = tss_by_date.get(current, 0.0)
+
+        ctl = ctl + (daily_tss - ctl) / CTL_DAYS
+        atl = atl + (daily_tss - atl) / ATL_DAYS
+        tsb = ctl - atl
+        ramp_rate = ctl - prev_ctl
+
+        entry = FitnessHistory(
+            rider_id=rider_id,
+            date=current,
+            ctl=round(ctl, 1),
+            atl=round(atl, 1),
+            tsb=round(tsb, 1),
+            ramp_rate=round(ramp_rate, 2),
+        )
+        entries.append(entry)
+
+        prev_ctl = ctl
+        current += timedelta(days=1)
+
+    session.add_all(entries)
+    await session.flush()
+    return entries
+
+
+async def get_fitness_history(
+    rider_id,
+    session: AsyncSession,
+    days: int = 90,
+) -> list[FitnessHistory]:
+    """Get fitness history for a rider, rebuilding if needed."""
+
+    cutoff = date.today() - timedelta(days=days)
+
+    query = (
+        select(FitnessHistory)
+        .where(FitnessHistory.rider_id == rider_id)
+        .where(FitnessHistory.date >= cutoff)
+        .order_by(FitnessHistory.date)
+    )
+    result = await session.execute(query)
+    entries = list(result.scalars().all())
+
+    # If no data or stale, rebuild
+    if not entries or entries[-1].date < date.today() - timedelta(days=1):
+        all_entries = await rebuild_fitness_history(rider_id, session)
+        entries = [e for e in all_entries if e.date >= cutoff]
+
+    return entries
diff --git a/backend/app/services/intervals.py b/backend/app/services/intervals.py
new file mode 100644
index 0000000..b1c2df1
--- /dev/null
+++ b/backend/app/services/intervals.py
@@ -0,0 +1,88 @@
+import numpy as np
+
+from backend.app.models.activity import DataPoint, Interval
+
+
+def detect_intervals(
+    data_points: list[DataPoint],
+    ftp: float | None = None,
+    min_duration: int = 30,
+) -> list[Interval]:
+    """
+    Auto-detect work/rest intervals based on power thresholds.
+    Work = power >= 88% FTP (sweetspot and above)
+    Rest = power < 55% FTP (active recovery)
+    """
+    powers = [dp.power for dp in data_points]
+    if not any(p is not None for p in powers):
+        return []
+
+    if not ftp or ftp <= 0:
+        # Without FTP, use median power as threshold
+        valid_powers = [p for p in powers if p is not None and p > 0]
+        if not valid_powers:
+            return []
+        threshold_high = np.median(valid_powers) * 1.15
+        threshold_low = np.median(valid_powers) * 0.65
+    else:
+        threshold_high = ftp * 0.88
+        threshold_low = ftp * 0.55
+
+    intervals: list[Interval] = []
+    current_type: str | None = None
+    start_idx: int = 0
+
+    for i, dp in enumerate(data_points):
+        p = dp.power if dp.power is not None else 0
+        if p >= threshold_high:
+            new_type = "work"
+        elif p < threshold_low:
+            new_type = "rest"
+        else:
+            continue  # tempo zone — don't break interval
+
+        if current_type is None:
+            current_type = new_type
+            start_idx = i
+        elif new_type != current_type:
+            interval = _build_interval(data_points, start_idx, i - 1, current_type, min_duration)
+            if interval:
+                intervals.append(interval)
+            current_type = new_type
+            start_idx = i
+
+    # Close last interval
+    if current_type is not None:
+        interval = _build_interval(data_points, start_idx, len(data_points) - 1, current_type, min_duration)
+        if interval:
+            intervals.append(interval)
+
+    return intervals
+
+
+def _build_interval(
+    data_points: list[DataPoint],
+    start_idx: int,
+    end_idx: int,
+    interval_type: str,
+    min_duration: int,
+) -> Interval | None:
+    segment = data_points[start_idx:end_idx + 1]
+    if len(segment) < min_duration:
+        return None
+
+    powers = [dp.power for dp in segment if dp.power is not None]
+    hrs = [dp.heart_rate for dp in segment if dp.heart_rate is not None]
+
+    duration = int((segment[-1].timestamp - segment[0].timestamp).total_seconds())
+    if duration < min_duration:
+        return None
+
+    return Interval(
+        start_ts=segment[0].timestamp,
+        end_ts=segment[-1].timestamp,
+        interval_type=interval_type,
+        avg_power=round(sum(powers) / len(powers), 1) if powers else None,
+        avg_hr=round(sum(hrs) / len(hrs)) if hrs else None,
+        duration=duration,
+    )
diff --git a/backend/app/services/metrics.py b/backend/app/services/metrics.py
index b61a156..c862f61 100644
--- a/backend/app/services/metrics.py
+++ b/backend/app/services/metrics.py
@@ -1,20 +1,14 @@
-import uuid
-
 import numpy as np
-from sqlalchemy import select
-from sqlalchemy.ext.asyncio import AsyncSession
 
 from backend.app.models.activity import Activity, ActivityMetrics, DataPoint
-from backend.app.models.rider import Rider
 
 
 def calculate_metrics(
     data_points: list[DataPoint],
     activity: Activity,
-    rider_id: uuid.UUID,
-    session: AsyncSession,
+    ftp: float | None = None,
 ) -> ActivityMetrics | None:
-    """Calculate power-based metrics for an activity."""
+    """Calculate all power/HR-based metrics for an activity."""
     if not data_points:
         return None
 
@@ -23,61 +17,60 @@ def calculate_metrics(
     cadences = np.array([dp.cadence for dp in data_points if dp.cadence is not None], dtype=float)
     speeds = np.array([dp.speed for dp in data_points if dp.speed is not None], dtype=float)
 
-    avg_power = float(np.mean(powers)) if len(powers) > 0 else None
-    max_power = int(np.max(powers)) if len(powers) > 0 else None
+    has_power = len(powers) > 0
+    has_hr = len(hrs) > 0
+
+    avg_power = float(np.mean(powers)) if has_power else None
+    max_power = int(np.max(powers)) if has_power else None
     np_value = _normalized_power(powers) if len(powers) >= 30 else avg_power
 
-    avg_hr = int(np.mean(hrs)) if len(hrs) > 0 else None
-    max_hr = int(np.max(hrs)) if len(hrs) > 0 else None
+    avg_hr = int(np.mean(hrs)) if has_hr else None
+    max_hr = int(np.max(hrs)) if has_hr else None
     avg_cadence = int(np.mean(cadences)) if len(cadences) > 0 else None
     avg_speed = float(np.mean(speeds)) if len(speeds) > 0 else None
 
-    # IF, VI, TSS require FTP — will be None if no FTP set
-    intensity_factor = None
+    # Variability Index
     variability_index = None
-    tss = None
-
     if np_value and avg_power and avg_power > 0:
-        variability_index = np_value / avg_power
+        variability_index = round(np_value / avg_power, 2)
+
+    # FTP-dependent metrics
+    intensity_factor = None
+    tss = None
+    if np_value and ftp and ftp > 0:
+        intensity_factor = round(np_value / ftp, 2)
+        tss = round(
+            (activity.duration * np_value * (np_value / ftp))
+            / (ftp * 3600)
+            * 100,
+            1,
+        )
+
+    # Efficiency Factor: NP / avg HR (aerobic decoupling indicator)
+    calories = None
+    if has_power:
+        # Rough estimate: 1 kJ ≈ 1 kcal, power in watts * seconds / 1000
+        calories = int(np.sum(powers) / 1000)
 
     return ActivityMetrics(
         activity_id=activity.id,
         tss=tss,
         normalized_power=round(np_value, 1) if np_value else None,
         intensity_factor=intensity_factor,
-        variability_index=round(variability_index, 2) if variability_index else None,
+        variability_index=variability_index,
         avg_power=round(avg_power, 1) if avg_power else None,
         max_power=max_power,
         avg_hr=avg_hr,
         max_hr=max_hr,
         avg_cadence=avg_cadence,
         avg_speed=round(avg_speed, 2) if avg_speed else None,
+        calories=calories,
     )
 
 
-def calculate_metrics_with_ftp(
-    metrics: ActivityMetrics,
-    ftp: float,
-    duration_seconds: int,
-) -> ActivityMetrics:
-    """Enrich metrics with FTP-dependent values (IF, TSS)."""
-    if metrics.normalized_power and ftp > 0:
-        metrics.intensity_factor = round(metrics.normalized_power / ftp, 2)
-        metrics.tss = round(
-            (duration_seconds * metrics.normalized_power * metrics.intensity_factor)
-            / (ftp * 3600)
-            * 100,
-            1,
-        )
-    return metrics
-
-
 def _normalized_power(powers: np.ndarray) -> float:
-    """
-    NP = 4th root of mean of 4th powers of 30s rolling average.
-    """
+    """NP = 4th root of mean of (30s rolling average)^4."""
     if len(powers) < 30:
         return float(np.mean(powers))
-
     rolling = np.convolve(powers, np.ones(30) / 30, mode="valid")
     return float(np.power(np.mean(np.power(rolling, 4)), 0.25))
diff --git a/backend/app/services/power_curve.py b/backend/app/services/power_curve.py
new file mode 100644
index 0000000..799589b
--- /dev/null
+++ b/backend/app/services/power_curve.py
@@ -0,0 +1,30 @@
+import numpy as np
+
+from backend.app.models.activity import DataPoint
+
+# Standard durations for the power duration curve
+DURATIONS = [1, 5, 10, 15, 30, 60, 120, 300, 600, 1200, 1800, 3600]
+
+
+def calculate_power_curve(data_points: list[DataPoint]) -> dict[int, int]:
+    """
+    Calculate max average power for standard durations.
+    Returns {duration_seconds: max_avg_power}.
+    """
+    powers = np.array([dp.power for dp in data_points if dp.power is not None], dtype=float)
+    if len(powers) == 0:
+        return {}
+
+    result = {}
+    for dur in DURATIONS:
+        if dur > len(powers):
+            break
+        if dur == 1:
+            result[dur] = int(np.max(powers))
+        else:
+            # Rolling mean via cumsum for efficiency
+            cumsum = np.cumsum(np.insert(powers, 0, 0))
+            rolling_avg = (cumsum[dur:] - cumsum[:-dur]) / dur
+            result[dur] = int(np.max(rolling_avg))
+
+    return result
diff --git a/backend/app/services/zones.py b/backend/app/services/zones.py
new file mode 100644
index 0000000..1595e85
--- /dev/null
+++ b/backend/app/services/zones.py
@@ -0,0 +1,75 @@
+import numpy as np
+
+from backend.app.models.activity import DataPoint
+
+# Coggan 7-zone power model (% of FTP)
+POWER_ZONES = [
+    {"zone": 1, "name": "Active Recovery", "min_pct": 0, "max_pct": 55},
+    {"zone": 2, "name": "Endurance", "min_pct": 55, "max_pct": 75},
+    {"zone": 3, "name": "Tempo", "min_pct": 75, "max_pct": 90},
+    {"zone": 4, "name": "Threshold", "min_pct": 90, "max_pct": 105},
+    {"zone": 5, "name": "VO2max", "min_pct": 105, "max_pct": 120},
+    {"zone": 6, "name": "Anaerobic", "min_pct": 120, "max_pct": 150},
+    {"zone": 7, "name": "Neuromuscular", "min_pct": 150, "max_pct": 10000},
+]
+
+# 5-zone HR model (% of LTHR)
+HR_ZONES = [
+    {"zone": 1, "name": "Recovery", "min_pct": 0, "max_pct": 81},
+    {"zone": 2, "name": "Aerobic", "min_pct": 81, "max_pct": 90},
+    {"zone": 3, "name": "Tempo", "min_pct": 90, "max_pct": 95},
+    {"zone": 4, "name": "Threshold", "min_pct": 95, "max_pct": 100},
+    {"zone": 5, "name": "Anaerobic", "min_pct": 100, "max_pct": 10000},
+]
+
+
+def calculate_power_zones(
+    data_points: list[DataPoint],
+    ftp: float,
+) -> list[dict]:
+    """Calculate time-in-zone distribution for power."""
+    powers = np.array([dp.power for dp in data_points if dp.power is not None], dtype=float)
+    if len(powers) == 0 or ftp <= 0:
+        return []
+
+    total = len(powers)
+    result = []
+    for z in POWER_ZONES:
+        low = ftp * z["min_pct"] / 100
+        high = ftp * z["max_pct"] / 100
+        seconds = int(np.sum((powers >= low) & (powers < high)))
+        result.append({
+            "zone": z["zone"],
+            "name": z["name"],
+            "min_watts": round(low),
+            "max_watts": round(high) if z["max_pct"] < 10000 else None,
+            "seconds": seconds,
+            "percentage": round(seconds / total * 100, 1) if total > 0 else 0,
+        })
+    return result
+
+
+def calculate_hr_zones(
+    data_points: list[DataPoint],
+    lthr: int,
+) -> list[dict]:
+    """Calculate time-in-zone distribution for heart rate."""
+    hrs = np.array([dp.heart_rate for dp in data_points if dp.heart_rate is not None], dtype=float)
+    if len(hrs) == 0 or lthr <= 0:
+        return []
+
+    total = len(hrs)
+    result = []
+    for z in HR_ZONES:
+        low = lthr * z["min_pct"] / 100
+        high = lthr * z["max_pct"] / 100
+        seconds = int(np.sum((hrs >= low) & (hrs < high)))
+        result.append({
+            "zone": z["zone"],
+            "name": z["name"],
+            "min_bpm": round(low),
+            "max_bpm": round(high) if z["max_pct"] < 10000 else None,
+            "seconds": seconds,
+            "percentage": round(seconds / total * 100, 1) if total > 0 else 0,
+        })
+    return result
diff --git a/fit.fit b/fit.fit
new file mode 100644
index 0000000..0000f56
Binary files /dev/null and b/fit.fit differ
diff --git a/frontend/.env.development b/frontend/.env.development
new file mode 100644
index 0000000..81892cc
--- /dev/null
+++ b/frontend/.env.development
@@ -0,0 +1,2 @@
+VITE_API_URL=http://localhost:8099/api
+VITE_ENABLE_DEVTOOLS=true
\ No newline at end of file
diff --git a/frontend/.env.production b/frontend/.env.production
new file mode 100644
index 0000000..912abf0
--- /dev/null
+++ b/frontend/.env.production
@@ -0,0 +1,2 @@
+VITE_API_URL=https://sport.luminic.space/api
+VITE_ENABLE_DEVTOOLS=false
\ No newline at end of file
diff --git a/frontend/index.html b/frontend/index.html
index 722f403..bfd400f 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -1,5 +1,5 @@
 <!doctype html>
-<html lang="en" class="app-dark">
+<html lang="en">
   <head>
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 48b0c1f..b6832c8 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -1,30 +1,61 @@
 <script setup lang="ts">
 import { RouterLink, RouterView } from 'vue-router'
-import { computed } from 'vue'
+import { computed, onMounted, ref } from 'vue'
 import { useAuthStore } from './stores/auth'
 import Button from 'primevue/button'
 import Avatar from 'primevue/avatar'
 
 const auth = useAuthStore()
 const isAuthenticated = computed(() => auth.isAuthenticated)
+const mobileMenuOpen = ref(false)
+
+onMounted(async () => {
+  if (auth.isAuthenticated && !auth.rider) {
+    await auth.fetchRider()
+  }
+})
 </script>
 
 <template>
-  <div class="min-h-screen bg-surface-950 text-surface-0">
-    <nav v-if="isAuthenticated" class="flex items-center justify-between px-8 h-14 bg-surface-900 border-b border-surface-700">
+  <div class="min-h-screen bg-surface-50 text-surface-900">
+    <nav v-if="isAuthenticated" class="flex items-center justify-between px-4 md:px-8 h-14 bg-white border-b border-surface-200 shadow-sm">
       <RouterLink to="/" class="text-xl font-bold text-primary">VeloBrain</RouterLink>
-      <div class="flex items-center gap-6">
-        <RouterLink to="/" class="text-surface-400 hover:text-surface-0 text-sm transition-colors" active-class="!text-surface-0">Dashboard</RouterLink>
-        <RouterLink to="/activities" class="text-surface-400 hover:text-surface-0 text-sm transition-colors" active-class="!text-surface-0">Activities</RouterLink>
-        <RouterLink to="/settings" class="text-surface-400 hover:text-surface-0 text-sm transition-colors" active-class="!text-surface-0">Settings</RouterLink>
+
+      <!-- Desktop nav -->
+      <div class="hidden md:flex items-center gap-6">
+        <RouterLink to="/" class="text-surface-400 hover:text-primary text-sm font-medium transition-colors" active-class="!text-primary">Dashboard</RouterLink>
+        <RouterLink to="/activities" class="text-surface-400 hover:text-primary text-sm font-medium transition-colors" active-class="!text-primary">Activities</RouterLink>
+        <RouterLink to="/coach" class="text-surface-400 hover:text-primary text-sm font-medium transition-colors" active-class="!text-primary">Coach</RouterLink>
+        <RouterLink to="/settings" class="text-surface-400 hover:text-primary text-sm font-medium transition-colors" active-class="!text-primary">Settings</RouterLink>
         <div class="flex items-center gap-3 ml-4">
+          <span v-if="auth.rider" class="text-surface-600 text-sm">{{ auth.rider.name }}</span>
           <Avatar v-if="auth.rider?.avatar_url" :image="auth.rider.avatar_url" shape="circle" size="small" />
           <Avatar v-else :label="auth.rider?.name?.charAt(0) ?? '?'" shape="circle" size="small" />
           <Button icon="pi pi-sign-out" text rounded severity="secondary" size="small" @click="auth.logout()" />
         </div>
       </div>
+
+      <!-- Mobile hamburger -->
+      <Button icon="pi pi-bars" text rounded severity="secondary" size="small" class="md:hidden" @click="mobileMenuOpen = !mobileMenuOpen" />
     </nav>
-    <main class="max-w-[1200px] mx-auto p-8">
+
+    <!-- Mobile menu dropdown -->
+    <div v-if="isAuthenticated && mobileMenuOpen" class="md:hidden bg-white border-b border-surface-200 shadow-sm px-4 py-3 flex flex-col gap-3">
+      <RouterLink to="/" class="text-surface-600 hover:text-primary text-sm font-medium py-1" @click="mobileMenuOpen = false">Dashboard</RouterLink>
+      <RouterLink to="/activities" class="text-surface-600 hover:text-primary text-sm font-medium py-1" @click="mobileMenuOpen = false">Activities</RouterLink>
+      <RouterLink to="/coach" class="text-surface-600 hover:text-primary text-sm font-medium py-1" @click="mobileMenuOpen = false">Coach</RouterLink>
+      <RouterLink to="/settings" class="text-surface-600 hover:text-primary text-sm font-medium py-1" @click="mobileMenuOpen = false">Settings</RouterLink>
+      <div class="flex items-center justify-between pt-2 border-t border-surface-100">
+        <div class="flex items-center gap-2">
+          <Avatar v-if="auth.rider?.avatar_url" :image="auth.rider.avatar_url" shape="circle" size="small" />
+          <Avatar v-else :label="auth.rider?.name?.charAt(0) ?? '?'" shape="circle" size="small" />
+          <span v-if="auth.rider" class="text-surface-600 text-sm">{{ auth.rider.name }}</span>
+        </div>
+        <Button icon="pi pi-sign-out" text rounded severity="secondary" size="small" @click="auth.logout()" />
+      </div>
+    </div>
+
+    <main class="max-w-[1200px] mx-auto p-4 md:p-8">
       <RouterView />
     </main>
   </div>
diff --git a/frontend/src/composables/useApi.ts b/frontend/src/composables/useApi.ts
index a22ef1a..3d3feab 100644
--- a/frontend/src/composables/useApi.ts
+++ b/frontend/src/composables/useApi.ts
@@ -1,7 +1,7 @@
 import axios from 'axios'
 
 const api = axios.create({
-  baseURL: '/api',
+  baseURL: import.meta.env.VITE_API_URL,
 })
 
 api.interceptors.request.use((config) => {
diff --git a/frontend/src/router.ts b/frontend/src/router.ts
index 9dea6c9..75a9d27 100644
--- a/frontend/src/router.ts
+++ b/frontend/src/router.ts
@@ -26,6 +26,12 @@ const routes = [
     component: () => import('./views/ActivityDetailView.vue'),
     meta: { requiresAuth: true },
   },
+  {
+    path: '/coach',
+    name: 'coach',
+    component: () => import('./views/CoachView.vue'),
+    meta: { requiresAuth: true },
+  },
   {
     path: '/settings',
     name: 'settings',
diff --git a/frontend/src/stores/activities.ts b/frontend/src/stores/activities.ts
index 878c389..fbcf17e 100644
--- a/frontend/src/stores/activities.ts
+++ b/frontend/src/stores/activities.ts
@@ -1,32 +1,89 @@
 import { defineStore } from 'pinia'
 import { ref } from 'vue'
 import { useApi } from '../composables/useApi'
-import type { Activity } from '../types/models'
+import type { Activity, DataPoint, ZonesResponse, PowerCurveResponse, FitnessEntry, DiaryEntry, WeeklyStats, PersonalRecord } from '../types/models'
 
 export const useActivitiesStore = defineStore('activities', () => {
   const { api } = useApi()
   const activities = ref<Activity[]>([])
   const total = ref(0)
+  const loading = ref(false)
 
-  async function fetchActivities(riderId: string, limit = 20, offset = 0) {
-    const { data } = await api.get('/activities', {
-      params: { rider_id: riderId, limit, offset },
-    })
-    activities.value = data.items
-    total.value = data.total
+  async function fetchActivities(limit = 20, offset = 0) {
+    loading.value = true
+    try {
+      const { data } = await api.get('/activities', { params: { limit, offset } })
+      activities.value = data.items
+      total.value = data.total
+    } finally {
+      loading.value = false
+    }
   }
 
-  async function uploadFit(riderId: string, file: File) {
+  async function fetchActivity(id: string): Promise<Activity> {
+    const { data } = await api.get<Activity>(`/activities/${id}`)
+    return data
+  }
+
+  async function fetchStream(id: string): Promise<DataPoint[]> {
+    const { data } = await api.get<DataPoint[]>(`/activities/${id}/stream`)
+    return data
+  }
+
+  async function fetchZones(id: string): Promise<ZonesResponse> {
+    const { data } = await api.get<ZonesResponse>(`/activities/${id}/zones`)
+    return data
+  }
+
+  async function fetchPowerCurve(id: string): Promise<PowerCurveResponse> {
+    const { data } = await api.get<PowerCurveResponse>(`/activities/${id}/power-curve`)
+    return data
+  }
+
+  async function uploadFit(file: File): Promise<Activity> {
     const form = new FormData()
     form.append('file', file)
-    const { data } = await api.post<Activity>(
-      `/activities/upload?rider_id=${riderId}`,
-      form,
-    )
+    const { data } = await api.post<Activity>('/activities/upload', form)
     activities.value.unshift(data)
     total.value++
     return data
   }
 
-  return { activities, total, fetchActivities, uploadFit }
+  async function fetchAiSummary(id: string): Promise<string> {
+    const { data } = await api.post<{ summary: string }>(`/activities/${id}/ai-summary`)
+    return data.summary
+  }
+
+  async function fetchFitness(days = 90): Promise<FitnessEntry[]> {
+    const { data } = await api.get<FitnessEntry[]>('/rider/fitness', { params: { days } })
+    return data
+  }
+
+  async function deleteActivity(id: string): Promise<void> {
+    await api.delete(`/activities/${id}`)
+    activities.value = activities.value.filter(a => a.id !== id)
+    total.value--
+  }
+
+  async function fetchDiary(id: string): Promise<DiaryEntry> {
+    const { data } = await api.get<DiaryEntry>(`/activities/${id}/diary`)
+    return data
+  }
+
+  async function updateDiary(id: string, diary: Partial<DiaryEntry>): Promise<DiaryEntry> {
+    const { data } = await api.put<DiaryEntry>(`/activities/${id}/diary`, diary)
+    return data
+  }
+
+  async function fetchPersonalRecords(): Promise<PersonalRecord[]> {
+    const { data } = await api.get<PersonalRecord[]>('/rider/personal-records')
+    return data
+  }
+
+  async function fetchWeeklyStats(weeks = 8): Promise<WeeklyStats[]> {
+    const { data } = await api.get<WeeklyStats[]>('/rider/weekly-stats', { params: { weeks } })
+    return data
+  }
+
+  return { activities, total, loading, fetchActivities, fetchActivity, fetchStream, fetchZones, fetchPowerCurve, uploadFit, fetchAiSummary, fetchFitness, deleteActivity, fetchDiary, updateDiary, fetchWeeklyStats, fetchPersonalRecords }
 })
diff --git a/frontend/src/stores/auth.ts b/frontend/src/stores/auth.ts
index 23c321b..f896456 100644
--- a/frontend/src/stores/auth.ts
+++ b/frontend/src/stores/auth.ts
@@ -29,6 +29,23 @@ export const useAuthStore = defineStore('auth', () => {
     router.push({ name: 'login' })
   }
 
+  async function fetchRider() {
+    if (!token.value) return
+    try {
+      const { data } = await api.get<Rider>('/rider/profile')
+      rider.value = data
+    } catch {
+      // Token invalid — logout
+      logout()
+    }
+  }
+
+  async function updateRider(updates: Partial<Rider>) {
+    const { data } = await api.put<Rider>('/rider/profile', updates)
+    rider.value = data
+    return data
+  }
+
   async function loginWithTelegram(data: TelegramLoginData) {
     const { data: response } = await api.post<AuthResponse>('/auth/telegram-login', data)
     setAuth(response)
@@ -41,5 +58,5 @@ export const useAuthStore = defineStore('auth', () => {
     router.push({ name: 'dashboard' })
   }
 
-  return { token, rider, isAuthenticated, loginWithTelegram, loginWithWebApp, logout }
+  return { token, rider, isAuthenticated, fetchRider, updateRider, loginWithTelegram, loginWithWebApp, logout }
 })
diff --git a/frontend/src/stores/coaching.ts b/frontend/src/stores/coaching.ts
new file mode 100644
index 0000000..e2dbbf9
--- /dev/null
+++ b/frontend/src/stores/coaching.ts
@@ -0,0 +1,102 @@
+import { defineStore } from 'pinia'
+import { ref } from 'vue'
+import { useApi } from '../composables/useApi'
+import type { CoachingChat, ChatListItem, TrainingPlan, ComplianceWeek, TodayWorkout } from '../types/models'
+
+export const useCoachingStore = defineStore('coaching', () => {
+  const { api } = useApi()
+  const currentChat = ref<CoachingChat | null>(null)
+  const activePlan = ref<TrainingPlan | null>(null)
+  const todayWorkout = ref<TodayWorkout | null>(null)
+  const loading = ref(false)
+  const sending = ref(false)
+
+  async function startOnboarding(): Promise<CoachingChat> {
+    loading.value = true
+    try {
+      const { data } = await api.post<CoachingChat>('/coaching/onboarding/start')
+      currentChat.value = data
+      return data
+    } finally {
+      loading.value = false
+    }
+  }
+
+  async function getOnboardingStatus(): Promise<{ onboarding_completed: boolean; coaching_profile: Record<string, unknown> | null }> {
+    const { data } = await api.get('/coaching/onboarding/status')
+    return data
+  }
+
+  async function sendMessage(chatId: string, message: string): Promise<CoachingChat> {
+    sending.value = true
+    try {
+      const { data } = await api.post<CoachingChat & { response: string }>(`/coaching/chat/${chatId}/message`, { message })
+      currentChat.value = data
+      return data
+    } finally {
+      sending.value = false
+    }
+  }
+
+  async function createChat(): Promise<CoachingChat> {
+    const { data } = await api.post<CoachingChat>('/coaching/chat/new')
+    currentChat.value = data
+    return data
+  }
+
+  async function getChat(chatId: string): Promise<CoachingChat> {
+    const { data } = await api.get<CoachingChat>(`/coaching/chat/${chatId}`)
+    currentChat.value = data
+    return data
+  }
+
+  async function listChats(): Promise<ChatListItem[]> {
+    const { data } = await api.get<ChatListItem[]>('/coaching/chats')
+    return data
+  }
+
+  async function generatePlan(): Promise<TrainingPlan> {
+    loading.value = true
+    try {
+      const { data } = await api.post<TrainingPlan>('/coaching/plan/generate')
+      activePlan.value = data
+      return data
+    } finally {
+      loading.value = false
+    }
+  }
+
+  async function fetchActivePlan(): Promise<TrainingPlan | null> {
+    const { data } = await api.get<TrainingPlan | null>('/coaching/plan/active')
+    activePlan.value = data
+    return data
+  }
+
+  async function fetchCompliance(planId: string): Promise<ComplianceWeek[]> {
+    const { data } = await api.get<ComplianceWeek[]>(`/coaching/plan/${planId}/compliance`)
+    return data
+  }
+
+  async function fetchTodayWorkout(): Promise<TodayWorkout | null> {
+    const { data } = await api.get<TodayWorkout | null>('/coaching/today')
+    todayWorkout.value = data
+    return data
+  }
+
+  async function startPlanAdjustment(): Promise<CoachingChat & { response: string }> {
+    loading.value = true
+    try {
+      const { data } = await api.post<CoachingChat & { response: string }>('/coaching/plan/adjust')
+      currentChat.value = data
+      return data
+    } finally {
+      loading.value = false
+    }
+  }
+
+  return {
+    currentChat, activePlan, todayWorkout, loading, sending,
+    startOnboarding, getOnboardingStatus, sendMessage, createChat, getChat, listChats,
+    generatePlan, fetchActivePlan, fetchCompliance, fetchTodayWorkout, startPlanAdjustment,
+  }
+})
diff --git a/frontend/src/style.css b/frontend/src/style.css
index e7187bb..bab21e4 100644
--- a/frontend/src/style.css
+++ b/frontend/src/style.css
@@ -1,3 +1,31 @@
 @import "tailwindcss";
 @plugin "tailwindcss-primeui";
 @import "primeicons/primeicons.css";
+
+body {
+  font-family: 'Inter', system-ui, -apple-system, sans-serif;
+  -webkit-font-smoothing: antialiased;
+}
+
+.p-card {
+  border-radius: 12px;
+  border: 1px solid #e5e7eb;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
+  transition: box-shadow 0.2s, border-color 0.2s;
+}
+
+.p-card:hover {
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
+}
+
+.p-datatable .p-datatable-thead > tr > th {
+  background: #f9fafb;
+  font-weight: 600;
+  font-size: 0.8rem;
+  text-transform: uppercase;
+  letter-spacing: 0.03em;
+}
+
+#route-map {
+  z-index: 0;
+}
diff --git a/frontend/src/types/models.ts b/frontend/src/types/models.ts
index b7550fc..b052a7c 100644
--- a/frontend/src/types/models.ts
+++ b/frontend/src/types/models.ts
@@ -10,6 +10,8 @@ export interface Rider {
   zones_config: Record<string, unknown> | null
   goals: string | null
   experience_level: string | null
+  coaching_profile: Record<string, unknown> | null
+  onboarding_completed: boolean
 }
 
 export interface ActivityMetrics {
@@ -23,6 +25,17 @@ export interface ActivityMetrics {
   max_hr: number | null
   avg_cadence: number | null
   avg_speed: number | null
+  calories: number | null
+}
+
+export interface Interval {
+  id: string
+  start_ts: string
+  end_ts: string
+  interval_type: string
+  avg_power: number | null
+  avg_hr: number | null
+  duration: number | null
 }
 
 export interface Activity {
@@ -35,6 +48,7 @@ export interface Activity {
   distance: number | null
   elevation_gain: number | null
   metrics: ActivityMetrics | null
+  intervals: Interval[]
 }
 
 export interface DataPoint {
@@ -48,3 +62,140 @@ export interface DataPoint {
   altitude: number | null
   temperature: number | null
 }
+
+export interface ZoneItem {
+  zone: number
+  name: string
+  seconds: number
+  percentage: number
+}
+
+export interface PowerZoneItem extends ZoneItem {
+  min_watts: number
+  max_watts: number | null
+}
+
+export interface HrZoneItem extends ZoneItem {
+  min_bpm: number
+  max_bpm: number | null
+}
+
+export interface ZonesResponse {
+  power_zones: PowerZoneItem[]
+  hr_zones: HrZoneItem[]
+}
+
+export interface PowerCurveResponse {
+  curve: Record<number, number>
+}
+
+export interface DiaryEntry {
+  rider_notes: string | null
+  mood: string | null
+  rpe: number | null
+  sleep_hours: number | null
+}
+
+export interface WeeklyStats {
+  week: string
+  rides: number
+  duration: number
+  distance: number
+  tss: number
+}
+
+export interface PersonalRecord {
+  duration: number
+  power: number
+  activity_id: string
+  activity_name: string
+  date: string
+}
+
+export interface FitnessEntry {
+  date: string
+  ctl: number
+  atl: number
+  tsb: number
+  ramp_rate: number | null
+}
+
+export interface ChatMessage {
+  role: 'user' | 'model'
+  text: string
+  timestamp?: string
+}
+
+export interface CoachingChat {
+  chat_id: string
+  chat_type: string
+  status: string
+  messages: ChatMessage[]
+  onboarding_completed?: boolean
+}
+
+export interface ChatListItem {
+  id: string
+  chat_type: string
+  status: string
+  message_count: number
+  created_at: string | null
+  updated_at: string | null
+  last_message: string | null
+}
+
+export interface TrainingPlanWeekDay {
+  day: string
+  workout_type: string
+  title: string
+  description: string
+  duration_minutes: number
+  target_tss: number
+  target_if: number
+}
+
+export interface TrainingPlanWeek {
+  week_number: number
+  focus: string
+  target_tss: number
+  target_hours: number
+  days: TrainingPlanWeekDay[]
+}
+
+export interface TrainingPlan {
+  id: string
+  goal: string
+  start_date: string
+  end_date: string
+  phase: string | null
+  description: string | null
+  status: string
+  weeks: TrainingPlanWeek[]
+}
+
+export interface ComplianceWeek {
+  week_number: number
+  focus: string
+  planned_tss: number
+  actual_tss: number
+  planned_hours: number
+  actual_hours: number
+  planned_rides: number
+  actual_rides: number
+  adherence_pct: number
+  status: string
+}
+
+export interface TodayWorkout {
+  plan_id: string
+  plan_goal: string
+  week_number: number
+  week_focus: string
+  day: string
+  workout_type: string
+  title: string
+  description: string
+  duration_minutes: number
+  target_tss: number
+  target_if: number
+}
diff --git a/frontend/src/views/ActivitiesView.vue b/frontend/src/views/ActivitiesView.vue
index 67e624f..6611413 100644
--- a/frontend/src/views/ActivitiesView.vue
+++ b/frontend/src/views/ActivitiesView.vue
@@ -1,18 +1,135 @@
 <script setup lang="ts">
+import { onMounted, ref } from 'vue'
+import { useActivitiesStore } from '../stores/activities'
+import { useRouter } from 'vue-router'
 import Card from 'primevue/card'
 import Button from 'primevue/button'
+import FileUpload from 'primevue/fileupload'
+import Tag from 'primevue/tag'
+import ProgressSpinner from 'primevue/progressspinner'
+
+const store = useActivitiesStore()
+const router = useRouter()
+const uploading = ref(false)
+const uploadError = ref('')
+
+function formatDuration(seconds: number): string {
+  const h = Math.floor(seconds / 3600)
+  const m = Math.floor((seconds % 3600) / 60)
+  return h > 0 ? `${h}h ${m}m` : `${m}m`
+}
+
+function formatDistance(meters: number | null): string {
+  if (!meters) return '—'
+  return `${(meters / 1000).toFixed(1)} km`
+}
+
+function formatDate(iso: string): string {
+  return new Date(iso).toLocaleDateString('en-GB', {
+    day: 'numeric', month: 'short', year: 'numeric', hour: '2-digit', minute: '2-digit',
+  })
+}
+
+async function onUpload(event: any) {
+  const file = event.files?.[0]
+  if (!file) return
+
+  uploading.value = true
+  uploadError.value = ''
+  try {
+    const activity = await store.uploadFit(file)
+    router.push({ name: 'activity-detail', params: { id: activity.id } })
+  } catch (e: any) {
+    uploadError.value = e.response?.data?.detail || 'Upload failed'
+  } finally {
+    uploading.value = false
+  }
+}
+
+onMounted(() => {
+  store.fetchActivities()
+})
 </script>
 
 <template>
   <div>
     <div class="flex items-center justify-between mb-6">
       <h1 class="text-2xl font-semibold">Activities</h1>
-      <Button label="Upload .FIT" icon="pi pi-upload" />
+      <FileUpload
+        mode="basic"
+        accept=".fit"
+        :auto="true"
+        choose-label="Upload .FIT"
+        choose-icon="pi pi-upload"
+        :custom-upload="true"
+        @uploader="onUpload"
+      />
+    </div>
+
+    <div v-if="uploading" class="flex items-center gap-3 mb-4">
+      <ProgressSpinner style="width: 24px; height: 24px" />
+      <span class="text-surface-500 text-sm">Processing .FIT file...</span>
+    </div>
+
+    <p v-if="uploadError" class="text-red-500 text-sm mb-4">{{ uploadError }}</p>
+
+    <div v-if="store.loading && !uploading" class="flex justify-center py-12">
+      <ProgressSpinner style="width: 40px; height: 40px" />
+    </div>
+
+    <div v-else-if="store.activities.length === 0" class="text-surface-500 py-12 text-center">
+      No activities yet. Upload your first .FIT file!
+    </div>
+
+    <div v-else class="flex flex-col gap-3">
+      <Card
+        v-for="a in store.activities"
+        :key="a.id"
+        class="cursor-pointer hover:border-primary transition-colors"
+        @click="router.push({ name: 'activity-detail', params: { id: a.id } })"
+      >
+        <template #content>
+          <div class="flex items-center justify-between flex-wrap gap-4">
+            <div class="flex items-center gap-4">
+              <div>
+                <p class="font-semibold">{{ a.name || 'Ride' }}</p>
+                <p class="text-surface-500 text-sm">{{ formatDate(a.date) }}</p>
+              </div>
+              <Tag :value="a.activity_type" severity="info" class="text-xs" />
+            </div>
+            <div class="flex items-center gap-6 text-sm">
+              <div class="text-center">
+                <p class="text-surface-500 text-xs">Duration</p>
+                <p class="font-semibold">{{ formatDuration(a.duration) }}</p>
+              </div>
+              <div class="text-center">
+                <p class="text-surface-500 text-xs">Distance</p>
+                <p class="font-semibold">{{ formatDistance(a.distance) }}</p>
+              </div>
+              <div v-if="a.elevation_gain" class="text-center">
+                <p class="text-surface-500 text-xs">Elevation</p>
+                <p class="font-semibold">{{ a.elevation_gain }}m</p>
+              </div>
+              <div v-if="a.metrics?.avg_power" class="text-center">
+                <p class="text-surface-500 text-xs">Avg Power</p>
+                <p class="font-semibold">{{ a.metrics.avg_power }}W</p>
+              </div>
+              <div v-if="a.metrics?.normalized_power" class="text-center">
+                <p class="text-surface-500 text-xs">NP</p>
+                <p class="font-semibold">{{ a.metrics.normalized_power }}W</p>
+              </div>
+              <div v-if="a.metrics?.tss" class="text-center">
+                <p class="text-surface-500 text-xs">TSS</p>
+                <p class="font-semibold">{{ a.metrics.tss }}</p>
+              </div>
+              <div v-if="a.metrics?.avg_hr" class="text-center">
+                <p class="text-surface-500 text-xs">Avg HR</p>
+                <p class="font-semibold">{{ a.metrics.avg_hr }}</p>
+              </div>
+            </div>
+          </div>
+        </template>
+      </Card>
     </div>
-    <Card>
-      <template #content>
-        <p class="text-surface-400">Activity list with filters — coming soon</p>
-      </template>
-    </Card>
   </div>
 </template>
diff --git a/frontend/src/views/ActivityDetailView.vue b/frontend/src/views/ActivityDetailView.vue
index 1496f49..646cce6 100644
--- a/frontend/src/views/ActivityDetailView.vue
+++ b/frontend/src/views/ActivityDetailView.vue
@@ -1,39 +1,514 @@
 <script setup lang="ts">
-import { useRoute } from 'vue-router'
+import { onMounted, ref, computed, nextTick } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+import { useActivitiesStore } from '../stores/activities'
+import type { Activity, DataPoint, ZonesResponse, PowerCurveResponse, DiaryEntry } from '../types/models'
 import Card from 'primevue/card'
+import Tag from 'primevue/tag'
+import DataTable from 'primevue/datatable'
+import Column from 'primevue/column'
+import Button from 'primevue/button'
+import Textarea from 'primevue/textarea'
+import Select from 'primevue/select'
+import InputNumber from 'primevue/inputnumber'
+import ProgressSpinner from 'primevue/progressspinner'
+import { use } from 'echarts/core'
+import { CanvasRenderer } from 'echarts/renderers'
+import { LineChart, BarChart } from 'echarts/charts'
+import {
+  TitleComponent, TooltipComponent, LegendComponent, GridComponent, DataZoomComponent, MarkLineComponent,
+} from 'echarts/components'
+import VChart from 'vue-echarts'
+import L from 'leaflet'
+import 'leaflet/dist/leaflet.css'
+
+use([CanvasRenderer, LineChart, BarChart, TitleComponent, TooltipComponent, LegendComponent, GridComponent, DataZoomComponent, MarkLineComponent])
 
 const route = useRoute()
+const router = useRouter()
+const store = useActivitiesStore()
+
+const activity = ref<Activity | null>(null)
+const stream = ref<DataPoint[]>([])
+const zones = ref<ZonesResponse | null>(null)
+const powerCurve = ref<PowerCurveResponse | null>(null)
+const loading = ref(true)
+const aiSummary = ref('')
+const aiLoading = ref(false)
+
+// Diary
+const diary = ref<DiaryEntry>({ rider_notes: null, mood: null, rpe: null, sleep_hours: null })
+const diarySaving = ref(false)
+const diarySaved = ref(false)
+
+const moods = [
+  { label: 'Great', value: 'great' },
+  { label: 'Good', value: 'good' },
+  { label: 'OK', value: 'ok' },
+  { label: 'Tired', value: 'tired' },
+  { label: 'Bad', value: 'bad' },
+]
+
+const hasGps = computed(() => stream.value.some(dp => dp.latitude && dp.longitude))
+const hasAltitude = computed(() => stream.value.some(dp => dp.altitude != null))
+const hasSpeed = computed(() => stream.value.some(dp => dp.speed != null && dp.speed > 0))
+
+function formatDuration(seconds: number): string {
+  const h = Math.floor(seconds / 3600)
+  const m = Math.floor((seconds % 3600) / 60)
+  const s = seconds % 60
+  return h > 0 ? `${h}h ${m}m` : `${m}m ${s}s`
+}
+
+function formatDistance(meters: number | null): string {
+  if (!meters) return '—'
+  return `${(meters / 1000).toFixed(1)} km`
+}
+
+function buildStreamChart() {
+  const times = stream.value.map(dp => new Date(dp.timestamp).toLocaleTimeString('en-GB', { hour: '2-digit', minute: '2-digit', second: '2-digit' }))
+  const powers = stream.value.map(dp => dp.power)
+  const hrs = stream.value.map(dp => dp.heart_rate)
+  const cadences = stream.value.map(dp => dp.cadence)
+
+  return {
+    backgroundColor: 'transparent',
+    tooltip: { trigger: 'axis' },
+    legend: { data: ['Power', 'HR', 'Cadence'], top: 0, textStyle: { color: '#6b7280' } },
+    grid: { left: 50, right: 30, top: 45, bottom: 60 },
+    dataZoom: [{ type: 'inside' }, { type: 'slider', height: 20, bottom: 10 }],
+    xAxis: { type: 'category', data: times, axisLabel: { color: '#666', fontSize: 10 }, show: false },
+    yAxis: [
+      { type: 'value', name: 'Watts', nameTextStyle: { color: '#6b7280' }, axisLabel: { color: '#6b7280' }, splitLine: { lineStyle: { color: '#e5e7eb' } } },
+      { type: 'value', name: 'bpm', nameTextStyle: { color: '#6b7280' }, axisLabel: { color: '#6b7280' }, splitLine: { show: false } },
+    ],
+    series: [
+      { name: 'Power', type: 'line', data: powers, showSymbol: false, lineStyle: { width: 1 }, itemStyle: { color: '#3b82f6' }, areaStyle: { color: 'rgba(59,130,246,0.08)' } },
+      { name: 'HR', type: 'line', yAxisIndex: 1, data: hrs, showSymbol: false, lineStyle: { width: 1 }, itemStyle: { color: '#ef4444' } },
+      { name: 'Cadence', type: 'line', yAxisIndex: 1, data: cadences, showSymbol: false, lineStyle: { width: 1, type: 'dashed' }, itemStyle: { color: '#10b981' } },
+    ],
+  }
+}
+
+function buildElevationChart() {
+  const distances: number[] = []
+  let totalDist = 0
+  for (let i = 0; i < stream.value.length; i++) {
+    if (i > 0 && stream.value[i].speed != null) {
+      totalDist += (stream.value[i].speed || 0)
+    }
+    distances.push(totalDist / 1000)
+  }
+
+  const altitudes = stream.value.map(dp => dp.altitude)
+
+  return {
+    backgroundColor: 'transparent',
+    tooltip: { trigger: 'axis', formatter: (p: any) => `${p[0].name} km: ${p[0].value?.toFixed(0) ?? '—'}m` },
+    grid: { left: 50, right: 20, top: 10, bottom: 25 },
+    xAxis: {
+      type: 'category',
+      data: distances.map(d => d.toFixed(1)),
+      axisLabel: { color: '#6b7280', fontSize: 10, formatter: (v: string) => `${v}` },
+      boundaryGap: false,
+    },
+    yAxis: {
+      type: 'value', name: 'm',
+      nameTextStyle: { color: '#6b7280' },
+      axisLabel: { color: '#6b7280' },
+      splitLine: { lineStyle: { color: '#e5e7eb' } },
+    },
+    series: [{
+      type: 'line',
+      data: altitudes,
+      showSymbol: false,
+      lineStyle: { width: 1.5, color: '#8b5cf6' },
+      areaStyle: {
+        color: {
+          type: 'linear', x: 0, y: 0, x2: 0, y2: 1,
+          colorStops: [
+            { offset: 0, color: 'rgba(139,92,246,0.25)' },
+            { offset: 1, color: 'rgba(139,92,246,0.02)' },
+          ],
+        },
+      },
+    }],
+  }
+}
+
+function buildSpeedChart() {
+  const times = stream.value.map(dp => new Date(dp.timestamp).toLocaleTimeString('en-GB', { hour: '2-digit', minute: '2-digit', second: '2-digit' }))
+  const speeds = stream.value.map(dp => dp.speed != null ? +(dp.speed * 3.6).toFixed(1) : null)
+
+  return {
+    backgroundColor: 'transparent',
+    tooltip: { trigger: 'axis', formatter: (p: any) => `${p[0].value?.toFixed(1) ?? '—'} km/h` },
+    grid: { left: 50, right: 20, top: 10, bottom: 50 },
+    dataZoom: [{ type: 'inside' }, { type: 'slider', height: 20, bottom: 10 }],
+    xAxis: { type: 'category', data: times, show: false },
+    yAxis: {
+      type: 'value', name: 'km/h',
+      nameTextStyle: { color: '#6b7280' },
+      axisLabel: { color: '#6b7280' },
+      splitLine: { lineStyle: { color: '#e5e7eb' } },
+    },
+    series: [{
+      type: 'line',
+      data: speeds,
+      showSymbol: false,
+      lineStyle: { width: 1, color: '#f59e0b' },
+      areaStyle: { color: 'rgba(245,158,11,0.08)' },
+    }],
+  }
+}
+
+function buildZonesChart() {
+  if (!zones.value?.power_zones?.length) return null
+  const z = zones.value.power_zones
+  return {
+    backgroundColor: 'transparent',
+    tooltip: { trigger: 'axis' },
+    grid: { left: 110, right: 30, top: 10, bottom: 10 },
+    xAxis: { type: 'value', axisLabel: { color: '#6b7280', formatter: (v: number) => `${v}%` }, splitLine: { lineStyle: { color: '#e5e7eb' } } },
+    yAxis: { type: 'category', data: z.map(i => `Z${i.zone} ${i.name}`).reverse(), axisLabel: { color: '#6b7280', fontSize: 11 } },
+    series: [{
+      type: 'bar',
+      data: z.map(i => i.percentage).reverse(),
+      itemStyle: {
+        color: (params: any) => {
+          const colors = ['#22c55e', '#3b82f6', '#a855f7', '#f59e0b', '#ef4444', '#dc2626', '#991b1b']
+          return colors[z.length - 1 - params.dataIndex] || '#666'
+        },
+      },
+    }],
+  }
+}
+
+function buildHrZonesChart() {
+  if (!zones.value?.hr_zones?.length) return null
+  const z = zones.value.hr_zones
+  const hrColors = ['#22c55e', '#3b82f6', '#f59e0b', '#ef4444', '#dc2626']
+  return {
+    backgroundColor: 'transparent',
+    tooltip: { trigger: 'axis' },
+    grid: { left: 110, right: 30, top: 10, bottom: 10 },
+    xAxis: { type: 'value', axisLabel: { color: '#6b7280', formatter: (v: number) => `${v}%` }, splitLine: { lineStyle: { color: '#e5e7eb' } } },
+    yAxis: { type: 'category', data: z.map(i => `Z${i.zone} ${i.name}`).reverse(), axisLabel: { color: '#6b7280', fontSize: 11 } },
+    series: [{
+      type: 'bar',
+      data: z.map(i => i.percentage).reverse(),
+      itemStyle: {
+        color: (params: any) => hrColors[z.length - 1 - params.dataIndex] || '#666',
+      },
+    }],
+  }
+}
+
+function buildPowerCurveChart() {
+  if (!powerCurve.value?.curve) return null
+  const entries = Object.entries(powerCurve.value.curve)
+    .map(([dur, pow]) => [Number(dur), pow] as [number, number])
+    .sort((a, b) => a[0] - b[0])
+
+  const labels = entries.map(([d]) => {
+    if (d < 60) return `${d}s`
+    if (d < 3600) return `${d / 60}m`
+    return `${d / 3600}h`
+  })
+
+  return {
+    backgroundColor: 'transparent',
+    tooltip: { trigger: 'axis', formatter: (p: any) => `${p[0].name}: ${p[0].value}W` },
+    grid: { left: 50, right: 30, top: 10, bottom: 30 },
+    xAxis: { type: 'category', data: labels, axisLabel: { color: '#6b7280' } },
+    yAxis: { type: 'value', name: 'W', nameTextStyle: { color: '#6b7280' }, axisLabel: { color: '#6b7280' }, splitLine: { lineStyle: { color: '#e5e7eb' } } },
+    series: [{
+      type: 'line',
+      data: entries.map(([, p]) => p),
+      showSymbol: true,
+      symbolSize: 6,
+      areaStyle: { color: 'rgba(168,85,247,0.12)' },
+      itemStyle: { color: '#a855f7' },
+      lineStyle: { width: 2 },
+    }],
+  }
+}
+
+function initMap() {
+  const gpsPoints = stream.value.filter(dp => dp.latitude && dp.longitude)
+  if (gpsPoints.length < 2) return
+
+  const map = L.map('route-map')
+  L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
+    attribution: '&copy; OpenStreetMap',
+    maxZoom: 18,
+  }).addTo(map)
+
+  const coords: L.LatLngExpression[] = gpsPoints.map(dp => [dp.latitude!, dp.longitude!])
+  const polyline = L.polyline(coords, { color: '#3b82f6', weight: 3, opacity: 0.8 }).addTo(map)
+
+  L.circleMarker(coords[0] as L.LatLngExpression, { radius: 6, color: '#22c55e', fillColor: '#22c55e', fillOpacity: 1 }).addTo(map)
+  L.circleMarker(coords[coords.length - 1] as L.LatLngExpression, { radius: 6, color: '#ef4444', fillColor: '#ef4444', fillOpacity: 1 }).addTo(map)
+
+  map.fitBounds(polyline.getBounds(), { padding: [20, 20] })
+}
+
+async function loadAiSummary() {
+  if (!activity.value || aiSummary.value) return
+  aiLoading.value = true
+  try {
+    aiSummary.value = await store.fetchAiSummary(activity.value.id)
+  } catch {
+    aiSummary.value = 'Failed to generate summary. Check your Gemini API key.'
+  } finally {
+    aiLoading.value = false
+  }
+}
+
+async function saveDiary() {
+  if (!activity.value) return
+  diarySaving.value = true
+  diarySaved.value = false
+  try {
+    diary.value = await store.updateDiary(activity.value.id, diary.value)
+    diarySaved.value = true
+    setTimeout(() => { diarySaved.value = false }, 2000)
+  } finally {
+    diarySaving.value = false
+  }
+}
+
+async function handleDelete() {
+  if (!activity.value) return
+  if (!confirm('Delete this activity? This cannot be undone.')) return
+  await store.deleteActivity(activity.value.id)
+  router.push({ name: 'activities' })
+}
+
+onMounted(async () => {
+  const id = route.params.id as string
+  try {
+    const [act, str, zn, pc, di] = await Promise.all([
+      store.fetchActivity(id),
+      store.fetchStream(id),
+      store.fetchZones(id),
+      store.fetchPowerCurve(id),
+      store.fetchDiary(id),
+    ])
+    activity.value = act
+    stream.value = str
+    zones.value = zn
+    powerCurve.value = pc
+    diary.value = di
+  } finally {
+    loading.value = false
+  }
+
+  // Init map after loading=false triggers DOM render of #route-map
+  if (stream.value.some(dp => dp.latitude && dp.longitude)) {
+    await nextTick()
+    initMap()
+  }
+})
 </script>
 
 <template>
   <div>
-    <h1 class="text-2xl font-semibold mb-6">Activity Detail</h1>
-    <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
-      <Card>
-        <template #title>Power / HR Chart</template>
+    <div v-if="loading" class="flex justify-center py-20">
+      <ProgressSpinner style="width: 50px; height: 50px" />
+    </div>
+
+    <div v-else-if="activity">
+      <!-- Header -->
+      <div class="flex items-center justify-between mb-6">
+        <div class="flex items-center gap-4">
+          <h1 class="text-2xl font-semibold">{{ activity.name || 'Ride' }}</h1>
+          <Tag :value="activity.activity_type" severity="info" />
+        </div>
+        <Button icon="pi pi-trash" severity="danger" text rounded size="small" @click="handleDelete" />
+      </div>
+
+      <!-- Key metrics -->
+      <div class="grid grid-cols-3 md:grid-cols-6 gap-2 md:gap-3 mb-6">
+        <Card>
+          <template #content>
+            <p class="text-surface-500 text-xs uppercase">Duration</p>
+            <p class="text-lg font-bold">{{ formatDuration(activity.duration) }}</p>
+          </template>
+        </Card>
+        <Card>
+          <template #content>
+            <p class="text-surface-500 text-xs uppercase">Distance</p>
+            <p class="text-lg font-bold">{{ formatDistance(activity.distance) }}</p>
+          </template>
+        </Card>
+        <Card v-if="activity.metrics?.avg_power">
+          <template #content>
+            <p class="text-surface-500 text-xs uppercase">Avg / NP</p>
+            <p class="text-lg font-bold">{{ activity.metrics.avg_power }} / {{ activity.metrics.normalized_power }}W</p>
+          </template>
+        </Card>
+        <Card v-if="activity.metrics?.tss">
+          <template #content>
+            <p class="text-surface-500 text-xs uppercase">TSS / IF</p>
+            <p class="text-lg font-bold">{{ activity.metrics.tss }} / {{ activity.metrics.intensity_factor }}</p>
+          </template>
+        </Card>
+        <Card v-if="activity.metrics?.avg_hr">
+          <template #content>
+            <p class="text-surface-500 text-xs uppercase">Avg / Max HR</p>
+            <p class="text-lg font-bold">{{ activity.metrics.avg_hr }} / {{ activity.metrics.max_hr }}</p>
+          </template>
+        </Card>
+        <Card v-if="activity.elevation_gain">
+          <template #content>
+            <p class="text-surface-500 text-xs uppercase">Elevation</p>
+            <p class="text-lg font-bold">{{ activity.elevation_gain }}m</p>
+          </template>
+        </Card>
+      </div>
+
+      <!-- AI Summary -->
+      <Card class="mb-6">
+        <template #title>
+          <div class="flex items-center gap-2">
+            <i class="pi pi-sparkles text-primary"></i>
+            AI Coach Summary
+          </div>
+        </template>
         <template #content>
-          <p class="text-surface-400">ECharts — coming soon</p>
+          <div v-if="aiSummary" v-html="aiSummary" class="text-surface-700 leading-relaxed whitespace-pre-line"></div>
+          <div v-else-if="aiLoading" class="flex items-center gap-3">
+            <ProgressSpinner style="width: 20px; height: 20px" />
+            <span class="text-surface-500 text-sm">Analyzing your ride...</span>
+          </div>
+          <div v-else>
+            <Button label="Generate AI Analysis" icon="pi pi-sparkles" severity="secondary" outlined size="small" @click="loadAiSummary" />
+          </div>
         </template>
       </Card>
-      <Card>
-        <template #title>Route Map</template>
+
+      <!-- Route Map -->
+      <Card v-if="hasGps" class="mb-6">
+        <template #title>Route</template>
         <template #content>
-          <p class="text-surface-400">Leaflet map — coming soon</p>
+          <div id="route-map" style="height: 350px; border-radius: 8px;"></div>
         </template>
       </Card>
-      <Card>
-        <template #title>Metrics</template>
+
+      <!-- Elevation Profile -->
+      <Card v-if="hasAltitude" class="mb-6">
+        <template #title>Elevation Profile</template>
         <template #content>
-          <p class="text-surface-400">NP, IF, TSS, zones — coming soon</p>
+          <VChart :option="buildElevationChart()" style="height: 200px" autoresize />
         </template>
       </Card>
-      <Card>
+
+      <!-- Speed Profile -->
+      <Card v-if="hasSpeed" class="mb-6">
+        <template #title>Speed</template>
+        <template #content>
+          <VChart :option="buildSpeedChart()" style="height: 200px" autoresize />
+        </template>
+      </Card>
+
+      <!-- Power/HR/Cadence chart -->
+      <Card v-if="stream.length > 0" class="mb-6">
+        <template #title>Power / HR / Cadence</template>
+        <template #content>
+          <VChart :option="buildStreamChart()" style="height: 300px" autoresize />
+        </template>
+      </Card>
+
+      <div class="grid grid-cols-1 md:grid-cols-2 gap-6 mb-6">
+        <!-- Power zones -->
+        <Card v-if="zones?.power_zones?.length">
+          <template #title>Power Zones</template>
+          <template #content>
+            <VChart :option="buildZonesChart()" style="height: 250px" autoresize />
+          </template>
+        </Card>
+
+        <!-- HR zones -->
+        <Card v-if="zones?.hr_zones?.length">
+          <template #title>Heart Rate Zones</template>
+          <template #content>
+            <VChart :option="buildHrZonesChart()" style="height: 200px" autoresize />
+          </template>
+        </Card>
+
+        <!-- Power curve -->
+        <Card v-if="powerCurve?.curve && Object.keys(powerCurve.curve).length > 0">
+          <template #title>Power Curve</template>
+          <template #content>
+            <VChart :option="buildPowerCurveChart()" style="height: 250px" autoresize />
+          </template>
+        </Card>
+      </div>
+
+      <!-- Intervals table -->
+      <Card v-if="activity.intervals?.length" class="mb-6">
         <template #title>Intervals</template>
         <template #content>
-          <p class="text-surface-400">Detected intervals table — coming soon</p>
+          <DataTable :value="activity.intervals" size="small" stripedRows>
+            <Column field="interval_type" header="Type">
+              <template #body="{ data }">
+                <Tag :value="data.interval_type" :severity="data.interval_type === 'work' ? 'danger' : 'success'" />
+              </template>
+            </Column>
+            <Column header="Duration">
+              <template #body="{ data }">{{ formatDuration(data.duration || 0) }}</template>
+            </Column>
+            <Column field="avg_power" header="Avg Power">
+              <template #body="{ data }">{{ data.avg_power ? `${data.avg_power}W` : '—' }}</template>
+            </Column>
+            <Column field="avg_hr" header="Avg HR">
+              <template #body="{ data }">{{ data.avg_hr ? `${data.avg_hr}bpm` : '—' }}</template>
+            </Column>
+          </DataTable>
+        </template>
+      </Card>
+
+      <!-- Training Diary -->
+      <Card class="mb-6">
+        <template #title>
+          <div class="flex items-center gap-2">
+            <i class="pi pi-book text-primary"></i>
+            Training Diary
+          </div>
+        </template>
+        <template #content>
+          <div class="grid grid-cols-1 md:grid-cols-3 gap-4 mb-4">
+            <div>
+              <label class="text-surface-500 text-xs uppercase font-medium mb-1 block">Mood</label>
+              <Select
+                v-model="diary.mood"
+                :options="moods"
+                option-label="label"
+                option-value="value"
+                placeholder="How did you feel?"
+                class="w-full"
+              />
+            </div>
+            <div>
+              <label class="text-surface-500 text-xs uppercase font-medium mb-1 block">RPE (1-10)</label>
+              <InputNumber v-model="diary.rpe" :min="1" :max="10" class="w-full" placeholder="Rate of Perceived Exertion" />
+            </div>
+            <div>
+              <label class="text-surface-500 text-xs uppercase font-medium mb-1 block">Sleep (hours)</label>
+              <InputNumber v-model="diary.sleep_hours" :min="0" :max="24" :max-fraction-digits="1" class="w-full" placeholder="Hours slept" />
+            </div>
+          </div>
+          <div class="mb-4">
+            <label class="text-surface-500 text-xs uppercase font-medium mb-1 block">Notes</label>
+            <Textarea v-model="diary.rider_notes" rows="3" class="w-full" placeholder="How was the ride? Any observations..." />
+          </div>
+          <div class="flex items-center gap-3">
+            <Button label="Save" icon="pi pi-check" size="small" :loading="diarySaving" @click="saveDiary" />
+            <span v-if="diarySaved" class="text-green-600 text-sm">Saved!</span>
+          </div>
         </template>
       </Card>
     </div>
-    <p class="text-surface-500 text-sm mt-4">ID: {{ route.params.id }}</p>
   </div>
 </template>
diff --git a/frontend/src/views/CoachView.vue b/frontend/src/views/CoachView.vue
new file mode 100644
index 0000000..d1ce3fc
--- /dev/null
+++ b/frontend/src/views/CoachView.vue
@@ -0,0 +1,410 @@
+<script setup lang="ts">
+import { onMounted, ref, computed, nextTick } from 'vue'
+import { useCoachingStore } from '../stores/coaching'
+import { useAuthStore } from '../stores/auth'
+import type { ChatMessage, TrainingPlan, ComplianceWeek, TodayWorkout } from '../types/models'
+import Card from 'primevue/card'
+import Button from 'primevue/button'
+import InputText from 'primevue/inputtext'
+import Tag from 'primevue/tag'
+import ProgressBar from 'primevue/progressbar'
+
+const coaching = useCoachingStore()
+const auth = useAuthStore()
+
+const activeTab = ref<'chat' | 'plan' | 'progress'>('chat')
+const messageInput = ref('')
+const messagesContainer = ref<HTMLElement | null>(null)
+const compliance = ref<ComplianceWeek[]>([])
+
+const messages = computed<ChatMessage[]>(() => coaching.currentChat?.messages || [])
+const plan = computed<TrainingPlan | null>(() => coaching.activePlan)
+const todayWorkout = computed<TodayWorkout | null>(() => coaching.todayWorkout)
+const onboardingCompleted = ref(false)
+const chatReady = ref(false)
+
+function scrollToBottom() {
+  nextTick(() => {
+    if (messagesContainer.value) {
+      messagesContainer.value.scrollTop = messagesContainer.value.scrollHeight
+    }
+  })
+}
+
+async function sendMessage() {
+  const text = messageInput.value.trim()
+  if (!text || !coaching.currentChat?.chat_id) return
+
+  messageInput.value = ''
+  await coaching.sendMessage(coaching.currentChat.chat_id, text)
+  scrollToBottom()
+
+  // Check if onboarding just completed
+  if (coaching.currentChat?.onboarding_completed && !onboardingCompleted.value) {
+    onboardingCompleted.value = true
+    await auth.fetchRider()
+  }
+}
+
+async function handleKeydown(e: KeyboardEvent) {
+  if (e.key === 'Enter' && !e.shiftKey) {
+    e.preventDefault()
+    await sendMessage()
+  }
+}
+
+async function startNewChat() {
+  await coaching.createChat()
+  scrollToBottom()
+}
+
+async function handleGeneratePlan() {
+  await coaching.generatePlan()
+  if (coaching.activePlan) {
+    activeTab.value = 'plan'
+    await loadCompliance()
+  }
+}
+
+async function handleAdjustPlan() {
+  await coaching.startPlanAdjustment()
+  activeTab.value = 'chat'
+  scrollToBottom()
+}
+
+async function loadCompliance() {
+  if (plan.value?.id) {
+    try {
+      compliance.value = await coaching.fetchCompliance(plan.value.id)
+    } catch { /* no compliance data */ }
+  }
+}
+
+function workoutTypeColor(type: string): string {
+  const colors: Record<string, string> = {
+    rest: 'secondary',
+    recovery: 'secondary',
+    endurance: 'info',
+    tempo: 'warn',
+    sweetspot: 'warn',
+    threshold: 'danger',
+    vo2max: 'danger',
+    sprint: 'contrast',
+    race: 'contrast',
+  }
+  return colors[type] || 'info'
+}
+
+function workoutTypeLabel(type: string): string {
+  const labels: Record<string, string> = {
+    rest: 'Отдых',
+    recovery: 'Восстановление',
+    endurance: 'Выносливость',
+    tempo: 'Темпо',
+    sweetspot: 'Sweet Spot',
+    threshold: 'Порог',
+    vo2max: 'VO2max',
+    sprint: 'Спринт',
+    race: 'Гонка',
+  }
+  return labels[type] || type
+}
+
+function dayLabel(day: string): string {
+  const labels: Record<string, string> = {
+    monday: 'Пн',
+    tuesday: 'Вт',
+    wednesday: 'Ср',
+    thursday: 'Чт',
+    friday: 'Пт',
+    saturday: 'Сб',
+    sunday: 'Вс',
+  }
+  return labels[day] || day
+}
+
+onMounted(async () => {
+  // Check onboarding status
+  try {
+    const status = await coaching.getOnboardingStatus()
+    onboardingCompleted.value = status.onboarding_completed
+
+    if (!status.onboarding_completed) {
+      // Start or resume onboarding
+      await coaching.startOnboarding()
+      chatReady.value = true
+      scrollToBottom()
+    } else {
+      // Load active plan
+      await coaching.fetchActivePlan()
+      await coaching.fetchTodayWorkout()
+
+      if (plan.value) {
+        await loadCompliance()
+      }
+
+      // Start a general chat
+      await coaching.createChat()
+      chatReady.value = true
+    }
+  } catch {
+    chatReady.value = true
+  }
+})
+</script>
+
+<template>
+  <div>
+    <div class="flex items-center justify-between mb-6">
+      <h1 class="text-2xl font-semibold">AI Тренер</h1>
+      <div v-if="onboardingCompleted" class="flex gap-2">
+        <Button
+          :label="activeTab === 'chat' ? '' : 'Чат'"
+          icon="pi pi-comments"
+          :severity="activeTab === 'chat' ? 'primary' : 'secondary'"
+          :text="activeTab !== 'chat'"
+          size="small"
+          @click="activeTab = 'chat'"
+        />
+        <Button
+          :label="activeTab === 'plan' ? '' : 'План'"
+          icon="pi pi-calendar"
+          :severity="activeTab === 'plan' ? 'primary' : 'secondary'"
+          :text="activeTab !== 'plan'"
+          size="small"
+          @click="activeTab = 'plan'"
+        />
+        <Button
+          :label="activeTab === 'progress' ? '' : 'Прогресс'"
+          icon="pi pi-chart-bar"
+          :severity="activeTab === 'progress' ? 'primary' : 'secondary'"
+          :text="activeTab !== 'progress'"
+          size="small"
+          @click="activeTab = 'progress'"
+        />
+      </div>
+    </div>
+
+    <!-- Today's workout card -->
+    <Card v-if="todayWorkout && onboardingCompleted" class="mb-6 border-l-4 border-l-primary">
+      <template #content>
+        <div class="flex items-center justify-between">
+          <div>
+            <p class="text-surface-500 text-xs uppercase mb-1">Тренировка на сегодня</p>
+            <p class="text-lg font-bold">{{ todayWorkout.title }}</p>
+            <p class="text-surface-600 text-sm mt-1">{{ todayWorkout.description }}</p>
+          </div>
+          <div class="flex items-center gap-3">
+            <Tag :value="workoutTypeLabel(todayWorkout.workout_type)" :severity="workoutTypeColor(todayWorkout.workout_type)" />
+            <div v-if="todayWorkout.duration_minutes" class="text-right">
+              <p class="text-sm text-surface-500">{{ todayWorkout.duration_minutes }} мин</p>
+              <p v-if="todayWorkout.target_tss" class="text-xs text-surface-400">TSS {{ todayWorkout.target_tss }}</p>
+            </div>
+          </div>
+        </div>
+      </template>
+    </Card>
+
+    <!-- Onboarding banner -->
+    <Card v-if="!onboardingCompleted && chatReady" class="mb-4 bg-blue-50 border-blue-200">
+      <template #content>
+        <div class="flex items-center gap-3">
+          <i class="pi pi-info-circle text-blue-500 text-xl"></i>
+          <div>
+            <p class="font-semibold text-blue-800">Интервью с тренером</p>
+            <p class="text-blue-600 text-sm">Ответьте на несколько вопросов, чтобы AI тренер мог создать персональный план тренировок.</p>
+          </div>
+        </div>
+      </template>
+    </Card>
+
+    <!-- Chat Tab -->
+    <div v-if="activeTab === 'chat'" class="flex flex-col" style="height: calc(100vh - 300px); min-height: 400px;">
+      <!-- Chat actions -->
+      <div v-if="onboardingCompleted" class="flex gap-2 mb-3">
+        <Button label="Новый чат" icon="pi pi-plus" size="small" severity="secondary" outlined @click="startNewChat" />
+        <Button v-if="!plan" label="Сгенерировать план" icon="pi pi-bolt" size="small" severity="primary" :loading="coaching.loading" @click="handleGeneratePlan" />
+        <Button v-if="plan" label="Корректировать план" icon="pi pi-pencil" size="small" severity="warn" outlined @click="handleAdjustPlan" />
+      </div>
+
+      <!-- Messages -->
+      <div ref="messagesContainer" class="flex-1 overflow-y-auto space-y-3 p-4 bg-surface-50 rounded-xl border border-surface-200">
+        <div v-if="coaching.loading && messages.length === 0" class="flex items-center justify-center h-full text-surface-400">
+          <i class="pi pi-spin pi-spinner text-2xl mr-2"></i>
+          Загрузка...
+        </div>
+
+        <div v-for="(msg, i) in messages" :key="i" :class="['flex', msg.role === 'user' ? 'justify-end' : 'justify-start']">
+          <div
+            :class="[
+              'max-w-[80%] md:max-w-[70%] rounded-2xl px-4 py-3 text-sm leading-relaxed',
+              msg.role === 'user'
+                ? 'bg-primary text-white rounded-br-md'
+                : 'bg-white border border-surface-200 text-surface-800 rounded-bl-md shadow-sm'
+            ]"
+          >
+            <div v-if="msg.role === 'model'" class="flex items-center gap-2 mb-1">
+              <span class="text-xs font-semibold text-primary">VeloBrain</span>
+            </div>
+            <div class="whitespace-pre-wrap" v-html="formatMessage(msg.text)"></div>
+          </div>
+        </div>
+
+        <div v-if="coaching.sending" class="flex justify-start">
+          <div class="bg-white border border-surface-200 rounded-2xl rounded-bl-md px-4 py-3 shadow-sm">
+            <div class="flex items-center gap-2 text-surface-400 text-sm">
+              <i class="pi pi-spin pi-spinner"></i>
+              Думаю...
+            </div>
+          </div>
+        </div>
+      </div>
+
+      <!-- Input -->
+      <div class="flex gap-2 mt-3">
+        <InputText
+          v-model="messageInput"
+          :placeholder="onboardingCompleted ? 'Задайте вопрос тренеру...' : 'Ваш ответ...'"
+          class="flex-1"
+          :disabled="coaching.sending"
+          @keydown="handleKeydown"
+        />
+        <Button
+          icon="pi pi-send"
+          :disabled="!messageInput.trim() || coaching.sending"
+          @click="sendMessage"
+        />
+      </div>
+    </div>
+
+    <!-- Plan Tab -->
+    <div v-if="activeTab === 'plan'">
+      <div v-if="!plan" class="text-center py-12">
+        <i class="pi pi-calendar text-4xl text-surface-300 mb-4"></i>
+        <p class="text-surface-500 mb-4">План тренировок ещё не создан</p>
+        <Button label="Сгенерировать план" icon="pi pi-bolt" :loading="coaching.loading" @click="handleGeneratePlan" />
+      </div>
+
+      <div v-else>
+        <!-- Plan header -->
+        <Card class="mb-6">
+          <template #content>
+            <div class="flex flex-col md:flex-row md:items-center md:justify-between gap-4">
+              <div>
+                <h2 class="text-xl font-bold">{{ plan.goal }}</h2>
+                <p class="text-surface-500 text-sm mt-1">{{ plan.description }}</p>
+                <div class="flex items-center gap-3 mt-2">
+                  <Tag :value="plan.phase || 'base'" severity="info" />
+                  <span class="text-sm text-surface-500">
+                    {{ new Date(plan.start_date).toLocaleDateString('ru-RU') }} —
+                    {{ new Date(plan.end_date).toLocaleDateString('ru-RU') }}
+                  </span>
+                </div>
+              </div>
+              <div class="flex gap-2">
+                <Button label="Корректировать" icon="pi pi-pencil" size="small" severity="warn" outlined @click="handleAdjustPlan" />
+                <Button label="Новый план" icon="pi pi-refresh" size="small" severity="secondary" outlined :loading="coaching.loading" @click="handleGeneratePlan" />
+              </div>
+            </div>
+          </template>
+        </Card>
+
+        <!-- Weeks -->
+        <div v-for="week in plan.weeks" :key="week.week_number" class="mb-6">
+          <div class="flex items-center justify-between mb-3">
+            <h3 class="font-semibold text-lg">Неделя {{ week.week_number }}</h3>
+            <div class="flex items-center gap-3 text-sm text-surface-500">
+              <span>{{ week.focus }}</span>
+              <span v-if="week.target_tss">TSS {{ week.target_tss }}</span>
+              <span v-if="week.target_hours">{{ week.target_hours }}ч</span>
+            </div>
+          </div>
+
+          <div class="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-3">
+            <Card v-for="day in week.days" :key="day.day" class="!shadow-none border border-surface-200">
+              <template #content>
+                <div class="flex items-center justify-between mb-2">
+                  <span class="text-sm font-semibold text-surface-600">{{ dayLabel(day.day) }}</span>
+                  <Tag :value="workoutTypeLabel(day.workout_type)" :severity="workoutTypeColor(day.workout_type)" class="text-xs" />
+                </div>
+                <p class="font-medium text-sm">{{ day.title }}</p>
+                <p v-if="day.description" class="text-xs text-surface-500 mt-1">{{ day.description }}</p>
+                <div v-if="day.duration_minutes > 0" class="flex items-center gap-3 mt-2 text-xs text-surface-400">
+                  <span>{{ day.duration_minutes }} мин</span>
+                  <span v-if="day.target_tss">TSS {{ day.target_tss }}</span>
+                  <span v-if="day.target_if">IF {{ day.target_if }}</span>
+                </div>
+              </template>
+            </Card>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <!-- Progress Tab -->
+    <div v-if="activeTab === 'progress'">
+      <div v-if="compliance.length === 0" class="text-center py-12">
+        <i class="pi pi-chart-bar text-4xl text-surface-300 mb-4"></i>
+        <p class="text-surface-500">Нет данных о прогрессе</p>
+      </div>
+
+      <div v-else class="space-y-4">
+        <Card v-for="week in compliance" :key="week.week_number">
+          <template #content>
+            <div class="flex flex-col md:flex-row md:items-center md:justify-between gap-4">
+              <div class="flex-1">
+                <div class="flex items-center gap-3 mb-2">
+                  <h3 class="font-semibold">Неделя {{ week.week_number }}</h3>
+                  <Tag
+                    :value="week.status === 'upcoming' ? 'Впереди' : week.status === 'current' ? 'Текущая' : 'Завершена'"
+                    :severity="week.status === 'upcoming' ? 'secondary' : week.status === 'current' ? 'info' : 'success'"
+                    class="text-xs"
+                  />
+                  <span class="text-sm text-surface-500">{{ week.focus }}</span>
+                </div>
+
+                <div class="mb-2">
+                  <div class="flex items-center justify-between text-sm mb-1">
+                    <span class="text-surface-500">Выполнение</span>
+                    <span class="font-semibold">{{ week.adherence_pct }}%</span>
+                  </div>
+                  <ProgressBar
+                    :value="week.adherence_pct"
+                    :showValue="false"
+                    style="height: 8px"
+                    :class="week.adherence_pct >= 80 ? '' : week.adherence_pct >= 50 ? '[&_.p-progressbar-value]:!bg-amber-500' : '[&_.p-progressbar-value]:!bg-red-500'"
+                  />
+                </div>
+              </div>
+
+              <div class="grid grid-cols-3 gap-4 text-center text-sm">
+                <div>
+                  <p class="text-surface-500 text-xs">Тренировки</p>
+                  <p class="font-semibold">{{ week.actual_rides }}/{{ week.planned_rides }}</p>
+                </div>
+                <div>
+                  <p class="text-surface-500 text-xs">TSS</p>
+                  <p class="font-semibold">{{ week.actual_tss }}/{{ week.planned_tss }}</p>
+                </div>
+                <div>
+                  <p class="text-surface-500 text-xs">Часы</p>
+                  <p class="font-semibold">{{ week.actual_hours }}/{{ week.planned_hours }}</p>
+                </div>
+              </div>
+            </div>
+          </template>
+        </Card>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script lang="ts">
+function formatMessage(text: string): string {
+  // Strip [ONBOARDING_COMPLETE] and JSON blocks from display
+  let cleaned = text.replace(/\[ONBOARDING_COMPLETE\]/g, '')
+  cleaned = cleaned.replace(/```json[\s\S]*?```/g, '')
+  cleaned = cleaned.replace(/\[PLAN_ADJUSTED\]/g, '')
+  return cleaned.trim()
+}
+</script>
diff --git a/frontend/src/views/DashboardView.vue b/frontend/src/views/DashboardView.vue
index d4d8a65..81df158 100644
--- a/frontend/src/views/DashboardView.vue
+++ b/frontend/src/views/DashboardView.vue
@@ -1,27 +1,318 @@
 <script setup lang="ts">
+import { onMounted, computed, ref } from 'vue'
+import { useAuthStore } from '../stores/auth'
+import { useActivitiesStore } from '../stores/activities'
+import { useCoachingStore } from '../stores/coaching'
+import type { FitnessEntry, WeeklyStats, PersonalRecord, TodayWorkout } from '../types/models'
 import Card from 'primevue/card'
+import Tag from 'primevue/tag'
+import Button from 'primevue/button'
+import { useRouter } from 'vue-router'
+import { use } from 'echarts/core'
+import { CanvasRenderer } from 'echarts/renderers'
+import { LineChart, BarChart } from 'echarts/charts'
+import {
+  TooltipComponent, LegendComponent, GridComponent,
+} from 'echarts/components'
+import VChart from 'vue-echarts'
+
+use([CanvasRenderer, LineChart, BarChart, TooltipComponent, LegendComponent, GridComponent])
+
+const auth = useAuthStore()
+const store = useActivitiesStore()
+const coaching = useCoachingStore()
+const router = useRouter()
+
+const recentActivities = computed(() => store.activities.slice(0, 5))
+const fitness = ref<FitnessEntry[]>([])
+const weeklyStats = ref<WeeklyStats[]>([])
+const records = ref<PersonalRecord[]>([])
+const todayWorkout = ref<TodayWorkout | null>(null)
+
+function formatDurationLabel(seconds: number): string {
+  if (seconds < 60) return `${seconds}s`
+  if (seconds < 3600) return `${seconds / 60}m`
+  return `${seconds / 3600}h`
+}
+
+function formatDuration(seconds: number): string {
+  const h = Math.floor(seconds / 3600)
+  const m = Math.floor((seconds % 3600) / 60)
+  return h > 0 ? `${h}h ${m}m` : `${m}m`
+}
+
+function formatDistance(meters: number | null): string {
+  if (!meters) return '—'
+  return `${(meters / 1000).toFixed(1)} km`
+}
+
+function formatDate(iso: string): string {
+  return new Date(iso).toLocaleDateString('en-GB', { day: 'numeric', month: 'short', year: 'numeric' })
+}
+
+function buildFitnessChart() {
+  if (fitness.value.length === 0) return null
+
+  const dates = fitness.value.map(e => e.date)
+  const ctlData = fitness.value.map(e => e.ctl)
+  const atlData = fitness.value.map(e => e.atl)
+  const tsbData = fitness.value.map(e => e.tsb)
+
+  return {
+    backgroundColor: 'transparent',
+    tooltip: {
+      trigger: 'axis',
+      formatter: (params: any) => {
+        const date = params[0].name
+        return `<b>${date}</b><br/>` +
+          params.map((p: any) => `${p.marker} ${p.seriesName}: <b>${p.value.toFixed(1)}</b>`).join('<br/>')
+      },
+    },
+    legend: { data: ['Fitness (CTL)', 'Fatigue (ATL)', 'Form (TSB)'], top: 0, textStyle: { color: '#6b7280', fontSize: 11 } },
+    grid: { left: 40, right: 20, top: 40, bottom: 30 },
+    xAxis: {
+      type: 'category',
+      data: dates,
+      axisLabel: { color: '#6b7280', fontSize: 10, formatter: (v: string) => { const d = new Date(v); return `${d.getDate()}/${d.getMonth() + 1}` } },
+      splitLine: { show: false },
+    },
+    yAxis: { type: 'value', axisLabel: { color: '#6b7280' }, splitLine: { lineStyle: { color: '#e5e7eb' } } },
+    series: [
+      { name: 'Fitness (CTL)', type: 'line', data: ctlData, showSymbol: false, lineStyle: { width: 2 }, itemStyle: { color: '#3b82f6' } },
+      { name: 'Fatigue (ATL)', type: 'line', data: atlData, showSymbol: false, lineStyle: { width: 2 }, itemStyle: { color: '#ef4444' } },
+      {
+        name: 'Form (TSB)', type: 'line', data: tsbData, showSymbol: false, lineStyle: { width: 2 }, itemStyle: { color: '#10b981' },
+        areaStyle: {
+          color: {
+            type: 'linear', x: 0, y: 0, x2: 0, y2: 1,
+            colorStops: [
+              { offset: 0, color: 'rgba(16,185,129,0.15)' },
+              { offset: 0.5, color: 'rgba(16,185,129,0)' },
+              { offset: 0.5, color: 'rgba(239,68,68,0)' },
+              { offset: 1, color: 'rgba(239,68,68,0.1)' },
+            ],
+          },
+        },
+      },
+    ],
+  }
+}
+
+function buildWeeklyChart() {
+  if (weeklyStats.value.length === 0) return null
+
+  const weeks = weeklyStats.value.map(w => {
+    const d = new Date(w.week)
+    return `${d.getDate()}/${d.getMonth() + 1}`
+  })
+
+  return {
+    backgroundColor: 'transparent',
+    tooltip: {
+      trigger: 'axis',
+      formatter: (params: any) => {
+        const week = params[0].name
+        return `<b>Week of ${week}</b><br/>` +
+          params.map((p: any) => `${p.marker} ${p.seriesName}: <b>${p.value}</b>`).join('<br/>')
+      },
+    },
+    legend: { data: ['Distance (km)', 'TSS', 'Hours'], top: 0, textStyle: { color: '#6b7280', fontSize: 11 } },
+    grid: { left: 40, right: 40, top: 40, bottom: 30 },
+    xAxis: { type: 'category', data: weeks, axisLabel: { color: '#6b7280', fontSize: 10 } },
+    yAxis: [
+      { type: 'value', axisLabel: { color: '#6b7280' }, splitLine: { lineStyle: { color: '#e5e7eb' } } },
+      { type: 'value', axisLabel: { color: '#6b7280' }, splitLine: { show: false } },
+    ],
+    series: [
+      {
+        name: 'Distance (km)', type: 'bar', data: weeklyStats.value.map(w => w.distance),
+        itemStyle: { color: '#3b82f6', borderRadius: [4, 4, 0, 0] }, barMaxWidth: 30,
+      },
+      {
+        name: 'TSS', type: 'bar', data: weeklyStats.value.map(w => w.tss),
+        itemStyle: { color: '#a855f7', borderRadius: [4, 4, 0, 0] }, barMaxWidth: 30,
+      },
+      {
+        name: 'Hours', type: 'line', yAxisIndex: 1,
+        data: weeklyStats.value.map(w => +(w.duration / 3600).toFixed(1)),
+        showSymbol: true, symbolSize: 6, itemStyle: { color: '#10b981' }, lineStyle: { width: 2 },
+      },
+    ],
+  }
+}
+
+onMounted(async () => {
+  store.fetchActivities(5)
+  try {
+    fitness.value = await store.fetchFitness(90)
+  } catch {
+    // Fitness data may not be available yet
+  }
+  try {
+    weeklyStats.value = await store.fetchWeeklyStats(8)
+  } catch {
+    // Weekly stats may not be available yet
+  }
+  try {
+    records.value = await store.fetchPersonalRecords()
+  } catch {
+    // PR data may not be available yet
+  }
+  try {
+    todayWorkout.value = await coaching.fetchTodayWorkout()
+  } catch {
+    // No active plan
+  }
+})
 </script>
 
 <template>
   <div>
     <h1 class="text-2xl font-semibold mb-6">Dashboard</h1>
-    <div class="grid grid-cols-1 md:grid-cols-3 gap-4">
+
+    <!-- Rider stats cards -->
+    <div class="grid grid-cols-2 md:grid-cols-4 gap-3 md:gap-4 mb-8">
       <Card>
-        <template #title>Current Form</template>
         <template #content>
-          <p class="text-surface-400">CTL / ATL / TSB — coming soon</p>
+          <p class="text-surface-500 text-xs uppercase mb-1">FTP</p>
+          <p class="text-2xl font-bold">{{ auth.rider?.ftp ?? '—' }} <span class="text-sm text-surface-500 font-normal">W</span></p>
         </template>
       </Card>
       <Card>
-        <template #title>Weekly Load</template>
         <template #content>
-          <p class="text-surface-400">Weekly TSS summary — coming soon</p>
+          <p class="text-surface-500 text-xs uppercase mb-1">Weight</p>
+          <p class="text-2xl font-bold">{{ auth.rider?.weight ?? '—' }} <span class="text-sm text-surface-500 font-normal">kg</span></p>
         </template>
       </Card>
       <Card>
-        <template #title>Recent Rides</template>
         <template #content>
-          <p class="text-surface-400">Last 5 activities — coming soon</p>
+          <p class="text-surface-500 text-xs uppercase mb-1">W/kg</p>
+          <p class="text-2xl font-bold">
+            {{ auth.rider?.ftp && auth.rider?.weight ? (auth.rider.ftp / auth.rider.weight).toFixed(2) : '—' }}
+          </p>
+        </template>
+      </Card>
+      <Card>
+        <template #content>
+          <p class="text-surface-500 text-xs uppercase mb-1">Total Rides</p>
+          <p class="text-2xl font-bold">{{ store.total }}</p>
+        </template>
+      </Card>
+    </div>
+
+    <!-- Today's Workout -->
+    <Card v-if="todayWorkout" class="mb-8 border-l-4 border-l-primary cursor-pointer hover:shadow-md transition-shadow" @click="router.push({ name: 'coach' })">
+      <template #content>
+        <div class="flex items-center justify-between">
+          <div>
+            <div class="flex items-center gap-2 mb-1">
+              <i class="pi pi-bolt text-primary"></i>
+              <p class="text-surface-500 text-xs uppercase">Тренировка на сегодня</p>
+            </div>
+            <p class="text-lg font-bold">{{ todayWorkout.title }}</p>
+            <p v-if="todayWorkout.description" class="text-surface-500 text-sm mt-1 line-clamp-2">{{ todayWorkout.description }}</p>
+          </div>
+          <div class="flex items-center gap-3">
+            <Tag :value="todayWorkout.workout_type" severity="info" />
+            <div v-if="todayWorkout.duration_minutes" class="text-right">
+              <p class="text-sm font-semibold">{{ todayWorkout.duration_minutes }} мин</p>
+              <p v-if="todayWorkout.target_tss" class="text-xs text-surface-400">TSS {{ todayWorkout.target_tss }}</p>
+            </div>
+            <i class="pi pi-chevron-right text-surface-300"></i>
+          </div>
+        </div>
+      </template>
+    </Card>
+
+    <!-- Personal Records -->
+    <Card v-if="records.length > 0" class="mb-8">
+      <template #title>
+        <div class="flex items-center gap-2">
+          <i class="pi pi-trophy text-amber-500"></i>
+          Personal Records
+        </div>
+      </template>
+      <template #content>
+        <div class="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-6 gap-3">
+          <div
+            v-for="pr in records"
+            :key="pr.duration"
+            class="bg-surface-50 rounded-lg p-3 text-center border border-surface-200 cursor-pointer hover:border-primary transition-colors"
+            @click="router.push({ name: 'activity-detail', params: { id: pr.activity_id } })"
+          >
+            <p class="text-surface-500 text-xs uppercase mb-1">{{ formatDurationLabel(pr.duration) }}</p>
+            <p class="text-xl font-bold">{{ pr.power }}<span class="text-sm font-normal text-surface-500">W</span></p>
+            <p v-if="auth.rider?.weight" class="text-xs text-surface-400">{{ (pr.power / auth.rider.weight).toFixed(1) }} W/kg</p>
+          </div>
+        </div>
+      </template>
+    </Card>
+
+    <!-- Fitness trend chart -->
+    <Card v-if="fitness.length > 0" class="mb-8">
+      <template #title>Fitness Trend</template>
+      <template #content>
+        <VChart :option="buildFitnessChart()" style="height: 280px" autoresize />
+        <div class="flex items-center justify-center gap-6 mt-2 text-xs text-surface-500">
+          <span>CTL: chronic training load (fitness)</span>
+          <span>ATL: acute training load (fatigue)</span>
+          <span>TSB: training stress balance (form)</span>
+        </div>
+      </template>
+    </Card>
+
+    <!-- Weekly summary -->
+    <Card v-if="weeklyStats.length > 0" class="mb-8">
+      <template #title>Weekly Summary</template>
+      <template #content>
+        <VChart :option="buildWeeklyChart()" style="height: 280px" autoresize />
+      </template>
+    </Card>
+
+    <!-- Recent rides -->
+    <h2 class="text-lg font-semibold mb-4">Recent Rides</h2>
+    <div v-if="recentActivities.length === 0" class="text-surface-500">
+      No activities yet. Upload your first .FIT file!
+    </div>
+    <div v-else class="flex flex-col gap-3">
+      <Card
+        v-for="a in recentActivities"
+        :key="a.id"
+        class="cursor-pointer hover:border-primary transition-colors"
+        @click="router.push({ name: 'activity-detail', params: { id: a.id } })"
+      >
+        <template #content>
+          <div class="flex flex-col md:flex-row md:items-center md:justify-between gap-2">
+            <div class="flex items-center gap-3">
+              <div>
+                <p class="font-semibold">{{ a.name || 'Ride' }}</p>
+                <p class="text-surface-500 text-sm">{{ formatDate(a.date) }}</p>
+              </div>
+              <Tag :value="a.activity_type" severity="info" class="text-xs" />
+            </div>
+            <div class="flex items-center gap-4 md:gap-6 text-sm flex-wrap">
+              <div class="text-center">
+                <p class="text-surface-500 text-xs">Duration</p>
+                <p class="font-semibold">{{ formatDuration(a.duration) }}</p>
+              </div>
+              <div class="text-center">
+                <p class="text-surface-500 text-xs">Distance</p>
+                <p class="font-semibold">{{ formatDistance(a.distance) }}</p>
+              </div>
+              <div v-if="a.metrics?.avg_power" class="text-center">
+                <p class="text-surface-500 text-xs">Power</p>
+                <p class="font-semibold">{{ a.metrics.avg_power }}W</p>
+              </div>
+              <div v-if="a.metrics?.tss" class="text-center">
+                <p class="text-surface-500 text-xs">TSS</p>
+                <p class="font-semibold">{{ a.metrics.tss }}</p>
+              </div>
+              <div v-if="a.metrics?.normalized_power" class="text-center hidden md:block">
+                <p class="text-surface-500 text-xs">NP</p>
+                <p class="font-semibold">{{ a.metrics.normalized_power }}W</p>
+              </div>
+            </div>
+          </div>
         </template>
       </Card>
     </div>
diff --git a/frontend/src/views/LoginView.vue b/frontend/src/views/LoginView.vue
index 75e7295..e4a4e97 100644
--- a/frontend/src/views/LoginView.vue
+++ b/frontend/src/views/LoginView.vue
@@ -61,17 +61,17 @@ onMounted(async () => {
       <template #title>
         <div class="text-center">
           <span class="text-primary text-3xl font-bold">VeloBrain</span>
-          <p class="text-surface-400 text-sm mt-2">AI-Powered Cycling Training Platform</p>
+          <p class="text-surface-500 text-sm mt-2">AI-Powered Cycling Training Platform</p>
         </div>
       </template>
       <template #content>
         <div class="flex flex-col items-center gap-4">
           <div v-if="loading" class="flex flex-col items-center gap-3">
             <ProgressSpinner style="width: 50px; height: 50px" />
-            <p class="text-surface-400 text-sm">Signing in via Telegram...</p>
+            <p class="text-surface-500 text-sm">Signing in via Telegram...</p>
           </div>
           <div v-else>
-            <p v-if="error" class="text-red-400 text-sm mb-4 text-center">{{ error }}</p>
+            <p v-if="error" class="text-red-500 text-sm mb-4 text-center">{{ error }}</p>
             <div id="telegram-login-container" class="flex justify-center"></div>
           </div>
         </div>
diff --git a/frontend/src/views/SettingsView.vue b/frontend/src/views/SettingsView.vue
index 73ad30f..d80d6ee 100644
--- a/frontend/src/views/SettingsView.vue
+++ b/frontend/src/views/SettingsView.vue
@@ -1,14 +1,139 @@
 <script setup lang="ts">
+import { ref, onMounted } from 'vue'
+import { useAuthStore } from '../stores/auth'
 import Card from 'primevue/card'
+import InputNumber from 'primevue/inputnumber'
+import InputText from 'primevue/inputtext'
+import Select from 'primevue/select'
+import Textarea from 'primevue/textarea'
+import Button from 'primevue/button'
+import Message from 'primevue/message'
+
+const auth = useAuthStore()
+
+const form = ref({
+  name: '',
+  ftp: null as number | null,
+  lthr: null as number | null,
+  weight: null as number | null,
+  goals: '',
+  experience_level: '',
+})
+
+const saving = ref(false)
+const success = ref(false)
+
+const experienceLevels = [
+  { label: 'Beginner', value: 'beginner' },
+  { label: 'Intermediate', value: 'intermediate' },
+  { label: 'Advanced', value: 'advanced' },
+  { label: 'Pro', value: 'pro' },
+]
+
+onMounted(() => {
+  if (auth.rider) {
+    form.value.name = auth.rider.name || ''
+    form.value.ftp = auth.rider.ftp
+    form.value.lthr = auth.rider.lthr
+    form.value.weight = auth.rider.weight
+    form.value.goals = auth.rider.goals || ''
+    form.value.experience_level = auth.rider.experience_level || ''
+  }
+})
+
+async function save() {
+  saving.value = true
+  success.value = false
+  try {
+    await auth.updateRider({
+      name: form.value.name || undefined,
+      ftp: form.value.ftp,
+      lthr: form.value.lthr,
+      weight: form.value.weight,
+      goals: form.value.goals || null,
+      experience_level: form.value.experience_level || null,
+    })
+    success.value = true
+    setTimeout(() => { success.value = false }, 3000)
+  } finally {
+    saving.value = false
+  }
+}
 </script>
 
 <template>
   <div>
     <h1 class="text-2xl font-semibold mb-6">Settings</h1>
-    <Card>
-      <template #content>
-        <p class="text-surface-400">FTP, weight, zones, goals — coming soon</p>
-      </template>
-    </Card>
+
+    <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
+      <!-- Profile -->
+      <Card>
+        <template #title>Profile</template>
+        <template #content>
+          <div class="flex flex-col gap-4">
+            <div>
+              <label class="text-surface-500 text-xs uppercase font-medium mb-1 block">Name</label>
+              <InputText v-model="form.name" class="w-full" />
+            </div>
+            <div>
+              <label class="text-surface-500 text-xs uppercase font-medium mb-1 block">Experience Level</label>
+              <Select
+                v-model="form.experience_level"
+                :options="experienceLevels"
+                option-label="label"
+                option-value="value"
+                placeholder="Select level"
+                class="w-full"
+              />
+            </div>
+            <div>
+              <label class="text-surface-500 text-xs uppercase font-medium mb-1 block">Goals</label>
+              <Textarea v-model="form.goals" rows="3" class="w-full" placeholder="e.g. Complete a century ride, improve FTP to 300W..." />
+            </div>
+          </div>
+        </template>
+      </Card>
+
+      <!-- Training Zones -->
+      <Card>
+        <template #title>Training Parameters</template>
+        <template #content>
+          <div class="flex flex-col gap-4">
+            <div>
+              <label class="text-surface-500 text-xs uppercase font-medium mb-1 block">FTP (Functional Threshold Power)</label>
+              <div class="flex items-center gap-2">
+                <InputNumber v-model="form.ftp" :min="50" :max="600" class="w-full" placeholder="e.g. 250" />
+                <span class="text-surface-500 text-sm font-medium">W</span>
+              </div>
+            </div>
+            <div>
+              <label class="text-surface-500 text-xs uppercase font-medium mb-1 block">LTHR (Lactate Threshold Heart Rate)</label>
+              <div class="flex items-center gap-2">
+                <InputNumber v-model="form.lthr" :min="100" :max="220" class="w-full" placeholder="e.g. 170" />
+                <span class="text-surface-500 text-sm font-medium">bpm</span>
+              </div>
+            </div>
+            <div>
+              <label class="text-surface-500 text-xs uppercase font-medium mb-1 block">Weight</label>
+              <div class="flex items-center gap-2">
+                <InputNumber v-model="form.weight" :min="30" :max="200" :max-fraction-digits="1" class="w-full" placeholder="e.g. 75" />
+                <span class="text-surface-500 text-sm font-medium">kg</span>
+              </div>
+            </div>
+            <div v-if="form.ftp && form.weight" class="bg-surface-50 rounded-lg p-3 border border-surface-200">
+              <p class="text-surface-500 text-xs uppercase mb-1">W/kg ratio</p>
+              <p class="text-xl font-bold text-primary">{{ (form.ftp / form.weight).toFixed(2) }} <span class="text-sm font-normal text-surface-500">W/kg</span></p>
+            </div>
+          </div>
+        </template>
+      </Card>
+    </div>
+
+    <div class="flex items-center gap-4 mt-6">
+      <Button label="Save Changes" icon="pi pi-check" :loading="saving" @click="save" />
+      <transition enter-active-class="transition-opacity" leave-active-class="transition-opacity" enter-from-class="opacity-0" leave-to-class="opacity-0">
+        <Message v-if="success" severity="success" :closable="false" class="m-0">Settings saved successfully</Message>
+      </transition>
+    </div>
   </div>
 </template>
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