🏃 z2

A Python toolkit for analyzing and visualizing your Strava activities without paying for Strava Premium. Sync your activities, generate cool visualizations, and track your performance metrics over time. This repository is conceived as a starting point for building more advanced Strava data analysis tools. I will keep adding features and visualizations over time.

⚠️Disclaimer: This project stores Strava data locally on your machine. It is the responsibility of each user to comply with Strava's API Agreement and their terms regarding data storage and usage. Please review Strava's policies before using this tool.

Powered by Strava. z2 is an independent project and is not affiliated with, endorsed by, or sponsored by Strava, Inc.

✨ Current features

• Web Dashboard: Full-featured React frontend with FastAPI backend:
  • 📅 Calendar: Monthly calendar with activity overlay, training session planning, weekly report, goal progress, streaks, and race countdowns
  • 🏃 Activities: Browsable activity list with detail views, stream charts, splits, segments, and map visualization
  • 🌍 Aggregations: Interactive Leaflet map with all your routes, filterable by sport and year, plus heatmap export
  • ⚡ Dashboard: Yearly stats with goal ring, monthly charts, records, and sport breakdowns
  • 🏆 Personal Records: Best efforts at standard distances with sport-category totals
  • 📊 Analytics: Race-time predictor with per-distance cards (central estimate + IQR band) using a weighted blend of VDOT (target-specific) and the Riegel family (fixed 1.06 + personalized fit), plus an evolution chart of predicted times across 12/16/24/52-week windows
  • 🏋️ Workouts: Structured workout templates with segments (warmup / work / recovery / cooldown)
  • ⚑ Races: Race calendar with day-countdowns, past-race activity linking, and notes
  • ⌚ Garmin(optional): Watch-level wellness data Strava doesn't expose — sleep score & stages, HRV status, training readiness, body battery, stress, VO2max, resting HR, steps, SpO2, respiration. Configured separately via GARMIN_EMAIL / GARMIN_PASSWORD.
  • 👤 Profile: Athlete profile, HR zones, goals management, cache completeness, and API rate limits
  • 📸 PNG Exports: Preview-first export dialog for every visualization (quality, color, filename)
  • 🌗 Dark/Light Mode: Full theme toggle with persistent preference
• Activity Sync: Automatically sync and cache your Strava activities locally using Parquet files
• Cool Visualizations: Generate visualizations including:
  • ⚡ Thunderstorm Heatmap: Neon-style activity route visualization on dark backgrounds
  • 🕐 Activity Clock: Polar scatter plot showing when you train (time vs distance)
  • 🎛️ HUD Dashboard: Cyberpunk-style histograms for distance, heart rate, and pace
  • 📈 Efficiency Factor: Track your aerobic efficiency (speed/HR) over time
  • 🚀 Performance Frontier: Pareto frontier with Riegel's fatigue model fitting
  • 📅 Weekly Report: Instagram Story-sized weekly training summary with HR zones, sports breakdown, and accumulated training time
  • 🎯 Year in Sport: Instagram Story-sized summaries of your yearly training (main sport & totals)
  • 🏆 Activity Plots: Neon-style individual activity visualization with elevation profile
• Map Matching: Match GPS tracks to OpenStreetMap road networks using HMM-based matching:
  • 🗺️ Street Coverage Map: Neon-glow visualization of all streets you've traversed in a city
  • 📍 Activity Match Plot: Per-activity visualization showing GPS track, matched OSM edges, and snap points
  • 📊 Coverage Stats: Track how many km of a city's street network you've covered
• Analytics: Race-time predictions using a top-K (fastest efforts per standard distance) model with recency decay and per-target VDOT. Exposed at /analytics in the web app with an evolution chart so you can track how each predicted race time has moved across the year.
• GeoJSON Export: Export your activities as GeoJSON for use in mapping applications such as QGIS
• Telegram Bot: Automated scheduled delivery of weekly and monthly reports to your Telegram chat
• Smart Caching: Efficient local caching with incremental sync support to avoid redundant API calls

📋 Prerequisites

• Python 3.12+
• A Strava FREE account with API access
• Strava API credentials (Client ID and Client Secret)

🔧 Installation

Using Poetry (Recommended)

# Clone the repository
git clone https://github.com/rsanchezmo/zone2.git
cd zone2
# Install dependencies with Poetry
poetry install
# Activate the virtual environment
poetry env activate

Using pip

# Clone the repository
git clone https://github.com/rsanchezmo/zone2.git
cd zone2
# Create a virtual environment
python -m venv .venv
source .venv/bin/activate # On Windows: .venv\Scripts\activate# Install the package
pip install -e .

🔑 Strava API Setup

1. Go to Strava API Settings
2. Create a new application to get your Client ID and Client Secret
3. Create a .env file in the project root:

STRAVA_CLIENT_ID=your_client_idSTRAVA_CLIENT_SECRET=your_client_secret

4. On first run, the app will open a browser for OAuth authorization. Follow the prompts to grant access.

🤖 Telegram Bot Setup (Optional)

You can optionally set up a Telegram bot to receive automated weekly reports (Sundays at 21:00) and monthly Year in Sport summaries (last day of month at 21:00).

1. Create a Telegram bot via @BotFather and get your bot token
2. Get your Telegram chat ID (send a message to your bot, then visit https://api.telegram.org/bot<YourBOTToken>/getUpdates)
3. Add these to your .env file:

TELEGRAM_BOT_TOKEN=your_bot_tokenTELEGRAM_CHAT_ID=your_chat_id

4. Run the bot:

python telegram_bot.py

The bot supports manual commands:

• /weekly - Generate and send current week's report
• /monthly - Generate and send current year's report

⌚ Garmin Connect Setup (Optional)

Surfaces watch-level wellness data Strava doesn't carry: sleep score & stages, HRV status, training readiness, body battery, stress, VO2max, resting HR, steps, SpO2 and respiration. Lives under a separate Garmin tab in the web dashboard — Strava remains the source of truth for activities.

1. Add your Garmin Connect credentials to .env:

GARMIN_EMAIL=your.email@example.comGARMIN_PASSWORD=your_password

2. Start the backend (python run_dev.py). The first login may need an MFA code — Garmin caches the OAuth token afterwards at .strava/garmin/, so restarts won't re-prompt.

3. Open the Garmin tab and click Sync recent (refreshes the last 14 days) or Backfill all (walks history backwards until the watch's earliest recorded day — can take 20–60 minutes in the background).

The integration is fully optional: with no credentials, the tab shows a configuration hint and the rest of the app is unaffected. If Garmin asks for MFA again later (rare — only on token expiry or new device), run the provisioning helper from a terminal:

poetry run python scripts/garmin_poc.py

🌐 Web Dashboard

Run the full web app (FastAPI backend + React frontend):

# Install dependencies
poetry install
cd frontend && npm install &&cd ..
# Run both backend and frontend in development mode
python run_dev.py

The app will be available at http://localhost:5173. The backend API runs on http://localhost:8000.

Screenshots

Calendar	Year	Analytics
Monthly planning with activity overlay, weekly reports, goal progress, streaks, and race countdowns	Yearly stats with goal ring, monthly charts, records, and sport breakdowns	Race-time predictor with uncertainty bands + evolution chart across 12 / 16 / 24 / 52-week windows

Production deployment

To run the web app on a home server (Raspberry Pi, small VPS, etc.) behind a Cloudflare Tunnel with Cloudflare Access authentication, see DEPLOY.md. It covers:

• Cloudflare Tunnel + Access setup
• Docker Compose on ARM64
• Seeding the activity cache to skip the interactive OAuth on a headless box
• SSH over the same tunnel
• Automated redeploys on push via a systemd timer (see deploy/README.md)

🚀 Quick Start (Python API)

fromzone2.coreimportZone2frompathlibimportPath# Initialize (auto-syncs activities if cache is older than 12 hours)z2=Zone2(workdir=Path("./zone2_workdir"))
# Generate a thunderstorm heatmap for your runs in Amsterdamz2.strava_visualizer.thunderstorm_heatmap(
sport_types=['Run'],
location="amsterdam",
radius_km=20.0,
add_basemap=False
)
# Create an activity clock visualizationz2.strava_visualizer.activity_clock(sport_types=['Run'])
# Generate a HUD-style dashboardz2.strava_visualizer.hud_dashboard(sport_types=['Run'])
# Plot efficiency factor trendz2.strava_visualizer.plot_efficiency_factor(sport_types=['Run'])
# Plot performance frontier with fatigue modelz2.strava_visualizer.plot_performance_frontier(sport_types=['Run'])
# Generate Year in Sport summary (Instagram Story format)z2.get_year_in_sport(year=2025, main_sport="Run", neon_color="#fc0101")
# Generate Year in Sport with comparison to previous yearz2.get_year_in_sport(
year=2025, main_sport="Run", neon_color="#fc0101",
comparison_year=2024,
comparison_neon_color="#00aaff"
)
# Generate Weekly Report (Instagram Story format)z2.get_weekly_report(week_start_date="2026-01-12", neon_color="#fc0101")
# Export activities as GeoJSONz2.save_geojson_activities()
# --- Map Matching & Street Coverage ---fromzone2.map_matchingimportStravaMapMatcherfromzone2.utilsimportget_activities_as_gdf_from_streams# Initialize the map matcher for a citymap_matcher=StravaMapMatcher(
city_name="Amsterdam, Netherlands",
workdir=Path("./zone2_workdir"),
force_reload=False,
)
# Build a GeoDataFrame from high-res GPS streamsactivities_gdf=get_activities_as_gdf_from_streams(
z2.strava_activities_cache.activities
)
# Match all activities to the OSM road networkmatched_gdf, match_details=map_matcher.match(activities_gdf)
# Plot individual activity match resultsforactivity_id, resultinmatch_details.items():
result.plot(save_path=f"map_match_{activity_id}.png")
# Generate a city-wide street coverage mapmap_matcher.plot_coverage(match_details, save_path="amsterdam_coverage.png")

📊 Visualizations

Thunderstorm Heatmap

A stunning neon visualization of your activity routes on a dark canvas. Perfect for showcasing your training coverage in a specific area.

Thunderstorm Heatmap	Activity Clock
Neon-style route visualization on dark backgrounds	Polar plot showing training patterns by time of day

HUD Dashboard & Analytics

HUD Dashboard	Efficiency Factor	Performance Frontier
Distance, HR & Pace distributions	Aerobic efficiency over time	Best performances with Riegel's model

Weekly Report & Bubble Map

Weekly Report	Bubble Map
Instagram Story-sized weekly summary with HR zones, sport breakdowns, and training progression	Geographic bubble visualization of activity locations

Year in Sport

Generate Instagram Story-sized (9:16) summaries of your yearly training with optional year comparison.

Main Sport	All Sports	Activity Plot
Stats, monthly chart & personal bests	Aggregated stats across all sports	Route map with elevation profile

Year Comparison — Run	Year Comparison — Totals
Side-by-side stats with grouped bar charts	Cross-sport comparison with highlighted differences

Map Matching & Street Coverage

Match your Strava activities to the OpenStreetMap road network using HMM-based map matching.

Street Coverage Map	Activity Match Plot
Traversed streets glow in neon against the dim untraversed network	GPS track (red), matched OSM edges (blue), snap connections (white)

QGIS GeoJSON Export

Export your activities as GeoJSON for advanced spatial analysis in QGIS.

All Activities	Activity Info

🏗️ Project Structure

zone2/
├── main.py # Example usage (Python API)
├── telegram_bot.py # Scheduled Telegram reports
├── run_dev.py # Dev launcher (backend + frontend)
├── pyproject.toml # Poetry configuration
├── Dockerfile # Multi-stage build (Node → Python)
├── docker-compose.yml # App + Cloudflare Tunnel
├── README.md
├── DEPLOY.md # Raspberry Pi / production guide
├── backend/ # FastAPI backend
│ ├── app.py # FastAPI application + lifespan
│ ├── config.py # Pydantic settings
│ ├── db.py # SQLite (calendar / goals / workouts)
│ ├── dependencies.py # DI for the Zone2 singleton
│ ├── export_cache.py # In-memory TTL cache for PNG exports
│ ├── scoring.py # Session execution scoring
│ ├── _serialize.py # numpy/pandas → JSON sanitizer
│ ├── _ttl_cache.py # Thread-safe TTL cache primitive
│ └── routers/ # API route handlers
│ ├── activities.py
│ ├── athlete.py
│ ├── calendar.py
│ ├── exports.py
│ ├── goals.py
│ ├── health.py
│ ├── races.py
│ ├── stats.py
│ ├── sync.py
│ └── workouts.py
├── frontend/ # React + Vite (TypeScript) SPA
│ ├── src/
│ │ ├── App.tsx # Routes + lazy pages + ErrorBoundary
│ │ ├── main.tsx # Entry point + QueryClient defaults
│ │ ├── index.css # Tailwind v4 tokens + primitives
│ │ ├── api/ # Axios client + React Query hooks
│ │ ├── components/
│ │ │ ├── icons.tsx # Inline SVG icon set
│ │ │ ├── layout/ # AppShell, RootErrorBoundary
│ │ │ └── shared/ # ChartPanel, GoalRing, StatCard, …
│ │ ├── hooks/ # Theme + toast
│ │ └── pages/ # Dashboard, Calendar, Activities, …
│ └── vite.config.ts
├── deploy/ # systemd units for auto-deploy
│ ├── z2-deploy.service
│ ├── z2-deploy.timer
│ └── README.md
├── scripts/ # Deploy + dev scripts
│ ├── auto-deploy.sh # prod-branch poller (run by systemd)
│ ├── install-hooks.sh # one-shot git hooks installer
│ └── hooks/pre-commit # secret-scanning pre-commit hook
└── zone2/ # Core Python library
├── activities_cache.py # Parquet-backed cache w/ cache_version
├── analytics.py # Year-in-sport, weekly report, PRs, PMC
├── constants.py # CRS constants
├── core.py # Main orchestrator class (Zone2)
├── endpoint.py # Strava API client w/ rate-limit pre-check
├── garmin_cache.py # Parquet-backed Garmin daily-stats cache
├── garmin_client.py # Garmin Connect client
├── garmin_extractors.py # Per-metric payload → summary extractors
├── map_matching.py # OSM map matching & coverage
├── mcp.py # MCP server (placeholder)
├── streams_store.py # Columnar GPS/HR stream storage
├── user_cache.py # User data caching
├── utils.py # Utility functions
└── visualizer.py # Visualization generators

📝 API Reference

The library is organized around one orchestrator (Zone2) that wires together four focused components. All Python methods listed below are the public surface; the web API exposes the same functionality via /api/* routes (see backend/routers/).

Zone2

The main class that orchestrates all functionality.

Zone2(
workdir: Path, # Working directory for generated outputsauto_sync: bool=True, # Auto-sync on initializationsync_max_age_hours: int=12, # Cache age threshold for auto-sync
)

Methods:

• sync_activities(full_sync=False, include_streams=False) — pull new activities from Strava
• ensure_activities_with_streams() — backfill streams / photos / detail for cached activities
• save_geojson_activities() / save_gpkg_activities() — export the full cache to GeoJSON or GeoPackage
• plot_last_activity(sport_type) — render the most recent activity of the given sport
• get_year_in_sport(year, main_sport, neon_color, comparison_year=None, comparison_neon_color="#00aaff") — Year-in-Sport visualizations with optional year comparison
• get_weekly_report(week_start_date=None, neon_color="#fc0101") — weekly training summary (current week by default)

StravaVisualizer

Generates all matplotlib visualizations. Every rendering method supports return_buffer=True (returns a PNG BytesIO — used by the web /api/exports endpoints) and dpi=<int> (override quality).

Methods:

• thunderstorm_heatmap(location, sport_types, radius_km, neon_color, show_title, year, return_buffer, dpi) — neon route overlay
• activity_bubble_map(region, sport_types, min_radius_scale, grid_density, neon_color, show_title, return_buffer, dpi) — bubble aggregation per grid cell
• activity_clock(sport_types, neon_color, return_buffer, dpi) — polar plot (time-of-day × distance)
• plot_activity(activity_id, strava_endpoint, folder, title, neon_color, return_buffer, dpi) — single-activity neon plot
• plot_year_in_sport_main(year, year_in_sport, main_sport, folder, neon_color, comparison_year, comparison_data, comparison_neon_color, return_buffer, dpi)
• plot_year_in_sport_totals(year, year_in_sport, folder, neon_color, comparison_year, comparison_data, comparison_neon_color, return_buffer, dpi)
• hud_dashboard(sport_type, neon_color, return_buffer, dpi) — cyberpunk histograms
• plot_efficiency_factor(sport_type, window=14, return_buffer, dpi) — aerobic efficiency over time
• plot_performance_frontier(sport_types, return_buffer, dpi) — Pareto frontier + Riegel fit
• plot_weekly_report(weekly_report, folder, neon_color, last_week_report, return_buffer, dpi) — Instagram-Story sized weekly summary

StravaAnalytics

Pure-Python analytics over the activity cache. All methods are memoized and invalidate on sync via a cache_version token.

Methods:

• get_weekly_report(week_start_date=None, cutoff_date=None) — weekly totals, HR zones, sport breakdown
• get_year_in_sport(year, main_sport, cutoff_month_day=None) — yearly aggregates for one sport
• get_all_year_in_sport(year, cutoff_month_day=None) — cross-sport yearly aggregates
• get_personal_records() — best efforts at standard distances per sport category
• get_race_predictions(sport_category="running") — VDOT/Riegel-based predicted race times
• get_daily_training_load() — per-day TRIMP (zone-weighted when streams available, Banister fallback)
• get_pmc_chart(start_date=None, end_date=None) — Performance Management Chart (CTL / ATL / TSB)
• get_fitness_trend(sport_type="Run", start_date=None, end_date=None) — VDOT trend with rolling average
• get_hr_zones() / get_max_heart_rate() / get_rest_heart_rate() — HR zone configuration
• get_current_vo2_max() — VO₂max estimate from recent efforts
• invalidate_caches() — clear all memoized analytics (called on sync)

StravaMapMatcher

HMM-based map matching of GPS tracks to OSM road networks.

StravaMapMatcher(
city_name: str, # City name for OSM network downloadworkdir: Path, # Working directory for cached mapsforce_reload: bool=False, # Force re-download of OSM data
)

Methods:

• match(activities) — map-match a GeoDataFrame of activities; returns matched GeoDataFrame + per-activity MatchResult dict
• coverage_stats(match_results) — city-wide coverage (km traversed, % covered, unique roads)
• plot_coverage(match_results, save_path, neon_color, figsize) — neon-glow coverage map

🗺️ Roadmap

• Telegram bot for automated weekly and monthly reports
• Web dashboard with React frontend and FastAPI backend
• Dark/light mode support
• Athlete profile page with HR zones
• Extend the analytics, use ML models to provide deeper insights, such as training load, fatigue estimation, and performance prediction
• Add more visualizations
• Create an mcp server to expose Strava data so you can access it from your LLM based agents

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

After cloning, install the local git hooks once so the pre-commit check can catch accidentally-staged secrets (.env, tokens, etc.) before they reach GitHub:

./scripts/install-hooks.sh

Hooks live in scripts/hooks/ (version-controlled) and are symlinked into your local .git/hooks/ — edit once, they update everywhere.

📄 License

MIT — free to use, modify, and distribute. If you build something neat on top of this, I'd love to hear about it.