hevy2garmin 0.1.1

Sync Hevy gym workouts to Garmin Connect — exercise mapping, FIT file generation, and automatic upload

hevy2garmin

Sync your Hevy gym workouts to Garmin Connect with correct exercise names, sets, reps, weights, calorie estimation, and optional heart rate overlay from your Garmin watch.

Hevy Pro required. The Hevy API is only available with a Hevy Pro subscription. Without it, hevy2garmin cannot access your workouts.

Why?

Hevy is great for tracking gym workouts but doesn't sync to Garmin. This tool bridges the gap:

• Maps 433+ Hevy exercises to Garmin FIT SDK categories so bench press shows as bench press, not "Other"
• Generates proper FIT files with exercise structure, sets, reps, weights, and timing
• Uploads to Garmin Connect with the correct activity name and a detailed description
• Estimates calories using the Keytel formula (weight, age, VO2max, heart rate)
• Overlays heart rate data from your Garmin watch onto workout charts with per-exercise segments
• Tracks synced workouts so nothing gets duplicated

Screenshots

Workouts	Mappings
HR Timeline	Calorie Breakdown

Requirements

• Hevy Pro subscription (required for API access)
• A Garmin Connect account
• Python 3.10+ (for local install only, not needed for one-click deploy)

Quick Start

Pick the option that fits you best:

One-Click Deploy (no coding required)

Deploy from your phone or computer in about 5 minutes. No terminal or coding needed.

You need Hevy Pro for API access. Free Hevy accounts cannot use hevy2garmin.

Step 1: Get your Hevy API key

Open hevy.com/settings, scroll to Integrations & API, click Generate API Key, and copy it. If you don't see this section, you need to upgrade to Hevy Pro.

Step 2: Create a free GitHub account (skip if you already have one)

Sign up at github.com. You'll use this to sign into Vercel too.

Step 3: Create a GitHub access token

This token lets hevy2garmin set up automatic syncing on your behalf. Open this link (sign in if prompted):

1. Set Expiration to No expiration (otherwise auto-sync stops when it expires)
2. Scroll to the bottom, click Generate token
3. Copy the token immediately (starts with ghp_). GitHub only shows it once.

Step 4: Deploy to Vercel

Click the button above. Sign in with GitHub if prompted. Vercel will ask for 4 values:

Field	What to paste
HEVY_API_KEY	The API key from step 1
GARMIN_EMAIL	Your Garmin Connect email
GARMIN_PASSWORD	Your Garmin Connect password
GITHUB_PAT	The token from step 3

Vercel will also create a free Postgres database automatically. Leave the default settings and click Deploy. Wait about a minute for it to build.

Step 5: Connect Garmin

Open your new app (Vercel gives you a URL like hevy2garmin-yourname.vercel.app). Click Save & Continue on the setup page.

The app will ask you to sign into Garmin through your browser:

1. Tap Sign into Garmin (opens Garmin's login page in a new tab)
2. Log in with your Garmin email and password
3. After login, copy the URL from your browser's address bar
4. Go back to the setup tab and paste it in the box
5. Click Connect

This is needed because Garmin blocks automated logins from cloud servers. Your browser does the login from your own internet connection, then the app stores the tokens securely.

Step 6: Sync your workouts

You're on the dashboard. Click Sync All Workouts to backfill your history. The app syncs one workout at a time (you can close the page and come back, it picks up where it left off).

To keep future workouts syncing automatically, toggle Auto-sync on the dashboard. This creates a background job that syncs new workouts every 2 hours.

That's it. Check Garmin Connect to see your workouts with proper exercise names, sets, reps, and weights.

Web Dashboard (local install)

pip install hevy2garmin
hevy2garmin serve

Not on PyPI yet? Install from source: git clone https://github.com/drkostas/hevy2garmin.git && cd hevy2garmin && pip install .

Open localhost:8123. The setup wizard walks you through connecting Hevy and Garmin.

Once you click Sync Now, your workouts appear in Garmin Connect within a few seconds. Enable auto-sync on the dashboard to keep things synced on a schedule (30 min to 24 hours).

To keep the server running in the background:

nohup hevy2garmin serve > /dev/null 2>&1 &

systemd service file (Linux)

Save as /etc/systemd/system/hevy2garmin.service:

[Unit]
Description=hevy2garmin dashboard
After=network.target

[Service]
ExecStart=hevy2garmin serve
Restart=always
User=your-username
Environment=HEVY_API_KEY=your-key
Environment=GARMIN_EMAIL=your-email

[Install]
WantedBy=multi-user.target

Then sudo systemctl enable --now hevy2garmin.

CLI

pip install hevy2garmin

# Interactive setup (Hevy API key + Garmin credentials)
hevy2garmin init

# Sync your 10 most recent workouts
hevy2garmin sync

# List recent workouts (checkmark = already synced)
hevy2garmin list

# Check sync status
hevy2garmin status

# Dry run (generate FIT files without uploading)
hevy2garmin sync --dry-run

# Sync last 5 workouts only
hevy2garmin sync -n 5

After syncing, check Garmin Connect to see your workouts.

Recurring sync without the dashboard: set up a crontab after running hevy2garmin init:

# Sync every 2 hours (uses credentials saved by hevy2garmin init)
0 */2 * * * hevy2garmin sync

Docker

git clone https://github.com/drkostas/hevy2garmin.git
cd hevy2garmin
docker build -t hevy2garmin .

Before running in Docker, you need Garmin auth tokens. Either:

• Run pip install hevy2garmin && hevy2garmin init locally (if you have Python), or
• Run docker run -it -v ~/.garminconnect:/root/.garminconnect hevy2garmin init to set up inside Docker interactively

Web dashboard with auto-sync:

docker run -d -p 8123:8123 --restart unless-stopped \
  -v ~/.hevy2garmin:/root/.hevy2garmin \
  -v ~/.garminconnect:/root/.garminconnect \
  -e HEVY_API_KEY=... \
  -e GARMIN_EMAIL=... \
  hevy2garmin serve

Open localhost:8123 and enable auto-sync on the dashboard.

One-off sync:

docker run --rm \
  -v ~/.hevy2garmin:/root/.hevy2garmin \
  -v ~/.garminconnect:/root/.garminconnect \
  -e HEVY_API_KEY=... \
  -e GARMIN_EMAIL=... \
  hevy2garmin sync

Python API

pip install hevy2garmin

Before using the API, make sure credentials are available via ~/.hevy2garmin/config.json (run hevy2garmin init), environment variables, or pass them directly.

from hevy2garmin.sync import sync

# Uses config from ~/.hevy2garmin/config.json (or env vars)
result = sync()
print(f"Synced: {result['synced']}, Skipped: {result['skipped']}")

# Or pass credentials directly (no config file needed)
result = sync(hevy_api_key="...", garmin_email="...", garmin_password="...")

# Just the exercise mapper
from hevy2garmin.mapper import lookup_exercise

cat, subcat, name = lookup_exercise("Bench Press (Barbell)")
# (0, 1, "Bench Press (Barbell)")

# Just FIT generation (see Hevy API docs for workout dict format:
# https://docs.hevy.com/#tag/workout/operation/workout)
from hevy2garmin.fit import generate_fit

result = generate_fit(hevy_workout_dict, hr_samples=None, output_path="workout.fit")

For cloud deployments (Vercel, CI/CD), install with Postgres support:

pip install hevy2garmin[cloud]

This adds psycopg2-binary and enables automatic Postgres backend detection via DATABASE_URL.

Getting Your Hevy API Key

Hevy Pro is required. API access is not available on the free plan.

1. Go to Hevy Settings > Integrations & API
2. Click Generate API Key and copy it
3. Paste it into hevy2garmin init, the web dashboard setup, or set as HEVY_API_KEY env var

If you don't see the Integrations & API section, you need to upgrade to Hevy Pro.

Credentials

Three ways to provide credentials (in order of precedence):

1. CLI flags: --hevy-api-key, --garmin-email, --garmin-password
2. Environment variables: HEVY_API_KEY, GARMIN_EMAIL, GARMIN_PASSWORD
3. Config file: ~/.hevy2garmin/config.json (created by hevy2garmin init or the web dashboard)

See .env.example for all available env vars.

Garmin authentication: Only needs the password for initial login. After that, tokens are cached (in ~/.garminconnect locally or in Postgres for cloud deploys) and refresh automatically.

Cloud deploys (Vercel): Garmin blocks automated logins from cloud servers. The setup wizard handles this by having you sign into Garmin through your browser, then securely storing the tokens. This only needs to be done once.

How It Works

1. Pulls workouts from the Hevy API
2. Maps each exercise to a Garmin FIT SDK category and subcategory (433+ built-in mappings, plus any custom ones you add)
3. Generates a structured FIT file with timing, sets, reps, weights, and calories
4. Optionally fetches HR data from Garmin daily monitoring and overlays it on the workout
5. Authenticates with Garmin via garmin-auth (self-healing OAuth)
6. Uploads the FIT file, renames the activity, and sets the description
7. Tracks synced workouts in SQLite (local) or Postgres (cloud) to avoid duplicates

Exercise Mapping

433+ Hevy exercises are mapped to Garmin FIT SDK categories. If an exercise isn't mapped it falls back to "Unknown" (category 65534). The web dashboard shows unmapped exercises and lets you add custom mappings with a few clicks. You can also add them via CLI:

hevy2garmin map "My Custom Exercise" --category 28 --subcategory 0

Development

git clone https://github.com/drkostas/hevy2garmin.git
cd hevy2garmin
python -m venv .venv && source .venv/bin/activate
pip install -e ".[dev]"
pytest tests/ -v

To test the Postgres backend locally:

pip install -e ".[dev,cloud]"
DATABASE_URL=postgresql://user:pass@localhost:5432/hevy2garmin pytest tests/ -v

License

MIT