GARmin CONNECT DATA
Extracting training load, VO2 Max estimates, and acute activity telemetry from the Garmin ecosystem.
Garmin devices excel at high-frequency data collection during active periods (e.g., GPS tracking, cadence, heart rate under load). Unlike Oura or Apple, Garmin does not offer a straightforward public API for individual users outside of their Enterprise partner program.
Extraction Strategy: The GDPR Export
The most reliable method to access historical Garmin data in bulk is via the Data Privacy export tool. This yields a comprehensive ZIP file containing JSON representations of every activity, daily summary, and health metric.
For automated, ongoing extraction, open-source libraries that emulate the web client (e.g., Python's `garminconnect` package) are required, though these are subject to breakage when Garmin updates their auth flow.