AI Run Analysis
Drop in a Garmin .fit file from a run and get a plain-language coach read of how it went — pacing, heart-rate drift, cadence and effort, with concrete advice.
Anonymous and one-shot: your file is analysed in the moment and never stored. Nothing is saved, nothing is used for training.
.fit only · up to 2 MB
Use your own API key (no limits)
Used once for this analysis and never stored — not even in your browser.
What the AI analyses
Your .fit file contains a full record of the run: per-second pace, heart rate, cadence, elevation and GPS coordinates. The tool reads the aggregated metrics — overall pace, how it varied through the run, heart-rate trend and cadence — and gives you a plain-language coaching read of how the run went.
The coach output covers your pacing pattern (even, negative or positive split and what it cost or saved you), heart-rate drift (whether your effort level held steady as the run progressed), cadence relative to efficient benchmarks, elevation impact, and concrete takeaways for your next session.
The tool works with Garmin .fit files from any activity recorded as a run. Files are processed in the moment and immediately discarded — we keep no history and nothing is used to train any model. Runners who upload frequently can use the bring-your-own API key option to bypass the daily free limit using their own Anthropic or OpenRouter account.