The Predictive Runner

Workout Viewer

Load a .fit file from your watch or pod and see its metrics traced over time — power, heart rate, cadence, pace, and elevation stacked on a shared clock, with a linked crosshair to read them all at any moment. The file is parsed locally and never leaves your device.

Load a .fit file

Runs in your browser

Drop a Garmin/Stryd .fit file to chart its metrics over time. Nothing is uploaded — parsing happens on your device.

References

  1. All About the Mean Max Power Curve — Cody Stephenson, TrainingPeaks, which defines the mean maximal power curve and how to read its shape.