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First complete version of 400m Race Lab: a 3D 400 m race simulator for athletes and coaches.
Try it: https://thomasmavro.github.io/TrackLab/ · User guide · How accurate is it?
What's in it
- Race model: a force-velocity sprinter with anaerobic and aerobic energy, air drag, wind, air density, bends, lane geometry and a wet-track option, following a race plan of target splits.
- Real athletes: 222 Olympic and World Championship performances (finals and semi-finals, 2017–2025) from official splits, reaction times, lanes and conditions.
- Your own runs: typed splits, or GPX, TCX and FIT watch files, or CSV from timing gates, a laser or a radar.
- Ghost runner: race a past version of yourself in the same lane.
- Your report: where the race is won or lost every 10 m, levers ranked by time gained and following your priorities, and a goal search ("what would it take to run X?").
- History: sessions of saved runs, a side-by-side comparison of two runs, and export as an image or PDF.
- Built-in user guide, and men's and women's avatars.
Accuracy
- Fitted to their own races, all 222 performances are reproduced within 0.08 s at every published split.
- On unseen races (profile fitted to a semi-final, predicting the final): 0.29 s average error when the semi was a full effort, against 0.33 s for an "average fade" rule.