Running Load Simulator
Get a taste of our running load simulator! Compare your cumulative load from your run today to the run you plan to do tomorrow. Enter your metrics below, and see your cumulative load change.
We've pre-filled today as an example. No data yet? Just adjust tomorrow's run. Have your own? Tweak both and make it personal.
Today's run
Peak vGRF
2.49 BW
Total steps
4,590
Force (N)
1,706
Load / mi
3,809
11,427
cumulative load (BW · steps)
Tomorrow's intended run
🔒 Body mass locked from today — 154 lbs
Peak vGRF
2.49 BW
Total steps
4,590
Force (N)
1,706
Load / mi
3,809
11,427
cumulative load (BW · steps)
Tomorrow vs. today
0.0%
Heads up! Your personal peak ground reaction force is not measured here — it's estimated from a population-average regression model anchored at 2.5× bodyweight, adjusted for your pace, cadence, and mass. Actual peak force varies with foot strike pattern, footwear, running surface, and individual biomechanics.