Fitness Simulator
Simulate your fitness build over weeks — plan your season with real numbers.
Configure Simulation
Weekly Load
Fitness Curve over Simulation Period
Weekly Breakdown
| Week | Load | Fitness (end) | Change | Load Zone |
|---|
Track Real Fitness from Strava
WattRun calculates your fitness automatically from your activities — updated daily with fatigue and form.
Start for free →Free · No subscription