Updated 2026-06-16
Running power attempts to estimate effort in watts. It can be useful on hills and windy days, but it is not interchangeable across every device or athlete.
Why runners use power
Pace changes with terrain, and heart rate lags behind effort. Power can respond faster than heart rate and can help runners control effort on climbs, rolling courses, and interval sessions.
The limitation
Running power is estimated, not measured the same way cycling power is measured at a crank, pedal, or hub. Different devices can report different wattage for the same effort. That means your own historical trend matters more than comparing your number to another runner’s number.
Best uses
- Controlling hill repeats without chasing flat-road pace.
- Keeping marathon effort steady on rolling courses.
- Comparing similar workouts over time.
- Adding context alongside pace and heart rate.
Bottom line
Running power is useful when it helps you pace effort. It is a distraction when it becomes one more metric without a training decision attached.