Running power measures mechanical output in watts — largely independent of hills, wind, and terrain — giving more consistent intensity targets than pace alone and faster response than heart rate.
Power vs pace vs heart rate
Pace fails on hills and trails. Heart rate lags and drifts in heat. Power responds immediately to effort changes.
Critical power (CP) or threshold power anchors zones similarly to FTP in cycling.
Typical zone structure
- Easy: below 80% of threshold power
- Tempo: 80–90%
- Threshold: 90–100%
- VO2: above 100%
Using Vo2Max
Set your threshold pace in Vo2Max to get zone-calibrated runs regardless of whether you use power or GPS.
Related guides
Fundamentals
Running Training Zones (Pace & Heart Rate)
Running training zones based on lactate threshold heart rate (LTHR) and pace. Learn easy, tempo, threshold, and VO2 zones for structured running plans.Fundamentals
What Is LTHR (Lactate Threshold Heart Rate)?
LTHR is the heart rate at lactate threshold — the key anchor for running zones. Learn how to find LTHR and use it in structured training plans.Running
Marathon Training Plan Structure
How to structure a 16–20 week marathon training plan. Weekly mileage, long runs, tempo work, and taper guidance for first-time and experienced marathoners.Fundamentals
What Is Training Stress Score (TSS)?
Training Stress Score (TSS) quantifies workout load from duration and intensity. Learn how TSS works in cycling and running, and why coaches use weekly TSS targets.
Frequently asked questions
Is running power worth it?
Most useful on hilly courses, trails, and treadmill parity. Flat road runners often succeed with pace.
Does Vo2Max support running power?
Vo2Max calibrates running plans from threshold pace or heart rate; power integration depends on your device sync.