Work out running power instantly with clear inputs, formula shown and shareable results.
Running power models the metabolic cost as a horizontal term of roughly 0.98 J per kilogram per metre plus a climbing term for vertical work. At 12 km/h a 70 kg runner produces about 229 W on the flat, rising with gradient. Power meters use this kind of model because it responds instantly to hills, unlike heart rate.
Horizontal power
P = 0.98 x mass x velocity
Climbing power
P = m g v x grade x efficiency term
This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.
No. Cycling power is measured mechanical output at the crank; running power is a model of metabolic cost, so the numbers are not interchangeable.
Because it stays consistent on hills and in wind, where pace misrepresents effort and heart rate lags behind.