What is (Pw:Hr), Aerobic Decoupling?
Aerobic Decoupling is a ratio between Normalized Power and Heart Rate between first and second part of your workout.
(NP1/HR1) – (NP2-HR2)/(NP1/HR1)
NP1 – Normalize Power from first half part of the workout
NP2 – Normalize Power from second half part of the workout
HR1 – Heart Rate from first half part of the workout
HR2 – Heart Rate from second half part of the workout
The goal is to be below 5%
How to Use it?
It can be used as a “rate of fatigue”. It could be used during long aerobic workouts, long climbs or time trials. Aerobic Decoupling reflects how heart rate is reacting to our input which is power.
For the best result in tracking Pw:HR it is good to check it during steady, below threshold workouts, going over your FTP is not the best reflection because reaction of power and heart rate is way different timewise.