Originally Posted by
Seattle Forrest
Of course they're related. If power is greater than zero, heart rate must be greater than zero as well.
I accept this.
I don't see how Powercal can be much better than the Strava Guesstimator, as for instance, 130bpm up a hill and 130bpm down a hill will have drastically different power numbers. Say I were to coast (not pedaling) down a hill for 10 miles with a HR sitting around 110bpm, how would Powercal differentiate that from riding with my wife, where I will average 100-110bpm and still do 25-30kJ per mile worth of work?