Originally Posted by
Hermes
. Plus max heart rate is different depending on the sport. I think running produces a higher HR than cycling due to using more muscles.
I've heard that said, too, often: but I don't think I believe it. Physiologically, I'd have thought that the max HR is determined by the extent to which the heart muscle can fulfil the demands placed upon it and still stay in rhythm. So that should be a single figure, the max is the max. It may be that some activities are more likely than others to generate demands that exceed that ability, but that seems to me to be a different thing.
Any cardiologists in the house?