re: Why is my HR so high on easy runs?

Interesting. So there’d have to be a threshold where the shorter stride length would produce diminishing returns, right? I’m also curious what 2 different stride lengths at the same pace and distance equates to for energy consumption. If energy expended is a direct result of stride versus pace and distance ran I’d like to see that study. Work is force times distance, right? If this is true, then energy covered over the same distance regardless of stride must be the same shouldn’t it?

This isn’t some gotcha that I’m trying to do here, I’m just trying to suss out how all other things being constant stride saves HR. I concede that a shorter stride may help with impact depending on the length and geometry of the runner, but the heart rate thing is really getting me here.