Originally Posted by
OakLeaf
So then the cyclist decides to go running. But our running muscles just aren't in the same kind of shape as our cycling muscles, besides the fact that even slow running is pretty intense cardiovascularly (whereas on a bike, if you want you can just take the pace down and pretty much cruise forever, long after you feel like your muscles are done).
So we're reaching our running lactate threshold at a HR that doesn't even begin to challenge a cardiovascular system that's in pretty good shape from cycling.