Is There a Difference Between Short Duracies and Longer Durations?

The importance of the posphol crreting system to those sprints is maybe less, yes? And probly teother one that's be protty tricky to study too. I'm thinking things like mountain biking,. when you suddenly get to a log you've got to get over, or a rock garden that's just yo sort of maximum effort for a few seconds just to clear that obstacle. i'd like to see studies trying to look ati in that kind of an exercise protocl or that kind of variation.