Found this interesting, good production value
For me, I have my own language: what I consider a “null” step whether running or speed hiking, is a step that produces no lactic acid and seems to consume no energy. Basically a free step. And at a certain pace, they all become free, which is what allows me to still hike on legs sore from previous day
But increase the pace, and to me the lactic acid is a “stack”, and there is an algorithm working in the muscle to dump off the bottom of the stack. So either the stack is being built too fast, or else the pace is to where the entire stack can be dumped, essentially resetting the legs to neutral
But on a fast 400m, neither of these can happen
https://m.youtube.com/watch?v=