I would be interested in this as well. But my interest is more in the sense of if I push the HR into Z3 and use the anaerobic process, how long do I have to be back in Z2 before anaerobic shuts down and returns to aerobic. I know it’s not a binary on/off for both systems, but have wondered how long it takes to return to aerobic function after exceeding the limit on a short stretch of trail.
Put another way, how long does it take to have the anaerobic system kick in. Do short pickups start to transition into an anaerobic state, or are they short enough that you remain aerobic?
I’m guessing this is covered in one of the books, but I don’t remember off hand.
