its morely rest tiem between sets detemrien CNS recouperation, hence wy powerlifters rest so long between sets
e.g for bodybuilding, 2-3 minutes has been shown to be long enough to allow full ATP restoration
while its been shown it takes between 3-5minutes for considerable CNS recovery
and over 5-10 minutes for complete CNS recovery (depending on the weight used, and exercise performed)
basiacly the longer the rest period, the better CNS recovery, and therefore the more strength u can generate into each set (great for powerlifting)