Professional bodybuilding, let's not talk about this. The reason for the lack of fitness time on the roof is the rapid consumption of blood testosterone. From a biological point of view, shrinkage in fitness can better protect scrotum and penis from external damage. And strength training, especially leg training, will increase your own testosterone secretion. When you exercise, your own testosterone has been consumed. Of course you feel "no". Once you stop training, your own testosterone has not been consumed, and endogenous secretion has been strengthened through exercise. Two plus two will naturally make you feel "big and upright, stronger". This is all due to fitness. Do you understand, brother?