The problem with such methods is that even youths in their prime can end up so sore that they give up on the program. Then again it is in the blush of youth that the need to rush things seems most urgent.

As you get older that sort of method doesn't really save you as much time as it might otherwise because it may take two, perhaps three days, for even nominal recovery. Injury and debilitating pain are also more common. As one weight trainer put it: The idea is to stimulate the muscle; not annihilate it.

IMHO the best method is a more moderated effort of strength training combined with stretching, low-impact endurance training, and regular days off where the only physical exercise is walking.