How many push ups can you do? 20 or 30? 50? More? Maybe you’re one of the unlucky souls who can only manage five reps with questionable form. Say the word “exercise,” and the push up inevitably will be thought of as the movement of choice. For decades and possibly centuries, men have pointed to the push up as a true test of strength, not to mention machismo. How much simpler can it get than to just drop to the ground and start pumping away?