Please do not forget that not all exercise is created equal. Those meatheads who have arms as big as your torso may be doing horrible things inside their brains.
Recent studies have documented cases of brain stem injury and subarachnoid hemorrhage with maximal resistive exercise. http://www.thefreelibrary.com/Effect+of+breathing+ instruction+on+blood+pressure+responses+during+... -a08012731
So they pump and pump and their brains pop and pop. Just a note, to clarify some comments people are making in jest. Jest accurately! Lest we quest vapidly!