im sorry but i think this guy is an idiot...he makes good points yes but his examples are piss poor... If you compare the physiques of 100-meter sprinters against long distance runners, such as marathoners, you'll see that sprinters are just as lean (if not leaner) than their aerobic counterparts, even though they do little to no aerobic exercise.... so apparently sprinting is not an aeorbic workout... if you need a spotter, you're moving the weights too slowly and should lighten up....i guess hes never heard of cramps