Strange, I never do these, yet have another 30lbs of lean mass than the guy doing them today at the gym?
Who does this shit?
15min later, I see the guy with 2 small core balls in a push up position, rolling them slowly across the floor.
When are people going to realize, this doesn't do squat. You want to strengthen your "core". Do sit ups and lower back extentions. People will do anything to avoid lifting some real weight.
BOOOM!