Has anyone tried to get hypertrophy of their pecs and arms doing push ups alone? If you did have success, how many push ups did you do per day?
Does rezistant bands count or anything heavy on your back like a sandbag or two, LOL (y/k).
A good buddy of mine did 2 months in Harris county and came out about 12lbs heavier from doing pushups [400-500 a day] and pullups off of the back of a staircase. He was also getting cans of tuna from commisary so he could eat 4-5 meals a day and not drinking.