I don't know, and I'm too pathetic to try. I have absolutely no body strength whatsoever.
But the real question is pull-ups. Everyone can do at least one push-up. But the pull-ups, when everyone is in that semi-circle staring at you as your weak little girl arms struggle to keep from falling and your fat little boy legs kick at air and the public humiliation has to end with "get down, zero," that's the damaging one.