I used to go to swimming club every day and we had to do 30 press-ups before we got in the water every time.. I started that squad when I was 10 years old... Safe to say I was a butch 10-year-old.
But I still do them now, even though I quit swimming about a year ago; if I'm pumped in the gym the most I've ever done was 100 in one go... and that was with somebody shouting encouragement and I couldn't move my upper body for the next few days.... gains tho right??