At tyhe gym i used to work out at when i was 16 there was a guy we called big Ed he wasn't religious but he took part in that.He was unbelievably strong this is no exaggeration he was about 6'9'' 400 lbs and believe me he wasn't fat.He never used a belt during squats he was able [and this was yrs ago] to do 825 lbs squats for reps