Like many other bjj schools we do lots of push ups. I was thinking that I don't need to do them that much and possibly the amount I'm doing is counter productive. It seems that my left shoulder (once separated) locks up and I can't touch my elbows together. I've talked to my instructor and he's cool with me doing alternate exercises like squats, wall sits, and ab work when everyone else is doing push ups. My buddy seems to think that push ups are the greatest exercise ever and that it must be my form that's causing discomfort. I am considered a "strong" guy at my school (6'1" / 210 lbs.). I have really wide shoulders. Push ups seem to decrease my flexibility and cause minor pain. Why should I do push ups? I would rather make up a personal warm up program which would include body movement, stretching, and light drilling. I'm 41 and have had a slew of injuries. Are push ups and common bjj warm ups counter productive? I tried the search function and read the FAQ. I hope this hasn't been talked to death here. I'm usually hanging out in the grappling forum. Thanks.