Yes my right pec is smaller then my left which I have heard many times. I've had MRI's gone to many doctors etc. No answers. Doing many different things as suggested on the forums but there is one I can't figure out. When I bench either with a barbell or dumbells I can get my right pec sore but my right lat gets really sore to. My left lat does not. I really concentrate on form and have read many posts on technique. What am I missing? It may not be technique do to my shoulders problems but if it is technique what can I possibly be doing on my right side that makes my right lat sore but not my left?