i was squatting a couple days ago, and i lift the bar up, and move back, do one rep, and then while starting the second squat, get some acute pain near my shoulder blade. talked to some people, tried to get more info on it, but it sounds like a muscle strain. i can feel it when i do almost anything with rotation of the upper body involved (sleeping, lying down, driving, walking). doesn't hurt ALL the time, but i definitely know it's there. anybody have any experience with this? tips/pointers?