Hello, I am having some pain in my left shoulder that I woke up with Friday morning. Originally it was both shoulders and I figured it was just soreness because I completed an extremely rigorous back workout Thursday afternoon, there was no pain post workout. My right shoulder is nearly back to 100% but unfortunately the left still continues to be very sore today (Wednesday.) The soreness seems to be coming from my infraspinatus muscle and I cannot lift my left arm above my shoulder without pain. It hurts the worst if i try to lift my left arm up and do a front bicep pose. I guess that is when the external flexors of the rotator cuff are very active. I am a bodybuilder, but this was not an acute injury. I have full strength with resisted lateral rotation, and no pain at all. The pain only comes when i lift the shoulder above my head. My ROM is coming back very slowly.