Hey guys, My husband's got impingement syndrome in his left shoulder and nothing has helped so far. It's been a problem for over 4 years now and is troubling him in his every day life and at night. He's fairly muscular and is already doing lots of excercises for his shoulder, arms and back. But seeing this sub made me think that flexibility (or lack thereof) could be the problem. What kind of excercises would you suggest?