I had some frozen shoulder and partial tear in rotator cup. I was sick, bed ridden for a while, weak. I don’t know how I got the partial tear. First I went to my chiropractor, and he used electrical stimulation of muscles and acupuncture. Some help. But finally went to physical therapy, they helped me stretch, move exercise with some pain, but no reinjuring. Heat to loosen muscles, ice pack after exercise as I remember. The therapists were trained in what to do. I visited about 2-3 times a week for a month or two. They gave me home exercises, stretches. I avoided surgery. I may never be as strong as I once was, but regularly lift about 50 pounds with that arm as needed.