My son was a baseball pitcher. One day while on the mound his shoulder froze. He looked at me from the mound and said" Dad my arm wont move". I reached out to a guy here in Tampa that worked for the Yankees and the Red Sox for about 25 years in their physical therapy departments. Long story short, he came to the house, checked out my sons shoulder, and said, "I'll have him throwing a bull pen in the backyard in an hour, and he will throw harder than he was throwing before". With that said; he had him throwing in the backyard in about 45 minutes. Basically, he said "in most cases when the shoulder freezes up, it is the nerves around the shoulder that have locked up to protect the shoulder for some reason. What he did in the course of the 45 minutes was let the shoulder know that it was OK to release the "lock" on the shoulder. He had my son do a series of exercises while laying on the couch with a can of soup and resistance bands over the course of the 45 minutes, and my son has never had another problem with his shoulder since. In addition, he did throw faster than before. The guys name is "Hap" and everyone called him "Magic Hap" because of what he could do with shoulders and arms. He said most shoulder and arms can be fixed without surgery if nothing bad has been torn etc.......