About 12 years ago I had a shoulder injury that I think was caused by working out improperly on an exercise machine. It got so bad that I couldn't raise my left hand above my neck, so even trying to comb or wash my hair was an effort. We moved to a farm about this time, and there was a lot of work to do and horses to play with and so I wasn't able to give the shoulder much rest. This went on for about a year, the doctor suspected a bone spur but wasn't sure, and finally I had surgery. It healed quickly and completely and since then I've had no problems.