I am beginning to do some with light weights.  I have a prosthesis in my left shoulder and it came apart in a fall a year ago last February, and I didn't realize it.  I knew there was pain, but tried my best to ignore it.  I finally had it repaired last March and am just now able to lift a small weight and I do exercises with the theraband.  I walk and hike.  I had a very active outdoor lifestyle until the fall.  We prospect for gold and I used to do a lot of shoveling gravel and dirt and carried 5 gallon buckets of same.  I had been on LC 5 months before the fall.  I have remained on it faithfully.