Come to Samui. She could go on a 'retreat', do lots of yoga-ing, have a gentle colonic irrigation and sit saying ummmmmm to the sunrise. You could just look at hot young ladies without needing to do all that hard work in the gym. You could even get some 'theraputic' massage to fix your shoulder or failing that, some non-theraputic massage to at least take your mind off the pain! Win-win. I feel a new career as a life coach in the making :-)
I once tried Tai chi with the MiL and the rest of her old ladies gang. It's so slow and un energetic, I just kept falling over and looked a twat. There's a reason god gave us two legs...
RE: Gentle Exercise