Pretty sure the pool will really help you. I tend to get my swim out of the way then spend 15 minutes on exercises. Interesting thing has started happening for me in the pool, after triple joint replacements I would struggle doing balance exercises in the pool and that was getting worse a year before PMR showed itself, I had tripped over dog a few times when she was a bouncing pup plus X-ray had shown remaining joint was only at stage 2 but all ligaments were healthy and strong so I gave up telling medical people something was not right. Now I can stand on one leg ( either leg) for as long as I want in the pool without a wobble. Everything I read about PMR says it takes weeks, days or instant to show never says years but I am sure mine was starting to say hello a couple of years ago. Wait and see how you feel after the pool. Going back to 10 is a bit drastic. Hopefully you will get a natural high after the pool and that helps. Enjoy.