Hi there. It's really difficult to predict what will happen to you in the next ?40 years. I've been a physio since 1976 and there's no way I'd do full time. My thumbs, fingers, shoulders and back wouldn't take it in outpatients with strokes and loads of manual therapie. Having said that, and thinking of my peers and we are all pushing 55, very few have given up physio alltogether. The one with 2 laminectomies before her finals had 4 kids and works much harder than me! There's enough opportunity for changing direction I think. Keep up CPD, pay for more courses yourself if you must (here in CH I've paid for everything for years), you can change to advisory functions, teaching, whatever. Some of us will never have big problems, some will. Hope your tendons hold out for as long as possible and good luck!
regards JM