Sorry to hear that man. I hope you aren't giving up on exercise coz of pain. Maybe you can go find some more yang forms or something. How old are you? But I can totally see why you would leave an external style because of hip problems. Maybe you need some titanium in that b1tch!
I fear for my knees. I really do. Maybe I'm being paranoid, but I still wear tensors when I run. If I can't flip around, life as I know it is over. It would be good for some of my projects that I'm building tho. lol Lots of inside time I've got so many ongoing projects that are just waiting for that one part that I need to find or fab.