I had a hip replaced. My swing slowly changed before surgery as I tried to protect myself from the pain if I got in the wrong position. After, it took me quite a while to trust the new parts, but I slowly returned to my old rotation. There are some changes, my 150 went from an 8 to a 6, I think mostly because I still don't have a powerful hip turn. At 60,and not inclined to workout, I'll settle for my game as it is now. I've matched my best score at my home course after the surgery, and maybe slowing my swing down a bit will turn out to be beneficial in the long run.