Agree strongly on the "prehab". Going in with muscles, tendons, and ligaments in as good a shape as possible makes rehab a lot easier. You start rehab from a lot better place. (Have been in PT enough to observe a lot of other people's outcomes, too.) Positive attitude is great, but muscle atrophy because of disuse or favoring it can make the return of strength and mobility take longer. I had not run in years because it was too painful, but I use a bike to stay in shape. I rode until the day before surgery (knee and hips) and am convinced that made a big difference from pre-surgery and then returned to it after surgery, during rehab, and for maintenance. Glad to hear there is a trend toward pre-hab these days. I know it helped my otherwise nonathletic B-I-L when I recommended it to him and he did it.