I had surgery on Halloween. Doc says I can ride at the 3-month mark (Feb 1) if I’m careful. Knowing, of course, that I could send myself right back to the OR. But riding is also great therapy, since it’s retraining atrophied muscles just like the stationary bike is. I can do squats fairly easily now, they bother my wimpy unused quad muscles more than my knee itself. I can bend it almost all the way; I’m lacking only a few degrees of full flexion. My doc and my therapists say I’m doing very very good and am ahead of the game strength wise. I am going to the track, not trails, since while I won’t be good for much jumping, there are just too many unpredictable things on the trails like rocks, roots etc. I’ll also be riding a smaller bike than my own. I’ll be careful! I promise!