I’ll chime in, had both my knees replaced last year, left on Feb1 and right on April 25. Im 73 and in good overall physical shape. Was a 5 day a week runner for more than 20 years, hence the new knees. A couple of observations, first and most important picking your surgeon. I’ve read about several TKRs going south because of the surgeon. I’m fortunate to live in the Greater Boston area and had several well vetted choices. Secondly find a good PT he/she will be critical in your recovery. I did pre surgery PT and, for the most part, was in good shape prior to the replacements. I was a pretty consistent rider of 20-25 miles 3 or so times a week. No sugarcoating but the recovery can be tough. Obviously we are all different so your experience may differ but a few things seem consistent. Sleep can be tough, I spent the first four month sleeping in a recliner as I couldn’t get comfortable in bed. I used the pain meds for about 7-10 days and they helped. Had a good in home PT for the first two weeks. Young guy who actually cycled cross country for charity so he was empathetic. There seems to be conflicting opinions about PT, should you force your knee to the point of extreme pain in order to achieve greater range of motion. My PT did not ascribe to that theory and it goes way back in time. No Pain No Gain is common amongst athletes but recovering from surgical pain is different than an injury. Your knee has been through pretty significant trauma. Your ROM will return over time. The other challenge for me was just having patience. I’m 11 and 8 months into the recovery and all is well. I was riding outdoors 4 months after the second surgery, and was riding indoors well before that. I am very happy I did this and glad I took the surgeons advice about scheduling them fairly close, best decision besides choosing him, I made. While I could cycle with my old knees, almost everything else was painful. Would like to travel a bit more and see some more of the planet and now feel confident that I will be able to do that. Good luck whatever you decide.