Hello, I am also new to this forum. I came across it while searching for information on PKR and TKR I am 45, and was a racewalker (2 full, 6 half marathons numerous 10Ks), until aroutine 4 mile training walk left me in such bad shape I was wondering if I had RA. I was registered for the Rock N Roll Savannah 1/2 marathon and had to pull out. I have had knee problems since college (theatre knee), when I was thin and not running. Oddly, I have never had an injury of any kind that I can recall, or any previous surgeries. I had no idea that it would end up like this. I progressed from chondromalacia in 2004 to moderate OA now. I have no cartilage under my knee caps at this point, the rest of my knee is not in great shape, and have daily pain. During my most recent visit to my OS this summer, he told me to stop racewalking and take up cycling and water aerobics. I took up racewalking to save my knee ironically. He does not want to talk about surgery until I have tried everything else. He did not want to do physical therapy, but injected my knees with Synvisc and gave me a cane and Celebrex. I have refused to accept that I can no longer do what made me so happy and kept me in shape. Since that visit, I have become quite depressed, as my pain has not improved, so I decided to get yet another opinion and see yet another surgeon about PKR, as I was told I was too young for TKR. I saw my internist today and he suggested that I drop about 30 lbs before making the final decision to have surgery, since I am so depressed (I am 5'8" and 215lbs) Fortunately, he did not discourage me from considering surgery, but has encouraged me to make the decision when I am in a better state of mind. I am inclined to agree. So technically, I am not pre-op, but will very likely in probably in the next 6 months. I am grateful to have found this forum. I used to be quite active, and would like to be again. If surgery allows that, so beit. I would be curious about your thoughts about weight loss before surgery, and if it makes a difference. I understand the physics behind weight loss as it relates to what the knee sees, but at this point the damage is done. I have to lose at least 40 lbs either way for other health reasons, but was just curious. I look forward to any insight.