"I’m so frustrated because I believe I could regain my strength in my lower legs if I had new knees."

Oh boy, @rjack6618, do I relate! My knees, in my estimation, are what stand between me and recovering a modicum of leg strength. I saw my orthopedist a month ago––I was there for his nurse to give me yet another injection––and meeting the doc in the hall asked in passing if, at 80 and with large-fiber neuropathy, I'd "aged out" of knee transplant eligibility. I know I caught him off-guard. He stumbled an answer: "Oh, no, no. We could consider a replacement." Something tells me, if were seriously to discuss the possibility of a replacement and I were to honestly tell him about my balance issues, he might revise his thinking. In the meantime, I'll continue with PT, apologizing to my therapist for not showing more improvement. Oh, these dang knees. 🙂 –Ray (@ray666)