I'll follow this thread closely. I'm 81. I have idiopathic large-fiber polyneuropathy, o no pain, but an unsteady gait. My right knee is a no-problem, 20-year-old TKR. My left knee, however, is packed with arthritis. Curiously enough, although my knee X-rays show serious damage, my left knee doesn't bother me much during my daily chores. When it does bother me (painful, yes, but hardly a crippling pain) is in the hours after I do PT with my once-a-week therapist. He and I focus almost entirely on building leg strength: weight bags, sit-to-stands, etc. My orthopedist is offering me a second TRK. I'm stuck at thar juncture, wondering: Do I get that second TKR? Or do I trust that long-term PT will eventually provide me with adequare leg strengthto counter my poor gait? Whenever my orthopedist asks that traditional question: "Is this situation (arthritic knee) so bad that it's interferring with the tthings you want to do?" My honest answer (at this moment) is: "I don't know." That's why I began in saying I'll be following this thread closely.. –Best wishes all around! Ray (@ray666)