Today, trip to dentist. 0.7 mile walk to tube station, sit for 45 minutes, get up no problem, 0.5 mile walk to dentist's office. Walk back, down 100 stationary escalator steps, not quite skipping down but at normal person's pace. Ssit another 45 minutes on the tube and walk up the hill home. Wearing light canvas deck shoes, it's hot here (well by London standards, 20+ degrees). All really without having to think about it. The clicking and clunking we are all familiar with just about faded away now.
But recently developed a niggling pain down my right leg on the outside, over the last three weeks or so. Couldn't work it out for a while -- but went back to concentrating on my pedal stroke on the bike, which I'd gone back to taking for granted. I'm now fairly sure that my body was trying to revert to my old pre-surgery style where I favoured my knee by pushing outwards to the right, so the right knee was sticking out slightly. Now consciously keeping the leg straight has reduced the pain 95%. I reckon the 5% is residual due to strain and will soon go.
This is IMO where physiotherapy should score; not in training but in coaching. Helping us to walk and stand (and maybe cycle too) correctly during the recovery process, to correct errors of posture, etc. We all of us to a greater or lesser extent compensate, pre-surgery, for the pain and crippling nature of defective knees and it's not obvious IMO that we revert to correctness afterwards.