Thank you – lots of suggestions! Hopefully enough to instil confidence that it’s worth going back to the doctor’s. Especially interested in the cycling – he used to run a lot of half marathons, and I think that a lot of older ‘athletes’ seem to transition from running to cycling. He was considering it just as a replacement for running, but it would be fab if it actually strengthened the knee.
It’s good that there are things that can be tried without going straight for knee replacement.