I almost went to see a doctor in early 2020 (cue but then the funniest thing happened). Lots of issues/complexity there too esp. carless in a lower density USA, guess I'll wait until there are autodocs or doctor worms or something that doesn't need forms/questions/multiple visits/uncertainty etc.

Last year I got the cheapest+lightest ebike with gears that I could find. I went 131 miles on the trail (that's with 250w assist, usually PAS 1 or 2) until the trail shut down a few months after I got it (as mentioned elsewhere). I had noticed some effect even by mile 100 (easier riding mostly, anything else is too nebulous to judge), but being so long without activity and I probably lost all benefit and then some.