59 and started walking about 3 years ago, and after retiring last year went back to archery, which I've done for a couple of periods before work/family meant I couldn't dedicate the time needed.
I had dodgy knees from 5 aside injuries in my twenties, and walking caused a problem until I built up the muscles around them, they're better now than they have been in years. Archery I went to fast too soon and have something akin to tennis elbow. Slowly building back up again with the help of an elbow brace, still can't draw the bow weight I did in my forties but getting there.
Not sure what I'd do without some form of sport, probably just curl up and expire