At 81 I still play pickup basketball 2-3 times a week. Slowing down some but set a lot of screens/picks and look to get assists. Shooting smarter, too.
In my 30s, 40s and into my 50s I was a semi-serious runner, training regularly and racing frequently. Then a mild arthritis in the left knee caused the repetitive motion to become too painful. The b’ball doesn’t hurt unless I overdo it- a fourth session in a week will have it complaining.
That is fantastic. If you’re athletic in youth, it follows you into older age. I was also a runner, but can’t run any longer. I try to walk a 5k every or every other day.