Mastery is essential to self-actualization. But all routes to Mastery are predicated upon physical existence, physical integrity, and a minimum quotient of physical health.

The Barbell Prescription includes a conditioning component. For some Athletes of Aging, this will mean a sport or physical discipline: "Lift weights and play your sport."

Get strong. Then USE your strength.

Practicing martial arts is effective self-defense...against time and unhealthy aging.

Yoga practice meets SOME exercise prescription criteria. If you like it and tolerate it--do it!

If swimming is (or might be) your Thang, I can recommend it without reservation.

You can and should do Olympic Lifts, IF you meet these three criteria.