Also consider Ted's (W124) advice. I used to practice a martial art and found it very rewarding and always a challenge. You simply cannot BS yourself or anybody else when you suit-up and spar hard with serious students. Especially when you're older and spar with somebody your age--ouch!

Meditation is a huge challenge for me. I just haven't the nature for it. As close as I can get to meditation is Tai Chi, which coincidentally, is also the closest I come to martial arts. Old farts break easy and are hard to repair.