Here are some easy exercises that have helped me and others with the numbness thing. I originaly got them from classical pros who'd been playing for decades:

1) Work on your posture. That's the most critical. osture while playing, driving, computing.

2) Stand with feet at shoulder width, arms down at sideas, relaxed. Raise both arms in front to shoulder height. Let go and let arms drop naturally and let them swing to rear as far as comfortable wiithout forcing them. Repeat at aprox 80 BPM. Try for five minutes at first, then extend to fifteen minutes. Focus on breathing fully and rhythmically.

2) Stand as above. Swing arms loosely to left as far as they'll easily go, sort of letting them swing around your trunk. Repeat to right side. Continue to cycle left and right in rhythm, extending the swing as you warm up. Again, 80 BPM is a target rate, five minutes top start and extend time as comfortable, be sure to breathe fully and rhythmically.

3) Dance! Seriously. Get up from your board frequently and dance to whatever turns you on, just start gardulaay and work up to something that gets the entire bod moving in rhythm. and don't forget to breathe as above.

4) Walk. Walk at least three times a week for 20 minutes. Get in a groove that allows your extremities top swing loosely and freely. Almosty like a dance. Whenm you find the right pocket for your physique, you might find it really gets creative juices flowing. the boddy makes a great percussion section as a foundation. Just listen to the rhythm of your hands, feet, etc.

All this may sound like snake serum, but these guys I learned it from toured and recorded successfully for 5-6 decades and stayed limber. I've noticed when i don;t follow this regimen, the tingles return.

Hope this helps.

(And, Boo, if you'll forgive me, what about a trip up into the higher country or over toward slickrock country once in a while? That air down there in GJ is getting pretty tainted. I know that every time I go down there it gets me after a few brisk laps around Sam's Club or the mall.

BC