Phil,
Thanks for the post. I've seen other posts about drummers with pain of different sorts, and while its always good to go to a doctor, many times, especially guys, we try to self diagnose ourselves, especially, if the pain isn't that bad.
Anyway, I can relate, my wife and I do yoga or pilates together at times, and it is very beneficial to my body and drummer. The streching alone does wonders.
I also have wrist and forearm pain from typing which is why my posts usually are not very long.

I also find that if I have not done any yoga or streching that the pain from typing is greater. So if I keep the practicing regular and also a workout, everything feels great. Its just that life, work and family make my schedule of workouts and practicing unregular.
While we may use it to keep our arms loose and pain free, I think that yoga and other workouts are a great preventative medicine for other drummers .