>Interesting, that is what my mother does also. The chiropractor recommended it.

I swear by it. I haven't been to an osteo since I discovered it. Sometimes when I've overused my mouse hand, and my forearm muscles are aching, I even sleep with my wrist on the balls. You can give yourself a good shiatzu-like massage with the balls. Whereas a person would move his hands over your muscles, you move your muscles over the stationery balls. Saves a fortune!