Here's a great gadget that helps your wrists, hands and arms
Sitting at a computer, typing every day for years has been wearing away at my hands and wrists. I finally decided to do something about it and one of the things I'm using is the Dynaflex Powerball. This thing is really cool. You spin the inner ball and then move your hand back and forth in an arc and the gyroscope inside starts to spin like crazy and the ball suddenly feels heavier and as if it's trying to get out of your hand. It's amazing how much effort it takes to keep in going. But it's a lot of fun - just don't over do it.