I've always been in awe of the cleverness of the title of this post. It's a Scott Adams book title (a Dilbert cartoon collection book). The fact of the matter is, if mouse time built up arm muscle, my peers and I would be walking around like a giant fiddler crabs.
At any rate, now we can be a lot more comfortable after a few hours of gaming, coding, or (if you've gone to the dark side like me) managing your inbox. The
Air Cooled Mouse Pad might help.