Many of the exercises incorporate the mouse, the keyboard, and the monitor. Forget the bench presses. Try a little keyboard kung fu, dance-mat pop-up-ad blocking, or light-saber fencing to tone up your abs and biceps. meatcity.co.uk/nerdgym/gym.swf
PCs as exercise equipment
Meatcity's tongue-in-cheek online exercise manual gives a workout regime designed with the nerd lifestyle in mind, sort of.