One thing many web workers have in common is that we're also chair workers. It's not too likely that you're out in the sun working up a sweat as you go about your daily job. More likely, you've gotten engrossed in some intricate online task, and by the time you look up and realize it's past dinner time fourteen hours have gone by without you moving any muscles other than the ones in your fingers. While this may be great for your clients, it takes its toll in flabbiness, sore backs, and repetitive strain injuries.