"Sitting is the new smoking," according Runner's World magazine. Recent studies show that sitting for more than 6 hours a day increases mortality rates for women by 34%, regardless of how much physical activity you engage in otherwise. What do you do if your job requires you to work at a desk all day? You may have heard of the standing desk, but what about a treadmill desk? One NY Times reporter burned 300 calories before lunch by walking at a pace of 1 mile/hr!