A small study from the University of South Carolina found that walking up one flight of stairs was roughly twice as fast as riding the elevator the same distance; the researchers chalk the difference up to all that time you spend waiting for the elevator to arrive. So make a habit or hitting the stairs, and you'll worry less about running late (and burn off more of that muffin, you grabbed for breakfast too). In addition, eat you fruits and vegetables, it may give you an extra 14 years to live.
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