is, walk all day? stand? won t that hurt my feet? won t i sweat? you walk at very slow speeds. it s just like walking down the hall and you don t sweat when you walk down the hall, you won t sweat when you walk on a trek desk. reporter: the trek desk costs about $500. but dr. elizabeth joy believes the health benefits could be priceless. when you re walking you re burning about twice as many calories as you are sitting. walking while you work should help people lose weight. reporter: gary tuchman, cnn.
reporter: david lee walks 25 miles a week without even leaving his office. it s quite comfortable just to walk all day long. reporter: lee owns a trek desk, a height-adjustable work station designed to fit over a treadmill. it allows users to type, talk an think on their feet. when people come up and see it, initially their reaction is, walk all day? stand? won t that hurt my feet? won t i sweat? you walk at very slow speeds. it s just like walking down the hall and you don t sweat when you walk down the hall. you won t sweat when you walk on a trek desk. reporter: the cost is around 500 mu. but dr. elizabeth joy believes health benefits could be priceless. when you walk, you burn twice as many calories as you are sitting. walking while you work should help people lose weight. reporter: gary tuchman, cnn. the trek desk costs $500 but