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.