I'm totally not sold on the practically of so-called walking desks.<p>Reading text on a screen whilst your head is bobbing up and down, trying to make fine-motor-movements to click and type whilst walking, sounds like a recipe for low productivity.<p>Why not get 3 hours of real work done, followed by 1 hour of real exercise, rather than 4 of neither?<p>Or if you're determined to combine (computer) work with exercise, a reclined exercise bike you can slide under a proper desk might be the better bet... at least your upper-body will be stable then.<p>Kudos for at least thinking about your health, anyway!