I think the theory is that because inactivity is bad for you (whether sitting or standing), a small amount of constant motion mitigates the effects of working o

I think the theory is that because inactivity is bad for you (whether sitting or standing), a small amount of constant motion mitigates the effects of working on the computer for hours on end (which exercise does not make up for). Enforced, occasional breaks is more practical imo. I'd also find it hard to focus while on a treadmill. reference: http://ergo.human.cornell.edu/CUESitStand.html http://ergo.human.cornell.edu/CUESitStand.html