I have a very nice adjustable GeekDesk provided by my employer, but I haven't lowered it to a sitting position for months. I generally have no problems standin

I have a very nice adjustable GeekDesk provided by my employer, but I haven't lowered it to a sitting position for months. I generally have no problems standing for long periods of time (assuming I have enough padding in my shoes), but my back will complain if I spend too much time prone (due to an injury 35 years ago). What I really need is more exercise, but when is that study going to come out? I'd love to add a treadmill to my work rig ;)