I've read quite a bit on standing desks and I'm curious if there is any study/research that shows, experimentally, that it's actually [standing] that leads to some of the proposed benefits. I only ask because I wonder if simply exercising while sitting [1] or in general [2] lead to the same benefits or if the very sedentary nature of the circumstances surrounding sitting that lead to these poor outcomes (which then are solved by standing).
[1] http://www.amazon.com/FitDesk-v2-0-Desk-Exercise-Massage/dp/...
[2] http://www.amazon.com/dp/B00B1VDNQA/ref=psdc_3407781_t3_B00C...
EDIT: Forgot to mention, when I say exercising, I mean during the same time where you would be sitting (e.g. during work, continuously)