Everybody knows that sitting all day long at work is not healthy. There are plenty of decent standing desks available on the market that allow you to work in a more active fashion. The WalkTop Treadmill Desk takes it a step further by letting you work while walking on your treadmill. It fits most treadmills and offers adjustable height and incline.
The WalkTop is light and compact. It is easy to assemble, attach, and remove. The desk has an anodized aluminum and steel frame and can support up to 50 pounds. Not cheap, but the WalkTop does allow you to work in a more active fashion.