Inspired by reports on the health risks of prolonged sitting, many people have turned to using miniature pedalling machines or elliptical trainers while seated at their desks. Unfortunately, though, sometimes those devices cause users to bang their knees on the underside of their desktop, or make them bob up and down while working. That's why the PediGlide was created.
The PediGlide has two plastic foot platforms, which slide forward and backward along rails on a metal base plate. Heavy-duty rubber bands run between each of those platforms and the base, providing resistance as users slide their feet back and forth. Rubber pads on the underside of the base help keep it in place while in use.
As a result of its low-profile design, the PediGlide could conceivably be used not just under desks, but also in scenarios such as long airline flights. It folds, for added portability.
The PediGlide is currently the subject of a Kickstarter campaign. A pledge of US$59 will get you one, when and if they reach production. Hopefully for its designers, it will have more success than the similar Glyder, which never reached its funding goal.
More information is available in the following video.