Desk pedals - anyone use them?

mstifb

I saw on Amazon one day while just browsing desk pedals that you can place under your desk and pedal while you work. Sounds a little crazy to me. :ohwell: I work in an office and know you really can't get a cardio workout with these but wonder if you can really burn some calories doing this or is it basically like shaking your feet/legs while you sit? Anyone use them before or know someone who has? :flowerforyou:

Here's the link: http://www.amazon.com/s/?ie=UTF8&keywords=desk+pedals&tag=googhydr-20&index=aps&hvadid=17011392235&hvpos=1t1&hvexid=&hvnetw=g&hvrand=19207216471805293609&hvpone=&hvptwo=&hvqmt=b&ref=pd_sl_5k2gwlw17k_b