There are human powered transportation devices and then there is SpeedFit. Anyone who has ever spent time on a treadmill knows how dull and tedious it can be. Now you can use your treadmill and get fresh air at the same time. The creators of this contraption have popped some wheels on a treadmill along with a steering mechanism. The question is if you are walking on the belt anyway, why not just skip the SpeedFit and walk on the pavement? The one possible upside is that you could incorporate a gearing mechanism that will allow higher speeds much like a bicycle. Nevertheless this device just looks way to clumsy and unsafe to be useful. I'll stick to walking on the road.