If it's been a while since you raised a good, honest sweat but really have no inclination to venture too far from your PS2, the Gamercize GZ Sport might be the answer. Connect it to your PS2, stand on the two pedals and use an attached controller to play whatever game you want. Here's the catch - if you stop pumping away on the pedals, the controller stops working!

We imagine that your heart rate might soar simply from the screen-smashing annoyance of having your controller die on you every three seconds, but let's not be cynical. The weak-willed among you (and us) will probably have to destroy any regular controllers to avoid a quick backslide into sedentary gaming bliss, but this might actually do you some good. However, with a starting price of US$159.99, can we suggest a quick walk around the block every now and then might be a better option?