Nitrofit Vibration Trainer
Vibrating has been a fitness gadget standby for decades, going back to those weird machines with the wiggling belts from the 1950s. The obtuse scientific principle is that the vibration will cause your muscles to tighten more and work harder, but there’s not much hard evidence that it actually works. One of the silliest modern incarnations of this concept is the Nitrofit Vibration Trainer, an electronic floorplate that you rest parts of your body on while you exercise. Needless to say, it looks totally ridiculous.