Kooky Item of the Day: Vibrating Exercising Machine?

Apparently, you stand on it and it shakes. Then you have to tighten all your muscles and then loose weight! I think it is kind of odd and unbelievable but who knows. I think I remember seeing these kinds of things in tapes of things from the 50's but I didn't think they were all that legit. So have any of you heard of this in modern times?