hi all just wondering if any of you have heard or tried vibration machines{no not that sort lol } they are about the same height as a treadmill and half the length, you stand on or sit on them plus other positions and is supposed to be good for circulation, metabolism and i forget what else,they are quite expensive so i don't want to get one unless i'm sure, i had asked on a site here in oz buy only 1 person replied and that was to say she wondered the same thing ,so i'm hoping it has been around longer in america and somebody may know about it ...jenny