constant moving back and forth and back and worth, video games are suppose to be relaxing not to make you sweat, i understand its interatcive but comeon!? health freaks invited this worthless machine to make youngger kids skinny again cause all they do is sit around and eat bon bons, if you ask me you shouldnt have to sweat while playing a game, unlesss its close math playing halo and someone is trying to snipe you out.