did anyone hear of the Ab BELT? its sumthing u tie around your waste and it does situps for u .....u think it works:...it contracts your ab muscles while sitting down and watching tv....if along wit cardio and a good diet you think it can work?? i rtied good diet wit cardio and still dont have abs..my BF % is low and mabye the ab belt can work..anyone try it ? if so tell if it works or not.... thanks