Saw this infomercial this morning for something called Abtronics. It's one of those pulsating belts that are supposed to pulsate your stomah muscles. Claimed that if you wear it for 10 minutes, it is the same as 300 crunches. Has anyone tried anything like this? I do abs twice a week - am pretty lean all over except 1" above my navel and 2" below. Any suggestions?