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    Ab Circle Pro

    The stomach muscles are one of the most common sets targeted by fitness gadgetry. That’s because to get rid of unsightly stomach fat and get that six-pack that everybody wants, you have to do thousands of crunches, and crunches suck. So there are dozens of devices out there that claim to get your abs in shape without the work. One of the goofiest is the Ab Circle Pro, a rickety contraption that swivels your torso around and claims to engage muscles that normal crunches don’t. The manufacturers got sued and had to pay out over $15 million in refunds to buyers.