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In a 6 week clinical trial done with The Flex Belt Ab Belt, 100% of the participants received results. 100% of Flex Belt users reported that their abs felt more firm and toned by using the Abs Belt. 92.3% of Flex Belt users agreed the firmness of their abdominal muscles increased as if they just did an Ab Workout. This is the exact same electronic muscle stimulation technology that physical therapists use to help rehabilitate their injured patients muscles. The Flex Belt Ab Belt flexes your stomach ab muscles for you so they get a very concentrated work out.