de33f48b_r_Comparison___TheFlexBelt_com__0
[The Flex Belt®] YES. Multiple Clinical Trials. In a 6-week clinical trial: 100% of the participants reported that their abs felt more toned and firmed & 92.3% felt the firmness of their ab muscles increased. [Ab Coaster®] NO. There are no published 3rd Party Clinical Studies. [0] 
Are there any 3rd party clinical trials to back up the claims?
AB Coaster Comparison | TheFlexBelt.com
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