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Ab belts may cause muscle contractions if used properly. But the belt alone cannot produce six-pack abs. The real challenge to ab definition is the layer of fat that lies right under the skin, hiding muscle tone.
Belt Technique. In order to take advantage of your belt, itâs important to use the valsalva maneuver. This means taking a big gulp of air into your belly, than trying to exhale forcefully with a closed glottis (throat). The pressure should push your belly into the belt and increase the pressure around your midsection.