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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.
Undoubtedly, ab machines are useful to strengthen and tone the abdominal muscles, but they do not burn belly fat. You may have strong and toned core, but you will not be able to see those muscles since they are covered with fat. There are three things you have to do in order to get flat and attractive stomach. 1).