You should wear the Flex Belt as advertised. Thirty minutes a day for the past three weeks. You can use it at work, at home, while exercising or making dinner. The belt contains three gel-pads that are pre-positioned around your core region. The pads cover the central abdominals and the external oblique muscles.

When the belt is operating, it stimulates these main muscle groups, which then send nerve signals to other neighboring muscles so that they relax and contract. It is the constant relaxing and contraction that tones the muscles and gives them more definition and strength.
You will feel a mild sensation along the abdominal muscles while the Flex Belt is in use. You have total control over how powerful the sensations can be. The intensity goes from level 1 to 150. As strength develops, the intensity should be increased.
Your goal of rock hard abs will be an ongoing process but The Flex Belt will be a very useful tool on your journey.
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The Flex Belt uses the same Electronic Muscle Stimulation technology used by martial arts legend Bruce Lee who swore by it saying that "Three minutes is like doing 200 push-ups."
Questions about Contour Ab Belt? Read this.