Neither group did any abdominal exercises. Unless you eat healthfully and exercise regularly, there's no evidence that using an ab stimulator will make a big change in your appearance.

Does Slendertone abs really work?

It also says that clinical trials found after four weeks that 100% of users reported firmer and more toned abs, 72% reported an increase in abdominal endurance, and 54% of users felt that their posture had improved.

Do Ab Flex belts work?

As a quick summary and recommendation, we can say that the Flex Belt works exactly as it should. With regular use, you will definitely achieve some firmness and tone in your core muscles. However, if you decide to buy them, do not neglect physical activity and a healthy diet, because they are essential to see results.