Electrical stimulation has long been used by physical therapists to rehabilitate muscles that have weakened after injuries or surgery, and scientists say claims that it works muscles are credible. But extravagant promises such as creating rock-hard abs, and fat loss, aren't supported by evidence, scientists say.

Do Ab Stimulators Really Work?

Ab stimulators, a type of electronic muscle stimulator, are devices that can make your abdominal muscles appear firmer and more toned by electronically stimulating them. However, they won't help you lose weight, or get “rock hard” abs without diet and exercise.

Does Contour Ab Belt Work?

The technology used in the Contour Ab Belt simply won't build six-pack abs. A mild electric shock will make your muscles contract, and they will appear tighter and firmer, but the effect is very temporary.