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.

Do electronic muscle stimulators really work?

Do they really work? A. While an EMS device may be able to temporarily strengthen, tone or firm a muscle, no EMS devices have been cleared at this time for weight loss, girth reduction, or for obtaining "rock hard" abs. Q.

Can you build muscle with electrical stimulation?

EMS (electrical muscle stimulation) is a machine that delivers a stimulating pulse to your muscles. ... Many athletes seeking a competitive advantage use EMS to build muscle faster. Since EMS can contract a muscle far longer than what an athlete could do themselves, it can grow more muscle and enhance training sessions.