"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." “Muscle stimulators do exactly what they promise—stimulate muscles,” Lori Diamos, M.S., P.T., owner of PT ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." “Muscle stimulators are worth the investment if you’re looking to take your workouts to the next level, ...

A muscle stimulator is a handheld or larger machine with connected electrodes. Larger machines usually only exist in therapy clinics or doctor’s offices, while handheld devices are used at home.