"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 ...

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Already a staple for pro athletes, electric stimulation--sort of like shock therapy for triathletes--is now being marketed to the mainstream. Video: Zapped to glory Michael Kanellos is editor at large ...

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.