HAHAHAHA!! I actually bought an electrical muscle stimlulator a long time ago. I think they used them in rehab. They actually stimulate the muscle alot.
I dont know if it did any good. It hurt alot and burned the skin sometimes if their wasnt complete contact or if the electrodes were drying off. It was like a second and a half pulse and then a pause. If you turn it all the way up the muscle would contract so hard you'd scream. haha
20-30 min of that pulsing would tear up your muscles.
I used to show people by placing the electrodes on their forearms and then itd pull their hands down when the muscle contracted .Then Id turn it full blast and they would be in agony. I was such a punk.