According to the video, the way this device works is that the electricity blocks the message to your brain that you have pain, so you stop feeling the pain. What seems to be happening for me though is that when I use this on a sore muscle, the electrical pulses make the muscle jump or contract, and then loosen up. Sort of like it's wearing the muscle out so it can relax. I haven't had severe pain, so I don't know how it would work for that, but when I'm a little sore I do like to use this for 15 minutes as a massage. The pads stay on well, although after less than a dozen uses I can already tell that they aren't quite as sticky as they started out. I don't see replacement pads on Walmart.com but found them for $20 elsewhere. I don't know if this can replace other, more professional treatments, but if you have occasional soreness from working out or something, this could be a cheaper alternative to getting massages.
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