These definitely work! Anytime I start to get tennis elbow or feel pain coming on, I use these a few times a day, and the pain starts going away within a week. I originally thought they were a gimmick, but after dealing with elbow pain for months, I finally gave them a try. After about 5 to 7 days, I could feel the pain easing up. Without them, the pain gets so bad you can't even lift. Don't go crazy buying every color, you just need one. I have the blue one and it works well.
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