I suffered abit of tennis elbow from playing golf. So I bought this strap from Amazon just to give it a try. Really, it said that on the tin, after I finished the whole game of golf, I didn't feel a thing, just a little bit tired on my muscle but that is normal. But once I worn it, I had to keep it on for the whole day until I went to bed, otherwise, the discomfort would come back soon after I took it off. The only draw back is it is a little too big for my forearm because I am a woman size 8/10.