Amazon カスタマー 2 There is a comment in the product to say you can use it on your arm but you'd need really big arms as the Velcro doesn't work for that width (unless you are very fat or are a body builder I guess)You'd have to have very slender thighs to work there too so really only for calves.If you want to use it for calves then it's okay, not great. makes some noise.