I will not argue that use this product will give you muscle fatigue\/burning when use . do that mean you be go to get rip result ? absolutely not . my friend stupidly go out and buy one of these . he use it religiously every day because it tire he out when he use it . I use it once and could not help but laugh at the product . the fact that people believe this product will give you rip muscle , as this product be market , be laughable . every review on here harp about the burn they feel after use this . guess what ? hold you arm straight out and move they in small circle for 60 seconds will give you more a burn than this ever will . go do that for 10 minute a day and tell I how `` rip '' you get do it .