Besides warming up your muscles properly, you are also grooving and strengthening your muscles and, of course, your strokes. The Pro Racket Pates are purposely designed to attach to the sweet spot of your racket because this is where you actually make contact with the ball. The repetitive grooving will help reinforce the precise muscles required to hit your shot, thereby creating muscle memory and better racket control which is vital to improving and hitting consistent ground-strokes, volleys and serves.