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Explain the “hammer” principle of tennis

Many years ago, the hammer was the most widely used instrument in our ancient times. The use of the hammer fully explains the lever principle, which relies on three biological features:

One is the grip can be stable grip, the second is conducive to the large rotation of the shoulder joint, the third is the need for shoulder and arm muscle support.

Tennis and badminton are the best examples of these games:

1. Hammer principle

Leverage is used in practice and we think of it as saving effort, but it also saves distance. The application of hammer is mainly to save distance, not necessarily laborious.

When using a hammer, it is equivalent to doing an arc motion. When the arm swings at a certain speed, the longer the radius, the greater the hammer head speed, and the greater the impulse

We hit the ball with a tennis racket. When the angular speed of rotation is fixed, the larger the radius, the faster the head speed is

Roger Federer straight arm vs Andy Roddick curved arm

In terms of power acceleration, Federer has the advantage, known as the exertion lever principle;

In terms of power control, Roddick has the advantage, known as the double Bent principle.

2. Swing a tennis racket

The biggest difference between the hammer and the racket head is that the hammer is heavier and we have to swing it as hard as we can. And the racket head is not like the hammer head, many players do not know where to accelerate, how to accelerate. Realize the position of the racquet head, by turning the body, accelerate the racquet head, think of the racket as a hammer, hit it!

The double counter is like swinging a sledgehammer

Post time: Sep-27-2022