What does it mean to flash your wrist when playing badminton

Shake your wrist so that you can hit the ball quickly!

Standing wrist is that the back of the hand and the forearm have an angle (the composite of extension and extension in the figure), the role is to provide support, the wrist has no muscles to rely on the forearm muscles to move, and the muscles behind the wrist have a certain tension, which can better support the next step. The second is that when the wrist is straightened and the forearm is not angled, the racket movement is driven by wrist force (in fact, the force of the forearm muscles is generally accompanied by the internal and external rotation of the forearm).

Stop, fast, tight. Sudden braking of the wrist and instant clenching. The more abrupt the braking, the better, the faster you grip it, the better, and the tighter you hold it, the better.

Then relax to finish the shot. The faster the braking is fast, the higher the effect of energy transmission, the faster the grip is held, the faster the brake in the hand, and the greater the angular momentum of the racket head because of inertia (just like sudden sudden braking, the people in the car will fly out, and the sudden braking of the racket handle will make the racket head suddenly accelerate to hit the ball--- the role of the middle rod of the racket is reflected). The grip is tight, so that the hand and the racket quickly become one, reducing unnecessary cushioning, and the power transmission efficiency is higher.

To experience the power of the wrist flash, you can sit with your elbows propped up on the table, similar to the wrist wrench and swing the racket in your hand. You can experience the difference between the power of not flashing the wrist and flashing the wrist.

After locking the elbow, the forearm paddle rotates with the elbow as the fulcrum, and after the wrist brakes suddenly, the paddle rotates with the wrist as the fulcrum, and the paddle head will suddenly accelerate a lot. Because the head of the beat suddenly moves from a large circle to a small circle, because the radius becomes smaller, the angular velocity increases, and as a result, the angular kinetic energy increases (the motion of the head is a circular motion, so it is described by angular velocity. Angular velocity can be expressed by the ratio of the angular displacement of the moving object and the center of the circle δ and the corresponding time δt, t, the angular kinetic energy formula ek=1 2j 2, j is the moment of inertia, is the angular velocity, and the moment of inertia is related to the mass of the object, so the attack slap head sinks, and the ball is powerful).

Most people think that the paddle is a hard object and not a rope, but when the brake is suddenly stopped, the paddle stops. The actual racket is not rigid and elastic, and after sudden braking, the energy is completely converted into the deformation of the racket and the acceleration of the racket head, and then transferred by the racket head to the ball (if the brake is not made, part of the energy is still consumed on the movement of the hand). This is the difference between good and bad shots, if you take an aluminum alloy racket from a supermarket, it is estimated that the sudden braking will destroy the wrist, you look at the deformation of the racket stick in Figure 2, of course, the general amateur can not play such a deformation, and can not experience the deformation of the racket stick.

In addition, because of the sudden clenching of the fingers, the paddle has a pivotal rotation with the index finger and thumb as the fulcrum in the palm of the hand.