The epidemic is closed at home, talk about those things about the internal rotation of badminton, there are probably two voices in the whole circle, one is to deliberately pursue the details of internal rotation, and even rise to the level of force; the other is to think that only whipping force, internal rotation is only a side action, then whipping and internal rotation is how to exist, and listen to me one by one!
1) Definition of action
First, let's look at a few movements related to the arm, which can be divided into two types.
Swing arm action: the large arm is abducted and adducted, and the small arm is flexed and extended
Arm movements
Forearm movements
Spiral arm action: the large arm is rotated inside and outside, and the small arm is rotated forward and backward
Arm movements
Forearm movements
Used for whipping is the elbow extension in the swing arm movement, corresponding to the muscle triceps, selective single;
The forearm is flexed and extended
Stretcher muscle groups
The action used for internal rotation can be the internal rotation of the large arm, or the front of the forearm rotation, corresponding to more muscles and more choices.
Rotate the forearm
Forearm spin anterior muscle group
Big arm rotation
Indyclination muscle groups in the large arm
Through the analysis of the action, the internal rotation force seems to be not just a side action, but one of the important actions.
(Note: Some technical actions will also use wrist extension movements, as well as finger bending movements, which will not be elaborated in this article)
2) The meaning of rotation
From the perspective of force, the whipping force is through the torque to exchange for the swing speed, the need to have a certain swing arm distance, the force is longer; and the rotation arm force is through the torque to exchange for speed, the force is shorter.
Swing action
From the rotation level, the whipping force is affected by inertia leading to the stability deviation of the joint, and the swing of the wrist and shoulder when pressing down is difficult to control, resulting in unstable landing point and even the risk of injury, while the spiral arm action can build a stable platform similar to a gyroscope, which is conducive to better locking the joint, controlling the landing point, and avoiding injury.
Gyroscope stabilization platform
In addition, the rotation of the batting surface is more stable than the line and speed of the ball on the front flap.
The way to hit the ball that rotates the flap
The face rotates to hit the ball
Judging from the effect of rotation, if you can effectively combine whipping and rotating force, the efficiency seems to be higher.
3) Teaching of the spiral arm
Since the spiral arm may be important, why is many teaching reluctant to talk too much? I guess there are several reasons for this.
First: the main purpose of the beginner stage is to complete the muscle memory of the whiplash force chain, and too much emphasis on internal rotation will destroy the overall coordination of the torso;
Second: as long as the force action can be completed correctly, from the positive whipping surface to the positive hitting force, it will naturally produce a certain internal rotation force due to the grip force, and there is no need to deliberately teach;
Third: the whipping force has a single nature, can form an effective teaching template, more conducive to teaching, on the contrary, the rotation arm force has diversity, too many applicable scenarios, teaching difficulty, teaching direction is prone to deviation, is not conducive to the homogenization of teaching;
Fourth: the essence of the rotary arm force is also a kind of whipping force, but the form of force is different, so it seems that there is no mistake in saying that the power of badminton is only whiplash.
4) The case of the spiral arm
Of course, I personally think that when the level reaches a certain level, it is still necessary to understand the role of the rotary arm, after all, there are many active scenes, and the following will list several technical cases.
Heavy kill: in the swing stage by whipping force to increase the swing speed, and in the batting period through the rotation arm force to increase the swing acceleration again, many professional players in the heavy kill, you can clearly see the action of the big arm in the internal rotation;
Spiral arm kill ball
Gear: When the position or batting point is not good, the effect of whipping force becomes smaller, and the main force of the rotary arm is needed;
Twist the arm to draw the ball
Pick-up: Conventional pick-up and shoot according to the thumb top of the backcourt force is no problem, and even do not need to rotate the arm force, but when you need to defend the rebound, when there are requirements for the ball line, the grip and batting method need to be biased to rotate the force (in fact, the finger action is more)
Pick-up and kill changes
Spin back and forth
Concealment: In order not to let the opponent see the face of the shot, some players will deliberately turn the face of the shot at the moment of hitting, or even do not turn the face of the shot to hit the ball, so as to achieve the purpose of the concealment of the ball, of course, can also be reversed operation, unexpected.
Change the racket to push the ball
Change the racket to hang the ball
All in all, existence must have its own meaning of existence, everything can not be generalized, whip power and spiral arm force have their own uses, excessive pursuit is not necessarily a good thing, I hope that everyone has a clear understanding, do not be taken astray by the outside world's remarks, and finally say, Shanghai refueling !!!