The basic posture before forehand pull is that the left foot is slightly in front and the right foot is slightly behind (taking the right hand as an example). Generally, the racket is placed in front of the abdomen, the center of gravity is between the feet, and the body leans forward slightly to facilitate the departure. Abdomen, chest, knees slightly bent, but don't squat, keep a high center of gravity.

Moving center of gravity

When the incoming ball approaches the net, the center of gravity begins to move with the movement of the arm. When the center of gravity moves, the waist turns slightly, but don't turn too much. The body has a certain inclination, as long as you feel the center of gravity on your right foot. After the center of gravity moves to the right foot, the right shoulder sinks slightly. The support legs are slightly bent, but not too much, so as not to cause the center of gravity to be too low to exert force. In this link, the mistake that amateurs easily make is that their hips turn too much, so that their body's center of gravity moves too much on the vertical axis, which causes the power of pulling the ball to be dispersed and can't effectively exert their forward power. It is best to move the center of gravity slightly on the longitudinal axis and a certain amount on the sagittal axis, so that the center of gravity has enough distance to move backward, which is beneficial to move forward when exerting force. If the center of gravity moves, you think it's wrong to throw discus. In the process of moving the center of gravity, the waist and abdomen should be closed and a certain tension should be maintained. The position of the center of gravity on the foot is that the whole sole is slightly in front of the outside, which can give full play to the effect of kicking the ground to the left and front.

Stay one step ahead

While the center of gravity moves, the racket moves diagonally to the right and down after passing through the abdomen. In this action, anything beyond the action is useless. Put the racket in the right position by the most economical route in the shortest time. Be natural. The general position of forehand pull is below the waist on the right side of the body and a little behind the middle of the thigh. Keep proper tension on your shoulders. Failure to fully open the shoulders will affect the momentum transfer when pulling the ball. Relax your arms, and your forearms and upper arms should not be in the same line, that is to say, your arms can't be completely straight, which will easily lead to stiffness. At this time, the included angle of elbow joint is generally between150 ~170.

In the process of putting, for those who learn to pull the loop ball, a fatal problem is to pull the elbow backwards or lift the elbow upwards, which greatly affects the pull. If there is such a problem, we must resolutely get rid of it. During the whole racquet process, the elbow joint is almost always in a straight line with the hand. If it exceeds the position of the hand in the front and back direction, it means that there is something wrong with the racquet. The fore-and-aft sequence is that the forearm drives the elbow joint to move, but the elbow joint cannot pull the forearm to move forward and backward. In the process of leading the racket, the distance between the upper arm and the body should be naturally opened, and the arm should not be pinched, which is about the distance of one punch. exert oneself physically

Generally speaking, the force of pulling the ball is a process of momentum transfer. The basic principle of its transmission is from large muscle group to small muscle group, from the lower part of the body to the upper part, and from the proximal end of the body to the distal end. In the specific operation process, the anterolateral side of the right foot begins to push forward and the center of gravity gradually rises, from the calf, thigh, hip joint, waist, shoulder, elbow, wrist and finger, and finally acts on the moment when the racket hits the ball. In this process, the hip joint should be pushed forward appropriately, the waist and abdomen should be tightened, and the strength should be controlled and concentrated. Forearms and wrists should be retracted at the moment of hitting the ball, and fingers should hold the ball board at the moment of hitting the ball. When pulling the ball with a straight board, we should pay attention to the action of the top plate while grasping the ball board, so as to concentrate the force on the ball board.

5. Shape and hitting position

Modern table tennis pays more attention to the combination of "rubbing", so the shape of pulling the ball does not have to lean forward too much, which will easily lead to excessive friction and insufficient forward force of the ball. The common shape is in the initial stage of pulling the ball. Keep the board perpendicular to the ground. At the moment of hitting the ball, with the wrist adduction, the board leans forward slightly, giving the ball some friction. Friction and impact are simultaneous. When LAC becomes an arc circle, the friction is greater; Pull the forward arc coil, as long as there is an appropriate arc to make the ball cross the net, it is necessary to increase the impact ratio to make the ball generate enough forward momentum; When pulling at the first point, the friction specific gravity can be increased; Pulling back has greater friction, and pulling yourself has greater impact.

Pull-down topspin and general topspin at the hitting position, and the middle part rubs to the middle and upper part after touching the ball; In order to improve the accuracy of pulling the ball, the contact point can be slightly to the left, but never too many sides, which will cause the ball to be pulled sideways.

6. Strike point and strike time

In the past, we often emphasized that the hitting point of the pull ball was in front of the abdomen. Now it seems that there are still some discrepancies in practice, and it is still quite difficult to achieve this. The current hitting point is generally suitable for the side of the body, but it can't exceed the farthest point behind the body and be a little forward. Judging from the current situation, it may be easier to play the acceleration of arm swing when hitting the ball at this time, because the arm of force is the longest at this time and it is easy to exert force.

The hitting time of pre-pull loop ball is in the initial stage of decline, because the high point period is difficult to grasp, the time is too short, and there are certain problems in borrowing power. The hitting time of laga loop ball is decreasing. At this time, there is a long time to rub and make an arc.

Let me talk about the direction of force. Generally speaking, the direction of pulling the ball is forward and upward. But just remember that it is not comprehensive to exert force from right back down to front up. Judging from the projection of the running track of the continuous pictures taken by biomechanics, the moving track of the arm pulling the ball is a semi-arc inclined inward. In fact, it is a process of exerting force from bottom right to top left. This can be seen from the track of elbow joint movement of elite athletes in practice, which is a small semicircle from inside to outside and then inward. So when learning to pull the ball, remember not to move your elbow back and forth, which will affect the quality of pulling the ball in the future.

7. Go with the flow

After the ball leaves the racket, the arm will continue to swing a certain distance. We call this paragraph "going with the flow". Its function is to relieve the inertia of arm strength movement, which has little effect on increasing the strength of the ball, but it is also an essential link, otherwise the movement is not coherent and natural enough, which will affect coordination.

The reset position should be selected according to the hitting situation of the next cricket. If unilateral continuous pulling is adopted, the center of gravity will be tilted to the right during reduction, saving time for the next attack; If you want to attack on both sides, the center of gravity should be biased to the middle and you can move to both sides at any time. Put the racket in the starting position-the first two in the abdomen. Pay attention to the rules when serving:

The serve action only consists of two parts: (1) one-handed throwing action: the throwing height is greater than or equal to 16 cm, and the throwing action should be outside the end line of the table, higher than the table and vertical; ⑵ Swing action of the other hand: According to the new rules, it should be higher than the table, and the line of sight of the referees on both sides and the athletes on the other side should be clear.

3. Pay attention to the pertinence of services:

Know yourself and know yourself, and you will win every battle. Before serving, you should know the basic situation and characteristics of the opponent as much as possible: the basic situation mainly includes whether (1) is a straight shot or a horizontal shot; (2) whether it is left-handed or right-handed; (3) Asian players or European and American players; (4) Whether it is raw rubber or semi-long rubber; 5] is reverse glue or positive glue; [6] Whether it is a near-table fast break or a chop attack; ⑦ Is it the first time to meet or get acquainted? We should be aware of the above situation. If possible, it is best to know the opponent's specialty, serve, hit the ball, drop the ball and the ball path through warm-up, video recording and reporting.

3. Pay attention to serve and score directly:

By studying and studying all kinds of spiral serve, practice the best serve and unique serve, such as side serve, return serve and near-net sideline serve, and score directly at the beginning of serve. In the opening and middle games, we should strive for initiative and open the score, which is particularly important in the "+one point system";

4. Pay attention to serve and attack:

Generally speaking, the purpose of serving to prepare for attack is to improve the service quality through various methods, increase the difficulty of the opponent's catching the ball, and make the opponent's return quality not high, thus creating conditions for the attack.

Specifically, we should pay attention to the following points:

(1) Take advantage of the opponent's loopholes and weaknesses to constantly change the landing point, rotation, strength and curve, thus improving the service quality and creating offensive opportunities;

⑵ By studying the law of serving, we can generally predict the return route of the opponent when serving, thus improving the probability of successful attack.

⑶ Use the power of joint service to mobilize opponents. For example, serving close to the net and turning short, combined with the bottom line, left, right, near, long and urgent ball, can often get twice the result with half the effort;

(4) Serve the ball to the opponent's left line by using the combination of rotation, such as the ball that turns around near the net, the ball that turns down near the net and the "left-fried side spiral ball". This rotation combination makes opponents feel difficult to adapt, thus controlling the rhythm of the game and making the attack score frequently.

5. Pay attention to the power of serving:

When it comes to the power of serving, especially the afterburner, people often think of the consequences of afterburner: either the ball flies out of bounds or the ball bounces too high. But in fact, the service is short, the ball is short, the rotation is low and the position is good; Serving a long ball, the ball is long, urgent, turns and falls on the left and right corners, which embodies the artistry and technicality of table tennis. Not only in practice, but also in theory. As long as the ratio of impact force to friction force is well controlled, the spiral length when the ball rubs on the racket is appropriately increased, the friction thickness is reduced, and the time when the ball rubs on the racket is appropriately extended, the above effects can be achieved.

Pay attention to the rotation of the serve:

The diversity of table tennis rotation and the richness of the curves produced by it are unique in all ball games. So how to carry out various rotations, especially rotations with similar actions but different properties? Mainly should pay attention to the following points:

(1) Use different parts of the racket to hit the ball and rub it, and send out different spinning balls. If you use the lower side of the racket face and the upper side of the racket face to hit the ball and rub it, the ball can rotate and not rotate accordingly;

⑵ Using spiral lead, if the ball is hit and rubbed in different stages and directions, it will produce different rotations. Touching the ball in the direction of the downward spiral will produce the downward spiral; Touching the ball in the upward spiral direction will produce an upward spiral;

⑶ Different wrist force modes produce different rotations: if it is spring strike force, the rotation will not be great; If it is upward spiral linear friction, it will rotate upward;

⑷ Increasing the thickness of sponge properly and enhancing the stickiness of racket can enhance the rotation of table tennis. Especially after using a big ball, this problem is more important;

5. Increase the time and distance that the resultant force acts on the racket: if the spiral ball is served, the ball should be rubbed near the right side of the racket face; For example, when the spiral ball does not turn, the ball should be rubbed near the left side of the racket face;

(6) Properly increase the action, speed up the swing speed and cut it thin: in this way, when the swing speed is far away from the center of the ball, the faster the swing speed, the greater the hitting force and the power of the racket rubbing the ball, so the rotation of the ball is strengthened; Third, the backhand push block. As a unique technology of straight board, the included angle between forearm and upper arm is 90, and the included angle between racket face and forearm is 90. The racket is perpendicular to the desktop, and the upper arm is naturally close to the body.

When the racquet is taken, the abdomen is closed, the arm is retracted, and the racket face is almost attached to the abdomen; When pushing the block, the center of gravity moves forward, and the whole arm sends the racket face forward, keeping the racket face angle (if the incoming ball is topspin, it will be pressed).

Pushing is generally the rising period of hitting the ball, so there must be action before the meeting. The grip of the crossbar backhand stroke is basically the same as the forehand attack. At present, some excellent players have almost no change in grip when switching forehand and backhand. When they hit the backhand ball, they retract their wrists into their arms so that the racket face is facing the incoming ball, and then adjust the radian by turning their wrists when hitting the ball. When most fans hit the ball backhand, there will be a small change in the grip-the thumb and forefinger are pressed down, and the grip will be more stable. Objectively speaking, once the racket rotates in the hand, there will be unstable factors. If the thumb and forefinger are pressed down too hard, then the racket is really comfortable when picking up the ball backhand, because we don't need to adjust the shape of the racket by adduction of the wrist, and the racket face will naturally face the incoming ball. However, we found that when the backhand is changed to the forehand, the racket shape will be too concave, and the two fingers seem to "hold" the racket, so the racket shape must be readjusted when the forehand hits the ball, which is called "changing grip". There is nothing wrong with adjusting the grip when changing the grip between forehand and backhand. You should master the correct method when changing the grip. When picking up the ball backhand, the thumb and forefinger should be slightly pressed down, and the wrist must be retracted into the chest. Through the adjustment of the wrist, the racket face is facing the ball. When correcting the backhand hand, you can use the coordinated force of the tiger's mouth and middle finger to adjust the racket shape. It takes some time to master the change of grip, but I don't recommend this grip. After all, when changing the racket, the force of the fingers will cause the forearm muscles to be tense, which is not conducive to hitting the ball. In addition, the time required for dressing up is likely to delay the fighter. 2. The action points of backhand stroke: the body is about one foot away from the end line of the table, the feet are shoulder-width, the left foot is in front, the right foot is behind, the upper body leans forward, the right shoulder is slightly heavy, the center of gravity is on the right leg, and the body faces the ball. When preparing to hit the ball, the big arm naturally relaxes, the small arm is raised, and naturally lies flat in front of the left abdomen. At this time, the distance between the big arm and the body (armpit) is very small, and the elbow almost points to the ground. The preparation posture before hitting the ball is very important. Many fans are used to the right foot in front, which will lead to the waist twisting to the left when hitting the ball, and the right shoulder and arm will naturally rise, eventually making the arm and body out of touch. There are many fans whose arms are too far away from their bodies. If they raise their big arms to play ball, their muscles will definitely be tense, and the whole arm will shake when hitting the ball, which will affect the stability of hitting the ball. Lead racket: the big arm is stable, the abdomen is adducted, and the forearm is centered on the elbow. When hitting a backhand ball across the board, the waist turns slightly, and when the abdomen is adducted, the waist will naturally turn slightly. The key point of racquet is elbow. Many fans will tighten their elbows to their bodies during racquet, so that their big arms will move back and forth, leading to unstable hitting. Note: When putting the racquet, the body's center of gravity is placed on the right leg, the right shoulder keeps sinking, and the forearm keeps on the left side of the abdomen, always facing the incoming ball. Hit the ball: When the incoming ball just jumps off the platform, the abdomen and forearm are spread out at the same time. At this time, it should be noted that the forearm still rotates clockwise with the elbow as the axis, and exerts force forward and upward. The range of forearm expansion is about 1/4 turns, so it is not necessary to fully expand to the right, the arm remains stable, and the distance between the arm and the body is almost unchanged; Before hitting the ball, the wrist is retracted and the racket is used to catch the ball. When hitting the ball in the late rising stage, the wrist has a small abduction when touching the ball. For beginners, it is only necessary to keep the wrist stable at the beginning of practice. Many fans hit the ball through the back and forth movement of the big arm when picking up the ball in backhand. If the action range of the big arm is too large, it is easy to miss the hitting point, and it is impossible to hit the ball with physical strength, and the stability of hitting the ball cannot be guaranteed. Once you hit the ball for a long time, the muscles of your arm will be too tense and feel numb. Recovery: after hitting the ball, you should quickly lower your body's center of gravity, ensure your body is relaxed, and return to the preparation posture before hitting the ball.