Table tennis racket straight cross-court with reverse downswing should pay attention to those aspects of the problem?

I, forehand flat serve 1. characteristics, performance and role flat serve is a general topspin, general speed serve, it is the most basic beginner's serve, but also to master the basis of other serve. The flat serve will not cause the ball to rotate strongly, so it is easy for the opponent to catch it, and after catching it, it is easy to form a back-and-forth ball by attacking the ball with the forehand or pushing the ball with the backhand, so that the beginners can quickly form the correct "power stereotypes" for attacking the ball and pushing the ball with the backhand. 2. (2) Action (right-handed racket, for example, the same below) (1) before hitting the ball, stand near the stage, chest, stomach, knees, the center of gravity of the body shifted to the palms of the feet. Throw the ball upward with the left hand, and at the same time rotate the right arm inward so that the racket surface is slightly tilted forward, and lead the racket to the right rear of the body. When the ball is thrown to a high point and then begins to fall, the right arm swings from the right back of the body to the right front. (2) When the ball descends from a high point to a point above the net, the upper middle part of the stroke is directed to the left front. The first point of landing after the ball is hit is in the center of the table. (3) After hitting the ball, the arm continues to swing to the left in front of the ball, and quickly returns to a position ready for continuous holding. Note: *The forearm and wrist are the main parts of the force, and the center of gravity of the body is shifted from the right foot to the left foot in the process of the action. *Beginners are prone to not throwing the ball, hitting the ball inside the table, or violating the combined force of the ball. *The first time you learn to serve, you will be able to do it in a standardized and legal way, and then you will be able to learn and practice difficult serves.

Backhand flat serveThe technical movements of the backhand flat serve are completely different from those of the forehand flat serve, from the stance, to the lead, to the body, to the wrist friction, to the method of exertion and to the restoration movement. The main purpose for beginners to learn the backhand flat serve should be to lay a foundation for mastering the high quality backhand serve in the future. (1) Stand in the left corner of the table, right foot slightly in front or flat, body slightly to the left, left hand palm throws the ball in front of the left side of the body. At the same time, the right arm is rotated outward so that the racket angle is slightly forward, leading the racket to the left rear of the body. (2) When the ball drops from the high point to slightly above the net, the right arm swings from the back of the body to the right front, the upper part of the bat is directed to the front, and the first point of the ball is in the center of the table after hitting. (3) After hitting the ball, the arm and wrist continue to swing to the right in front of the body and quickly return to the center of the table. Note * The main part of the force is mainly the forearm and wrist, and the center of gravity of the body is shifted from the left foot to the right foot in the process of the action. * Beginners are prone to not throwing the ball, hitting the ball inside the table, or using the racket to slice the ball forward and downward to produce a sharp downward spiral, which is not conducive to basic training. * From the beginning of the backhand flat serve, should focus on reflecting the upper and lower limbs and waist, hip joints coordinated force. Requirements for technical movements standardized and in line with the rules. If you practice racket or straight racket two-sided attacking method, it is more important to learn and practice backhand serve.

Three, forehand running ball 1. Characteristics, performance and role of the second kind of serve is characterized by fast speed, long landing point, strong impulse, large angle and suddenness. The flight arc of the ball is low and skewed to the left, with a strong right side topspin. Sometimes, according to the tactical needs, when you want to form a hold with the opponent in the middle or far table, this kind of serve is very effective. For children and teenagers who are new to table tennis, because their feet do not move fast and they do not have a wide range of care on both sides of the table, it is more favorable to try this kind of serve. It is also effective against players who specialize in rolling attacks. (1) Before hitting the ball, the left foot is slightly in front of the body, the body is slightly turned to the right, the palm of the left hand is placed in front of the right side of the body, the left hand will be thrown upward, while the right arm is rotated internally, so that the angle of the racket face is slightly tilted forward, the forearm and wrist naturally droop, the elbow joint is higher than the forearm, and the racket is led to the right rear of the body. (2) When the ball drops from the high point to the net height, the right side of the ball is rubbed to the upper right, the thumb presses the racket at the moment of touching the ball, and the wrist is swung to the upper left from the back of the right side. The first point of landing after the ball is hit is close to the end line. (3) After hitting the ball, the arm continues to swing to the left and returns quickly. Note: * The forearm and wrist are the main parts of the arm, and the center of gravity of the body is shifted from the right foot to the left foot during the movement. * When choosing a position, you can stand in the side position to send diagonal and straight line large angle fast long ball, you can also stand in the middle of the table, to the other side of the forehand position or backhand position to send two lines of long balls, the requirements of the two lines of the angle as large as possible, the ball fell to the other side of the table, are required to be introduced from the sideline large angle. Backhand running ball 1. Characteristics, performance and role of the backhand running ball used in training. Especially in the basic training, with the backhand to send a running ball, slightly with a little sharp topspin, stand in the middle, near the table, in favor of playing back and forth. Sometimes according to the tactical needs of the game, in order to hold the opponent, with the main tactical play, occasionally use a backhand sharp ball, purposeful pressure on the opponent's backhand, and then suddenly change forehand. The backhand ball is characterized by fast speed, long landing point, large impulse, flight arc to the opponent's left oblique, with a strong left side of the topspin. (1) Before hitting the ball, stand with the right foot slightly in front or flat, slightly inclined to the left, place the ball in the palm of the left hand in front of the left side of the body, and throw the ball upward with the left hand, while the right arm rotates externally, so that the racket surface is slightly tilted forward. The upper arm is naturally close to the left side, leading the racket to the left rear of the body. (2) When hitting the ball, the right arm is centered on the elbow joint, the forearm is swung to the left, and the waist is rotated from left to right. When the ball drops from the high point to below the net height, hit the upper left center, the forearm accelerates to the right front at the moment of touching the ball, the wrist controls the racket and rubs the ball, and the waist rotates to the right. (3) After hitting the ball, the first point of landing is close to the end line of the table. After hitting the ball, the arm continues to swing to the right and quickly returns to the right. 3. Note: * The forearm and wrist friction is the main part of the power, and the center of gravity is shifted from the left foot to the right foot in the process of the movement. * The biggest difference between the backhand runners and the backhand flat serve is that the backhand runners are fast, with topspin, and the ball has a low arc of rebound and a slightly curved arc of flight after it hits the table.

Fifth, forehand downspin serve 1. Characteristics, performance and function At present, this kind of serve has the highest utilization rate in the domestic and foreign ping-pong world. Many high-level players use very similar techniques to confuse the opponent and send out strong downward spin and non-spinning balls with big contrast in rotation, which causes the opponent to misjudge and score directly or create opportunities for the third board attack. The characteristics of the downspin and spin ball are: slower ball speed, greater choice of the area where the ball will land, and greater variation in spin contrast. When the downward spin serve is used in conjunction with the non-spinning ball, the similarity of the serving technique makes it difficult for the opponent to receive the ball back, resulting in the net, out of bounds or high balls. (1) Before hitting the ball, the downward spin plus spin serve action method: the left foot is slightly in front, the body is slightly leaning forward, the left hand palm rests on the ball placed in front of the right side of the body, and at the same time, the left hand throws up the ball and swings it forward and downward. (2) When the ball drops from the high point to slightly above or flat on the net, the forearm accelerates from curved to extended to the left front bottom, and at the same time, the wrist straightens while gripping the racket, the middle and lower part of the ball rubs towards the bottom, and the ball falls close to the net after hitting the first point of the ball. If the ball is served long, the first point of landing is close to the end line of the table. (3) After hitting the ball, the arm continues to swing to the lower left and returns quickly. Note * The forearm, wrist and fingers are the main parts of the arm. The center of gravity should be shifted from the right foot to the left foot. * The quality of the spin of the downward spin serve depends on whether the friction of the racket on the ball is concentrated, whether the angle of friction is appropriate, and the degree of force exerted by the forearm from curved to extended to the front and downward. * Strengthen the awareness of quality in training, and emphasize the strong spin characteristics of the downward spin serve. The forehand serve without spin 1. Characteristics, performance and function The forehand serve without spin is often used in conjunction with the forehand serve with downward spin to achieve better results. The forehand serve without spin is roughly the same as the downward spin serve in appearance, which is easy to cause the opponent to misjudge the ball and directly lose points or have a ball of opportunity, thus forming an indirect serve. 2. (1) Before hitting the ball, from the standing position, the preparation posture to the ball throwing, the racket leading and the swinging action should be exactly the same as the forehand downswing serve. (2) The difference between a no-rotation serve and a plus-rotation serve is that the arm external rotation is small, reducing the angle of the racket face, hitting the middle or lower part of the ball, reducing the downward friction force, and making the point of action close to the center of the ball, thus forming a no-rotation serve. (3) The racket face should be adjusted as soon as possible after hitting the ball to approximate the action of sending a downward spin plus spinning ball, in order to achieve the purpose of confusing the opponent. 3. Notes * In the match, the use of this type of serve should be adjusted flexibly in the landing point according to the opponent's playing style and technical characteristics. * The realism shown in the fake action of serving the unreturned ball should be strong, and try to make it as real as possible, so as to be threatening.

Seven, backhand downward spin 1. Characteristics, performance and function When backhand downward spin is added, it is often accompanied by backhand unreturned serve. Straight and horizontal racket two-sided attack method players mostly use this kind of serve. The use of straight and diagonal lines in the landing point, and the clever combination of long and short balls are conducive to the two-sided attack of the third board. (1) Before hitting the ball, stand with the right foot slightly behind or flat, slightly inclined to the left, and place the ball on the left side of the body with the palm of the left hand. When leading the racket, the left hand throws the ball upward, while the right arm rotates internally. Grip the racket straight with the wrist curved, and grip the racket horizontally with the wrist adducted, so that the racket face is tilted back, and the racket is led to the left rear of the body. When meeting the ball, the right arm swings from the upper left rear of the body to the upper right front. (2) When the ball drops from a high point to a point slightly above or level with the net, the forearm is pushed downward to the left front, while the straight grip wrist is extended and the transverse grip wrist is retracted, so that the middle and lower part of the racket rubs against the bottom of the racket. The first point of landing after the ball is hit is close to the net. (3) After hitting the ball, the arm continues to swing to the right front and bottom, and quickly returns to the ground. Note: * The wrist and forearm are the main parts of the body, and the center of gravity is shifted from the left foot to the right foot during the movement. * The backhand serve is limited by the body, so it should be coordinated with the abdomen and waist. * In the moment the racket touches the ball, increase the wrist and finger force is the key to improve the quality of the serve.

VIII. Backhand unchipped serve 1. Characteristics, performance and function In the game, backhand unchipped serve is often used in conjunction with backhand spin. The appearance of the backhand serve and the backhand serve with spin is more or less the same, and it is easy for the opponent to make a mistake in judgment and directly lose points or create opportunities for the third board. The main difference between the backhand unspinning serve and the backhand plus spin serve is that the arm internal rotation is small, the angle of the racket face is reduced, the middle or lower part of the ball is hit to reduce the friction downward, and the ball is pushed forward slightly so that the force is close to the center of the ball, thus forming the unspinning ball. Note: * The forehand short balls are mostly non-spinners, and the backhand long balls are mostly spinners. * In the long and short ball landing point, strive to make the short is short, long is long, do not send half-length, rotation contrast is not big ball.

Nine, forehand serve left side up (down) spin 1. Characteristics, performance and function forehand serve left side up (down) spin, is the player in the game in the use of more serve. This kind of serve is mainly based on the change of rotation, the arc of flight to the left side of the opponent, the opponent's return to their left side of the upper (lower) rebound. The use of similar techniques to send two different rotating ball, can play a role in confusing the role of the opponent. (1) Before hitting the ball, stand on the left half of the table. Place the ball in the palm of the left hand in front of the right side of the body. When leading the racket, the left hand throws the ball upward, and at the same time the right arm is rotated outward, the wrist is curved when holding the racket straightly, and the wrist is spread out when holding the racket horizontally, so that the racket surface direction is slightly biased to the left, leading the racket to the upper right, and the waist is slightly turned to the right, and when welcoming the ball, the right arm swings down from the upper right to the sitting party. (2) When the ball drops from the high point to near the net height, the forearm accelerates to swing, the wrist of the straight gripper curves, the wrist of the horizontal gripper closes in, and the waist cooperates with the left pass. The middle of the ball is rubbed to the upper left side for left topspin, and the middle of the ball is rubbed to the lower left side for left bottomspin. Adjust the distance of the first drop of the ball according to the length of the serve. (3) After hitting the ball, swing your arm to the left and return it quickly. Note * The left side downward spin serve is the same as the left side topspin serve, but the difference is: the racket is led backward and upward, the arm is swung to the lower left, the middle and lower part of the ball is rubbed to the lower left, and the height of the ball touches the net slightly higher than the height of the net. * When holding the racket horizontally, it is better to loosen the three fingers of the grip to increase the flexibility of the wrist. * In the match, you can use the forehand left side topspin with the forehand left side bottomspin, so that you can use similar techniques to serve the side topspin and bottomspin balls with a greater contrast in rotation, and create opportunities for the third board. * If the opponent is a chipping player or a conservative serve-receiver, you can use the side topspin to take the initiative. * The forearm and wrist are the main parts of the serve, and the waist is auxiliary. The center of gravity is shifted from the right foot to the left foot during the movement.

Ten. Backhand send right side up (down) spin ball 1. Characteristics, performance and role of backhand send right side up (down) spin ball to spin changes, the flight arc to the left, the opponent back to the right side of the ball up (down) rebound. Due to the use of similar techniques to send two different rotations of the ball, so it can play a role in confusing the opponent. (1) Before hitting the ball, stand on the left half of the platform, stand with the right foot slightly in front or flat, slightly inclined to the left, and place the ball on the left side of the body with the palm of the left hand. When leading the racket, the left hand throws the ball upward, and at the same time, the right side is slightly rotated inward, so that the racket surface is almost vertical, leading the racket to the left rear, and the waist is slightly rotated to the left. When meeting the ball, the right arm swings from the left rear to the upper right. (2) When the ball drops from a high point to near the net, the forearm accelerates and swings to the upper right. Grip the racket straight with the wrist extended, grip the racket horizontally with the wrist tucked in, and rotate the waist to the right. If you rub the center of the ball to the upper right, you will hit a right side topspin, and if you rub the center of the ball to the lower right, you will hit a right side bottomspin. Adjust the distance of the first drop of the ball according to the drop of the ball. (3) After hitting the ball, swing your arm to the upper right and return it quickly. Note * The right side downward spin serve is the same as the right side topspin serve, but the difference is that the racket is led to the upper left, the right arm is swung to the lower right, the lower part of the middle of the ball is rubbed to the lower right, and the height of the ball is slightly higher than that of the net. * The cross-court side of the backhand top (down) spin ball to increase the upper arm to the right side of the swing amplitude.

XI, backhand sharp downspin 1. Characteristics, performance and role of the backhand sharp downspin is characterized by: the ball speed is faster and with spin, the opponent pushes and dials back to the net is easy to cause errors, and easy to use the ball back to the ball of opportunity. After the ball is sent out, the arc of flight is low and long. 2. (1) Before hitting the ball, stand on the left half of the table, stand almost flat on both feet, face the table, and place the ball in front of the body with the palm of the left hand. When leading the racket, the left hand throws the ball upward, while the right arm slightly rotates to make the racket face slightly backward, leading the racket to the front of the abdomen. When meeting the ball, the right arm is swung forward and upward from the back of the body. (2) When the ball drops from the high point to slightly below the net height, the forearm accelerates and pushes the ball forward and downward, and the wrist extends slightly to hit the middle and lower part of the ball. (3) After hitting the ball, the first point of impact is close to the end line. The arm is swung forward and downward with the momentum and is quickly restored. This type of serve can only be used for supporting and holding. * The forearms and wrists are the main parts of the body, and the center of gravity is in the feet. (a) Forehand high throw serve (1) Forehand high throw left side topspin 1. Characteristics, Performance and Function The high throw serve is a kind of legal combined serve. In addition to the characteristics of the low throw serve, the high throw ball has the characteristics of the low throw serve, due to the ball is thrown 2-3 meters high when the ball is falling, by the influence of its descending speed, so that the ball increases the vertical descending gravity. At the same time, when the ball is rubbed from right to left with the racket, a left and right lateral force is generated. "The two forces are combined to increase the speed and rotation of the ball. (1) stand left half of the table when serving, left hand palm ball placed in front of the right side of the body, lead the racket, the left hand up the ball upward vertically thrown up high, while the right arm external rotation, straight hold the racket wrist extension, horizontal hold the racket wrist extensions, so that the ball direction slightly to the left, to the upper right lead the racket, the waist slightly to the right turn. When meeting the ball, the right arm swings from the upper right to the lower left. (2) When the ball descends from the high point to the height of the net when hitting the ball, the forearm accelerates and swings to the upper left, the waist cooperates and turns to the lower left, the forearm and wrist control the racket, and the middle of the stroke rubs hard to the upper left. (3) After hitting the ball, the arm continues to swing to the lower left with the momentum and is quickly restored. Note: * Adjust the distance of the first point of the ball according to the length of the serve. * The forearm, wrist and fingers are the main parts of the force, and the waist is auxiliary. * After the ball is thrown upwards, it is difficult for scholars to grasp the exact time of hitting the ball due to the gradual acceleration of the falling speed of the ball, and it is easy to miss the ball. This can be avoided after practice and skill.

(2) Forehand high left downspin 1. Characteristics, Performance and Function In the game, the forehand high left downspin can be used in conjunction with the forehand high left topspin to send out the side up and downspin balls with a large contrast in rotation by using a similar technique, so as to create an opportunity for attacking on the third board. 2. The movement is the same as the forehand high spin shot, but the difference is that the racket is led backward and upward, the arm is swung to the lower left, and the middle and lower parts of the ball are rubbed to the lower left. When serving left side topspin, it is better to relax the three fingers holding the racket handle in order to increase the flexibility of the wrist. * Increased friction toward the bottom of the ball is the key to improving the quality of spin when serving a power friction ball.

Thirteen: Squat serve (1) Squat serve with right side topspin 1. Characteristics, Performance and Function The squat serve is based on the change of spin, and is mostly used by cross-court players. Because the part and direction of the friction ball is different from that of the underhand serve, the direction of rebound of the spinning ball is also different from that of the underhand serve when it falls to the opponent. The squat serve is less commonly used in today's table tennis matches, and because of this, its occasional use in matches is often unfamiliar, sudden, and unsettling to the opponent. If the squat serve is used according to the opponent's playing style and technical characteristics, sometimes it will have an unexpected effect at the critical moment. (1) Before hitting the ball, stand with your left foot slightly in front of you or with both feet parallel to each other, tilt your body to the right, and place the ball in the palm of your left hand in front of the right side of your body. When leading the racket, the left hand throws the ball upward, and at the same time makes a squatting posture, the right arm is raised higher than the shoulder, the wrist is outwardly extended, and the direction of the racket surface is slightly inclined to the left. When meeting the ball, the right arm swings from the left to the right front. (2) When the ball drops from a high point to the net or slightly above the net, the forearm accelerates and swings from the left to the right in front of the ball, and the wrist is turned inward and rubbed against the upper right side at the same time. (3) After hitting the ball, the arm and wrist continue to swing forward and upward with the momentum, and quickly return to prepare for the next stroke. The forearm and wrist are the main parts of the power, and the center of gravity of the body is between the two feet during the movement.

(2) Downward squatting right side downspin 1. Characteristics, Performance and Function In the game, the downward squatting right side downspin is often used in conjunction with the downward squatting right side topspin. In the match, it is often used in conjunction with the underhand right side downspin. In a similar way, it is used to send out the side top and side downspin balls with a large contrast in rotation to confuse the opponent, and to create the conditions for the third board to attack. From the preparation posture before hitting the ball to the restoration posture after hitting the ball, the method of squatting forehand right side downspin is roughly the same as squatting forehand right side topspin. The difference is that when the ball descends from a high point above the net, the racket should be higher than the ball, the ball should be hit in the upper center and rubbed down to the right side, and the forearm should be swung from the left to the lower right side. (1) The squat serve is prone to foul play such as hitting the ball on the rise and throwing the ball to the back side at too great an angle. (2) In order to increase the power of the squat serve, change the racket surface and maneuver suddenly when the racket touches the ball. Both forehand and backhand should be able to serve balls with different spins and drop points. (b) Crouching backhand left side topspin 1. Characteristics, performance and function In the game, the crouching backhand left side topspin can be used in conjunction with the crouching backhand left side bottomspin. This kind of serve is more effective for the players who are conservative in serving method and focus on rubbing and receiving. The movement of squatting backhand left side topspin is more or less the same as squatting backhand left side bottomspin. The difference is that the center of the ball is rubbed to the top of the left side, and the forearm and wrist are swung from the right to the top of the left side. When you squat to serve a backhand left side topspin, the opponent will receive the ball faster and the angle may be very big. Therefore, it is required to stomp the ground to restore the speed quickly in order to receive the ball off the board. * With this technique, the angle of the racket shape is fully exposed and it is not difficult for the opponent to judge the spin. From the point of view of tactics and playing style, it can be used as a complementary serve or as an unconventional serve at critical moments. Backhand squatting serve (a) Backhand squatting serve with left side spin 1. Characteristics, performance and function In the game, squatting backhand serve can be used in conjunction with squatting forehand serve, the two kinds of serves are identical in the preparatory posture before hitting the ball, the introduction of the racket and the throwing action, only in the hitting process, a sudden change in the angle of the racket and the direction of the force, which will send out a variety of different rotations, speeds and points of impact of the ball. The backhand squatting serve falls to the opponent's table after the rebound arc to the left side of the inflection, is conducive to restricting the opponent's side of the attack. (1) Before hitting the ball, stand with both feet parallel to each other and face the table squarely. When leading the racket, the left hand throws the ball upward, and at the same time makes a squatting posture, and the upper arm leads the racket to the lower right with the wrist inward. When meeting the ball, the right arm swings from the lower right to the upper left. (2) When the ball drops from a high point to a point parallel to the net or slightly above the net, the forearm accelerates and swings from the upper right to the lower left, the wrist extends at the same time, and the center of the ball is rubbed to the lower left side. The first point of landing after the ball is hit should be reasonably adjusted according to the length of the serve. (3) After hitting the ball, the arm continues to swing to the left front and top with the momentum, and quickly stirs up to prepare for the next stroke. (1) In the choice of drop point, it is preferable to serve short balls from the opponent's forehand and long balls from the opponent's backhand. (2) The squat serve is more difficult to control the landing point of short balls.