1. Standard dimensions of table tennis tables
Generally speaking, the dimensions of table tennis tables are: length: 2740 mm (2.74M); width: 1525 mm (1.525M); Height: 760mm (0.76M); Net height: 1525mm (1.525M).
The net height here refers to the distance between the net and the ground. The distance between the table and the ground is 0.76 meters, the net length is 1.83 meters, and the net height is 0.1525 meters.
Table tennis net device
(1) The net device includes a net, a hanging rope, a net post and a clamp part that fixes them on the table.
(2) The net should be hung on a rope, with both ends of the rope tied to upright net posts 15.25 cm high. The distance between the outer edge of the net post and the outer edge of the sideline is 15.25 cm.
(3) The top of the entire net is 15.25 cm away from the playing surface.
(4) The bottom edge of the entire net should be as close to the playing surface as possible, and its two ends should be as close to the net posts as possible.
(5) Paint 0.02-meter-wide white lines on the four sides of the table, and there should be a 0.003-meter-wide center line in the middle of the table parallel to the long side of the table.
2. The price of table tennis tables
Because table tennis is my country’s national sport and is also very popular among the public, the table tennis market is also huge, and the domestic table tennis table tennis table is relatively large. There are many brands of table tennis tables, including Double Happiness, 729, Pisces, etc. These brands have cheap and simple folding table tennis tables, which are about 1,000 yuan to 1,500 yuan. They are suitable for amateurs to buy, and they are slightly more professional. The price is about 1,500 yuan to 3,000 yuan, and there are also higher-end ones.
Of course, there are many excellent table tennis table brands abroad, and some friends also like these brands. The well-known brands such as Doronic, Butterfly, and Yula are world-renowned professional brands and are well-known in the industry. It has an excellent reputation and guaranteed quality, but the price is also more expensive, probably between 8,000 yuan and 20,000 yuan. Of course, the price of a table tennis table is closely related to its style and color. Green ones are generally more expensive.
Practical skills in table tennis competition
1. It is better to loosen the racket when serving
Many table tennis veterans will make their racket looser when serving. Why is this? How to loosen it? The plane of the rotation direction of the wrist is perpendicular to the straight line of the arm. After hitting the ball, you should turn your body slightly to relax and return to the standard preparation action. In order to shake your body, your heels should be raised at the moment of impact. You must have four consciousnesses when playing basketball: keep an eye on the ball to judge the incoming ball, move your feet, hit the ball, and recover.
2. Squat with two legs while turning the ball
When squatting, first step sideways to get out of the way of the ball, and then squat with both legs, instead of 1 leg arch, 1 Leg kicking is to move your body slightly to one side, relax your right shoulder and sink, and kick your right leg quickly! When the center of gravity shifts from the right foot to the left foot, don't push the right foot to make the body jump up. You should feel that the center of gravity is moving parallel.
The racket should be guided along the ball's descending trajectory. When the ball drops to the appropriate position, pull it upward again, so that it is not easy to miss. Essentials of the backspin arc-turning action: Adjust the position sideways. Squat with both legs. Relax your arms. Push upward. Cover to the ears. In the early stage of pulling the ball down, you must first adjust your footwork and hitting position, and straighten your racquet arm.
3. Standard Specifications for Serving Actions
Up-throwing action with one hand: The height of the up-throwing action should be greater than or equal to 16cm. The up-throwing action should be outside the end line of the table, higher than the table and vertical. Throw up. The swing movement of the other hand: If according to the new rules, it must be higher than the table, and the movement must be clearly visible to the referee and the opponent player in the center on both sides.
4. The Quarter Law
When you start practicing forehand attacks, you must remember 1/4. First, the trajectory of the arm swing is 1/4 circle, and the racket The friction ball is also 1/4 of the ball, and the arm swing is relaxed to the starting position according to the original 1/4 arc - Coach Lu used the end line as the diameter on the ball table, and the intersection of the center line and the end line as the center of the circle to draw an arc. , the arc on the right half is the downward projection of the arm swing. Then face the wall, use your own height to prepare for the attack, draw a horizontal line with waist height, eyebrow height as the highest point, draw an arc, this is the projection of the front.
To attack the ball with the forehand, press the racket with the thumb of your right hand, relax the index finger, and lift the racket with the middle finger. During the process of drawing a 1/4 arc, the thumb and middle finger have a 1/4 arc fine-tuning movement. The upper 1/4 arc of the ball. At the same time, the forearm should also rotate 1/4 arc.
5. The harder you hit the racket, the more you press down.
A little more force. When attacking the ball, your wrist should be slightly curved, so that the ball speed will be faster.
6. Learn more about the polishing ratio
When you are not rushing, you will think that hitting the ball forward more can make up for the speed. This is a bit of a poison to quench your thirst. In fact, hitting the ball too much can easily cause The arc is not good and there are many mistakes. And because the spin is not strong, the forward movement of the pulled ball is not strong, especially outside the near table. Too much friction will result in full ball speed and low power.
Standard weight of table tennis balls
Standard weight of table tennis balls:
According to the quality index of table tennis balls, the ITTF divides the balls into three levels, using stars. levels to adapt to different occasions. Among them, the highest level is 3 stars. Specifically:
Three balls: weight between 2.64 and 2.53g, roundness error less than 0.15mm, hardness value less than 0.80mm, designated ball for ITTF professional competitions.
Er Planet: The weight is between 2.40 and 2.53g, the roundness error is less than 0.25mm, and the hardness value is less than 0.90mm. It is suitable for major domestic competitions and professional training of the national team.
One planet: The weight is between 2.35 and 2.63g, the roundness error is less than 0.25mm, and the hardness value is as small as 1.10mm. It is suitable for amateur competitions or fitness in table tennis rooms, schools, troops, units, etc.
How to change the weight of a table tennis racket:
Change the thickness of the base plate or the size of the board to adjust the weight of the racket: If you want to reduce the weight of the racket, you can also reduce the racket surface appropriately. Traditional horizontal racket boards are relatively large. Shortening the board length of the racket base to about 155mm and reducing the board width to about 150mm can reduce the weight of the horizontal racket. If the weight of the pen-hold racket is relatively light, you can consider adding a layer of wood on the back of the blade to increase the thickness of the blade to increase the weight of the racket. For process reasons, it is difficult to thin the base plate thickness or increase the board surface. Of course, changing the size of the racket surface and the thickness of the sole plate must be prepared to pay the price of changing the batting performance of the racket. Reducing the racket surface will make the racket feel harder when hitting the ball, and increasing the thickness of the sole plate will increase the elasticity of the racket.
Adjust the weight of the rubber sponge: As far as reverse-stick rubber is concerned, I once measured the weight of the rubber of a domestic famous brand and found that there were more than a dozen rubber sponges of the same model, same thickness, and same sponge hardness. , there is an error of about 5g in weight between them, so the overall weight of the racket can be adjusted by selecting the weight of the rubber sponge.
Adjust the center of gravity of the racket: The normal center of gravity of the racket is conducive to improving a good hitting feeling. As far as the base plate is concerned, the normal weight balance point of the base plate should be between 43-50 of the total length of the base plate. The measurement method is: place the base plate flat on the edge of a vertical ruler, and keep the handle of the base plate at a 90-degree angle to the ruler.
Move the position of the base plate forward and backward on the edge of the ruler to find the weight balance point of the base plate. When the balance point is found, measure the length from this point to the top of the board head, and then divide the length obtained by the side by the total length of the base plate to calculate If the percentage is between 43-50, it belongs to the normal center of gravity range.
Generally, the center of gravity balance point of traditional pen-hold shooting with sponge rubber on one side is between 43 and 46; while the center of gravity balance point of horizontal shooting or pen-hold shooting with sponge rubber on both sides is mostly between 46-50 . If the balance point of your blade's center of gravity is lower than the above-mentioned 43 or 46, the user will feel that the racket head is too heavy. If the center of gravity balance point of the blade is higher than the above-mentioned 46 or 50, the user will feel that the racket head is too light. For rackets with an overweight head, you can choose lighter weight sponge rubber, or adjust the racket by lengthening or weighting the handle. Some people also add two thumbtacks on the top of the racket handle to adjust the center of the racket. For rackets with too light a head, you can choose a heavier sponge rubber or use a "metal guard edge" to adjust the center of gravity.
You can adjust the weight of the racket yourself, or you can entrust it to a professional department. Some table tennis equipment stores have begun to provide such services. For example, Beijing Caihe Sports Development Service Center-Shiaode Store provides racket modification services.
Of course, if the weight of the racket is too heavy or too light, and the performance of the racket is not very good, our suggestion is to choose a more suitable racket, otherwise it will be time-consuming, laborious and expensive. If you can't achieve satisfactory results, wouldn't it be disappointing?
Standard table tennis venue
Table tennis venue: The competition area space should be a rectangle of no less than 14 meters long and 7 meters wide, with a height of 5 meters, and the four corners should not exceed Enclosed by a 1.5 meter baffle.
In addition, the upper surface of the table is called the playing surface, which is 2. 74 meters long, 1.525 meters wide, and 0. 76 meters high from the ground, see Figure 1-1-1. There is a 2cm wide white edge line along each 2.74m table edge and a 2cm wide white end line along each 1.525m table edge. The table is divided into two equal "half areas" by a 3 mm wide white center line. The center line is parallel to the side lines and shall be considered part of the right half.
Introduction to table tennis
Table tennis originated in Britain. At the end of the 19th century, tennis was popular in Europe. However, due to restrictions on venues and weather, some British college students moved tennis indoors, using the dining table as a table, books as nets, parchment as rackets, and playing on the dining table. . In 1890, several British naval officers stationed in India accidentally discovered that playing tennis on a small table was quite exciting. Later, they switched to solid rubber instead of a solid ball with little elasticity, then to a hollow plastic ball, and used a wooden board instead of a tennis racket to play this novel "tennis game" on the table. This is where the name Table Tennis comes from. .
Soon after table tennis appeared, it became a popular sport. At the beginning of the 20th century, the United States began to produce complete sets of table tennis equipment. It is the number one racket-holding sport in the United States, with more than 200,000 Americans playing table tennis. Initially, Table tennis had other names, such as Indoor tennis. Later, an American manufacturer created the new word Ping-pang based on the sound made by the impact of the table tennis ball, which was used as a patented registered trademark for the "table tennis" he manufactured. Ping-pang later became another official name of Table Tennis. When it spread to China, people created the new word "Table Tennis".
Many words used in table tennis are derived from tennis. The ball used to play table tennis is called Ping-pong ball or Table-tennis ball, the table tennis table is called Ping-pong table, the table is called Court, the net in the middle is called Net, the frame supporting the net is called Net support, and the table tennis racket is called Ping-pong. pong bat.
11 points), the so-called "game" is Set in English, and the serve is called Serve.
Among the many table tennis competitions, the most prestigious is the World Table Tennis Championships, which was held annually at first and then held every two years after 1957.
Table tennis standard serve
Forehand running ball
1. Characteristics: The ball is fast, has a long landing point, and has high momentum. It is served to the opponent's right corner or The center-left position poses a greater threat to the opponent
2. Key points:
① The ball should not be thrown too high;
② Increase the swing speed at the moment of hitting the ball ;
③The first landing point should be close to the end line of the table;
④The point is at the same height as the net or slightly lower than the net.
Short serve
1. Characteristics: Small hitting movement, quick release, the second jump after the ball lands on the opponent's table does not come out, making it difficult for the opponent to use force to grab the ball. , rush or attack.
2. Key points:
① Throwing the ball should not be too high;
② When hitting the ball, the strength of the wrist is greater than the strength of the forearm;
③The first landing point of the serve is on the table, not too close to the net;
④The action of serving is as similar as that of a long ball, making it difficult for the opponent to judge.
Forehand serve with left up (down) spin
1. Characteristics: The left up (down) spin force is strong, and when the opponent blocks the ball, he will turn to the right (up) The ball rebounds from the bottom), usually standing to the left of the center line or serving sideways.
2. Key points:
① Keep your abdomen closed when serving, and the hitting point should not be far away from your body;
② Try to increase the amplitude of the swing from right to left and arc to enhance side spin strength.
③When serving left-side topspin, the wrist quickly retracts at the moment of hitting the ball, and the racket rubs from the center of the ball to the upper left. ④When sending left backspin, the racket face is tilted back and the racket rubs from the middle and lower part of the ball to the lower left.
Backhand serves up (down) spin on the right side
1. Characteristics: The up (down) spin on the right side is strong. After the opponent blocks it, it will spin up (down) to the left ) rebound. The best place to serve is to use a long diagonal ball from the left and a short ball from the center right near the net.
2. Key points:
① Pay attention to abdominal tightening and waist turning movements;
② Make full use of wrist rotation and forearm force exertion;
③ When serving a right-side spin ball, the racket rubs from the middle of the ball to the upper right at the moment of hitting the ball, and there is an upward hook movement on the wrist;
④ When serving a right-side spin ball, the racket face is raised later , the racket rubs from the middle and lower part of the ball to the right and downwards at the moment of hitting the ball.
Backhand rush ball and rush backspin
1. Characteristics: fast ball speed, low arc, large forward motion, forcing the opponent to retreat to catch the ball, which is conducive to attacking, often with Used in conjunction with aggressive backspin balls.
2. Key points:
① The hitting point should be on the left front side of the body at the same height as the net or slightly lower than the net;
② Pay attention to wrist shaking. force;
③The first landing point is near the end line of our own table area.
Forehand serving and non-spinning serve
1. Characteristics: The ball speed is slow and the forward momentum is small. Similar serving movements are mainly used to create rotation changes to confuse the opponent and cause the opponent to catch the ball. Serve incorrectly or create opportunities for yourself to attack.
2. Key points:
① Throwing the ball should not be too high;
② When turning the ball, the racket surface is suppressed later and cuts the middle and lower part of the ball; When the ball is spinning, you should pay more attention to the forward movement of the arm;
③When the ball is not spinning, the angle of tilt of the racket surface will be reduced immediately after hitting the ball to increase the force of pushing forward.
Forehand high throw serve
1. Features: The most significant feature is that the throw is high, which increases the positive pressure on the racket when the ball drops. The serve is fast and has great momentum. , there are many rotation changes, and it turns and flies after landing on the stage. However, the high throw service action is complicated and has a certain degree of difficulty.
2. Key points:
① Don’t throw the ball too far away from the table and your body.
②The hitting point should be at the same height as the net or slightly lower than the net, preferably on the middle right near the waist (15cm).
③ Try to increase the amplitude and arc of the inward swing.
④Serving the left side topspin and backspin is the same as the low toss serve. ⑤After touching the ball, add a recovery action to the right and forward, which can increase the opponent's judgment (combined with a right spin ball, it will be more powerful).
Squat serve
1. Features: Squat serve is an overhand serve, and Chinese athletes began to use it as early as the 1950s. It is easier for players with a horizontal shot to squat down than players with a straight shot. Players with a straight shot need to change their grip when serving, that is, move their index finger to the back of the racket. Squatting down to serve can produce left and right spins. When the opponent is not used to it, it is a great threat. If you serve high quality balls at critical times, you can often score directly.
2. Key points:
① Pay attention to the coordination of throwing the ball and swinging the bat, and master the hitting time.
② The serve must be of high quality and the serving action must be neat to prevent the opponent from attacking you before you fully stand up
③ Squat down and serve with top and back spin on the right side At this time, the left foot is slightly forward, the body is slightly turned to the right, and the swing path is from the left back to the right front. When the middle part of the ball is touched and rubbed upwards to the right, it is right-side topspin; when the middle part of the ball is rubbed downwards to the right, it is right-side backspin.
④When squatting down to hit the left side top and backspin, stand slightly flat from the middle right to the upper left, with your body basically facing the table, and the swing route is from the back right to the front left. The friction when the ball hits the ball is left-side topspin; the friction from the middle to the lower left part of the ball is left-side backspin.
⑤When serving up and downspin on the left (right) side, special attention should be paid to quickly making semicircular friction movements with the ball.