Basic knowledge of choosing badminton rackets
There are many brands of badminton rackets on the market now, but in any case, you must choose a racket that suits you. First of all, you must consider the following aspects when purchasing badminton rackets:
1, the weight of the badminton racket should be appropriate: in fact, the lighter the racket, the better. Although the racket is light and the swing speed is fast, it will feel useless when spiking, which will affect the hitting power.
2. Check the overall structure of the racket: after you get the racket, wave it below to see if it shakes your hand. The brand of the rocker must be that the racket shaft (the joint between the racket handle and the racket head is now made of carbon alloy steel) is too hard; Do not shake hands, indicating that the racket shaft is more elastic. You can also hold the handle with one hand and break it with the top of the racket head with the other hand. The racket is slightly bent, which proves that the racket shaft is more elastic.
3. You can choose a badminton racket that suits you according to your actual situation. For example, in singles, it is suitable to choose an extended racket. For offensive players, you should choose a slightly heavier racket with medium hardness. In doubles, it is best to choose a standard length racket. If you are a defensive player, you should choose a lighter racket.
4. Choose the handle according to the size of each person's hand, and the handle should be comfortable. People with big hands will feel uncomfortable holding thin or square handles.
5. See if the strings are symmetrical. Each square composed of crossed strings should be the same size, and the tightness of each string should be consistent.
6. When you get a badminton racket, you should first look at the shape of its racket head. Generally speaking, it can be divided into two types: the traditional egg-shaped racket frame and the square-headed flat-headed racket frame. The shape of the badminton racket determines the size of its sweet zone (the best hitting zone on the racket face), because when the ball falls in the sweet zone, it can give the player enough hitting power and control the ball, so the size of the sweet zone is very important for the player, which can make it easier for the player to hit a high-quality ball.
7. Badminton rackets can be divided into carbon fiber, carbon-aluminum integration, aluminum-iron integration and aluminum-iron separation according to different materials. The choice of material is directly related to the weight and price of the racket. Generally speaking, all-carbon badminton rackets have the lightest weight and are the mainstream materials at present.
Advanced knowledge of purchasing badminton rackets
Beat shape and sweet area
Beat shape: It is the geometric shape of the racket head. Now there are generally three kinds: A: traditional oval B: square-headed ISO racket C: larger chord surface and larger ISO shape.
Sweet zone: It is the best hitting zone on the racket face. When the hitting point is in the sweet zone, it can give you enough hitting power, control the ball, and make you feel very comfortable. The size of the sweet zone is very important for players, which can make it easier for players to play high-quality balls, and the most critical factor to determine the size of the sweet zone is the shape of the frame.
It can be seen that the design of ISO makes the sweet area of the racket larger than that of the traditional racket. Of course, the bigger the racket head, the better. The increase of the racket head will have a negative impact on the torque and weight. ISO head shapes are divided into two types. One is the square-headed eight-line hole, commonly known as [square-headed] such as YONEX Ti-5 and VICTOR LEADER, and the other is the six-line hole, commonly known as [square-headed], whose racket frame is slightly larger, such as YONEX Ti-6 and Ti-8. They are different in appearance, but there is no difference in performance. You will clearly understand the advantages of ISO racket head in defense, especially in catching and killing the ball. This is also the reason why more and more players use ISO rackets. It should be said that ISO racket is the development direction of badminton racket. You buy a racket now. My suggestion is to try to buy ISO head products.
The relationship between hardness, torque and ball control
Hardness: The ball only stays on the racket for four thousandths to six seconds when hitting the ball. During the swing before hitting the ball and when the racket hits the ball, the racket shaft has a process of bending and recovery, and the ball has flown out of the racket face before the racket returns to its original position. Under the condition that players have the same strength, the softer the bat is, the easier it is to bend in the swing process before hitting the ball, and the greater the bending amplitude is, thus driving the bat head to move at a greater angular velocity and generating greater hitting power. The harder the racket handle is, the less force is transmitted to the ball when hitting the ball, but the transmission of hitting vibration can be reduced. For the racquet frame, the greater the hardness of the racquet frame, the less likely it is to be deformed and twisted when touching the ball. The more power can be transmitted to the badminton, the less vibration will be transmitted.
Torsion: The so-called torsion refers to the degree to which the racket face is twisted when hitting the ball. The smaller the torque, the better the ball control.
The relationship between hardness and ball control;
1. Directional controllability: When the racket hits the ball, the ball can return according to the hitting direction or angle. The harder the racket shaft and the racket frame are, the higher the stability of direction control. When the ball doesn't hit the sweet area of the racket face, the harder the racket is and the smaller the torque is.
2. Depth control: This refers to the control of the return flight distance (landing point). The control of depth is related to the player's own strength. The softer the racket, the better the depth control. Regular badminton rackets have a certain description of racket shaft hardness. For example, VICTOR will mark the racket handle with flex- 18 or 17, and the racket handle with 18 is softer. If it is not marked, it is generally 17. YONEX marked half of the racket handle in the product manual, but did not mark it on the racket body. The way is 5 points, the higher the score, the harder the racket handle. If it is not marked, you can also make a rough estimate from the materials. The material of high-strength carbon fiber is harder than carbon fiber (graphite/carbon). When choosing a badminton racket, you can also bend the racket shaft by hand to try the hardness. Pay attention to the bending point of the racket shaft, and the closer it is to the handle, the better. You can also try to twist the racket by holding the handle and the head of the racket frame and rotating it in the opposite direction (like twisting a towel). Note that you must try to understand it.
Generally speaking, the racket shaft of the current badminton racket tends to be soft and the racket frame tends to be hard. The racket shaft hardness of the badminton racket produced by YONEX is much softer than that of a few years ago. I think softer rackets are more suitable for amateurs.
Weight, balance point and length
Each racket should be marked with a weight, generally u, 2U, 3U. Some manufacturers also use their own labels, such as VICTOR's badminton racket, and the weight labels are W 1, W2, etc. It corresponds to 2U and 3U, but the former is the most common one. Generally, the weight of all-carbon badminton rackets is 2u (90-94g) or 3u (85-89g), and the weight of aluminum frame badminton rackets is generally above u (95-99g). But there are also a few all-carbon badminton rackets with a weight as low as 80g. For example, the SR and SA models of YONEX ISO-SWING-POWER-500 are only 81g.. The heavier racket is suitable for players with better strength and more emphasis on attack, while the lighter racket is more suitable for players with more emphasis on defense. If you play more offensively, the weight of 2U is better. If you use a 3U badminton racket, you will feel that the badminton racket is a little floating when hitting the ball, and the killing force is insufficient.
A racket with the same weight will feel very different in your hand, because the balance point of the racket is different. If the balance point of the racket is closer to the racket head, it is called [racket head weight]; If the balance point of the racket is closer to the handle, it is called Logger Vick. Generally speaking, the balance point is measured upward from the bottom of the racket in centimeters and inches. According to the principle of mechanics, the weight is proportional to the swing feeling, and the balance point is proportional to the square of the swing feeling. Because of the greater inertia of the racquet head, the racquet head is more powerful but less flexible, which is more suitable for attack. Although the racket with a light head is more flexible, the intensity of hitting the ball is smaller, and the vibration transmitted by the racket will be greater, which is not suitable for players who hit the ball vigorously, but more suitable for defensive control players. In order to accurately control the balance point, a high-quality badminton racket will be equipped with a counterweight in the handle after molding, and the plastic bottom handle at the bottom of the handle will be removed. You will see that the lower part of the wooden racket handle is a hollow cylinder with a plastic stick embedded in it. Its purpose is to adjust the center of gravity of badminton rackets, so that badminton rackets of the same model have the same balance point *, which is also the basic requirement of high-quality badminton rackets.
It should be noted that the above description of the weight and balance point is for a brand-new racket, without strings and extra handles or other accessories. The length of a standard badminton racket is 664 mm, while the length of an extended badminton racket is generally 674 mm. The most important part of the extension is the racket shaft, and the racket frames of some models are also slightly extended. The biggest advantage of lengthening the badminton racket is that it improves the hitting point, can hit the ball with a larger landing angle, improves the ball speed, increases the aggression to a certain extent, and expands the catching area. If you like to kill the ball, lengthening the badminton racket is really a good choice. At the same time, it should be noted that the lengthened badminton racket is more likely to cause wrist and arm injuries than the ordinary badminton racket.
Relationship between material and racket
Nowadays, badminton rackets on the market are dominated by new materials, such as carbon fiber, titanium alloy and high-strength carbon fiber. Because these materials are lighter, stronger and more durable, they can also absorb more shocks and impacts, and at the same time, racket manufacturers have more room to play in the design of racket hardness, ball feeling and hitting performance. When buying a racket, you'd better take a look at what material this racket is made of. Generally, the racket handle and racket frame will be marked with their manufacturing materials, such as high modulus graphite (high strength carbon fiber) and graphite (carbon fiber). Some badminton rackets with the same racket shaft and racket frame are marked with full graphics or full graphite rackets only in one place of the racket frame or racket shaft.
When choosing a racket, we must be careful not to mistake the integrated racket with aluminum frame and carbon rod for a full carbon badminton racket. Generally pay attention to the label on the racket, you should be able to distinguish it. If you are not sure, I have three ways to use it. First, touch the racket frame with your hand. Because aluminum alloy has good thermal conductivity, the racket frame is cool on the mold and the carbon frame is warm. But look at the chord grooves on the racquet frame. The aluminum frame is a concave shallow arc, and the carbon frame is a concave trapezoid. The third is to feel the weight, and the racket head with aluminum frame is obviously biased. As a transition product from aluminum frame to full carbon, I feel that it is not a good choice because of its high price and low performance.
Correct selection of feather line
A badminton racket with excellent performance consists of a racket body and a feather line. You can't decide which feather string to choose just by looking at the price and color. The feather line is as important as the badminton racket. Should I choose a badminton racket with strings or a badminton racket without strings? Mainly depends on the individual's technical level and economic conditions. Generally speaking, a racket with good badminton strings is relatively cheap, and the performance of the badminton strings on it is also relatively poor. Only suitable for beginners, because beginners are not sensitive to the structure, thickness and tension of the feather string. Badminton rackets without strings are generally more expensive, but you have more choices. It is easier to choose a racket that suits your playing style, and you can also match the racket with a badminton line that suits your playing style and feel. It should be noted that some high-end badminton rackets may also wear feather lines, such as most of VICTOR's high-end products, and occasionally YY's high-end badminton rackets.
The type of the string. There are generally two kinds: one is catgut and the other is synthetic nylon thread. The catgut is made of sheep's small intestine, which has good elasticity and good hitting performance. The lighter the color, the better. However, it is easily affected by climate, damaged and costly. At present, the vast majority of synthetic nylon threads on the market are divided into many categories according to their different structures and materials. Before you decide what kind of string to use, you'd better discuss it with the person who wears the string or a knowledgeable friend to find out the balance between the performance that suits you and the impact resistance.
The diameter of the rope. The thickness of the string plays an important role in the balance between the striking performance and the striking resistance of the feather string. Generally speaking, a thinner feather string (less than 0.70mm in diameter) has better hand feel and hitting performance; The thicker the feather string (more than 0.70 mm in diameter), the better the beating resistance and the longer the service time.
Tension of the thread. The tension of the feather string is also called tightness, and the tension is generally expressed in pounds. In order to make your racket conform to your playing style, you must set the tension of the badminton line. The first principle is that if the manufacturer of racket and string indicates the suggested number of pounds on the packaging of racket or string, the tension of string should be in the middle, so that the performance of racket and string can be exerted. If your weight exceeds the recommended weight, the quality of your racket and badminton racket string may not be guaranteed. If you want more flexibility, you should wear a lower number of pounds. The lower the tension of the feather line, the greater the elasticity. On the contrary, the higher the tension of the feather string, the smaller the hitting force, but the better the control of hitting depth (distance). The elasticity of the high-pound feather line is limited, so the slingshot effect of the feather line on the ball is less. Therefore, if your strength is small and you need strength, wear the weight of the feather string lower. If you have more strength, a higher tension will suit you better.
Reduce the risk of arm injury
The most vulnerable parts of badminton arm are shoulder, elbow and wrist. Generally speaking, the main reasons for the above injuries are incorrect hitting posture and improper selection of equipment. Pay attention to the following parts will help you.
1. Reduce the tension (tightness) of the bowstring: A looser bowstring can provide a greater bobbin effect, and you can hit a faster and more powerful ball with less vibration.
2. Choose a racket with a large sweet area: the sweet area of the racket is large, so it is unlikely to touch the non-sweet area when hitting the ball, so there is less chance of vibration and less chance of injury.
3. Check the size of the handle of the racket: If the grip of the racket is too small, when the ball doesn't hit the sweet spot, the torque of the racket will be greater and the damage to the arm will be greater. If the grip is too big, the palm of your hand can't hold the racket and it is easy to get tired. The appropriate size should be that there is a gap of about 5-8mm between the ring finger and the big fish muscle when holding the racket forehand.
4. Check the hardness of the racket: A racket with high hardness requires the player to make greater efforts when hitting the ball, thus making the arm more prone to fatigue and injury. Using a less hard racket, players can hit a more powerful ball without too much force, which reduces the possibility of arm fatigue. At present, the average hardness of feather bats has been greatly reduced compared with previous years. Of course, the softer racquet shaft has less control over the direction of the ball.
5. Pay attention to whether the hitting posture is correct: incorrect hitting posture is an important cause of injury. Such as: the hitting point is too low, behind the ball, the side is not enough when hitting the ball, swinging the arm to hit the ball and so on.
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When choosing a badminton racket, you need to consider the following aspects:
1, the weight of the badminton racket should be appropriate: in fact, the lighter the racket, the better. Although the racket is relatively light and the swing speed is fast, the master will feel useless when spiking, which will affect the hitting power.
2. Check the overall structure of the racket: after you get the racket, wave it to see if you shake your hand. The racket of the vibrator must be too hard (the joint between the racket handle and the racket head is now made of carbon alloy steel); Do not shake hands, indicating that the racket shaft is more elastic. You can also hold the handle with one hand and break it with the top of the racket head with the other hand. The racket is slightly bent, which proves that the racket shaft is more elastic.
3. You can choose a badminton racket that suits you according to your actual situation. For example, in singles, it is suitable to choose an extended racket. For offensive players, you should choose a slightly heavier racket with medium hardness. In doubles, it is best to choose a standard length racket. If you are a defensive player, you should choose a lighter racket.
4. Choose the handle according to the size of each person's hand, and the handle should be comfortable. People with big hands will feel uncomfortable holding thin or square handles; People with small hands can't hold the thick handle firmly. Finally, check whether the whole racket head is deformed, cracked and bent.
5. See if the strings are symmetrical. Each square composed of crossed strings should be the same size, and the tightness of each string should be consistent.
To get a badminton racket, we must first look at the shape of its racket head. Generally speaking, there are two kinds of rackets. At present, there are traditional egg-shaped and square-headed flat-headed racket frames on the market. The shape of badminton racket determines the size of its sweet zone, which is the best hitting zone on the racket face. When the ball falls in the sweet zone, it can give you enough hitting power and ball control ability, so the size of the sweet zone is very important for players, and it is easier for players to play high-quality balls.
Badminton rackets are divided into carbon fiber, carbon-aluminum integration, aluminum-iron integration and aluminum-iron separation according to different materials. The choice of material is directly related to the weight and price of the racket. Generally speaking, all-carbon badminton rackets have the lightest weight, which is the mainstream material at present, mostly 85-94g, and the price is relatively expensive, generally above 200 yuan, while the weight of aluminum frame badminton rackets is generally above 95g, and the price ranges from tens of yuan to more than 100 yuan. A racket with the same weight will feel very different in your hand, because the balance point of the racket is different. If the balance point of the racket is closer to the racket head, it is called "head weight". The ball is more powerful but less flexible, which is more suitable for attack and is also the choice of those who are not strong enough. If the balance point of the racket is closer to the handle, it is called "tapping". Although the lightweight badminton racket is more flexible, it is more suitable for defensive control players and speed-seeking golfers.
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Important parameters of badminton racket
G: Used to indicate the thickness of badminton racket handle, generally 4G and 5G. 4G is suitable for people with big hands.
U: In general badminton rackets, U is used to indicate weight. The specific weight is 3U, 85-89g, 2U, 90-94g, U, 95-99g.
Badminton racket balance point: Why does it feel different to hold a racket with the same quality mark in your hand? This involves the problem of a balance point. If the balance point of badminton racket is close to the racket head, the racket head will feel heavier; If the balance of the racket is closer to the handle, the head will feel lighter. The balance point is the distance from the bottom of the racket, in centimeters or inches. "According to the principle of mechanics, the weight is directly proportional to the feeling of swing, and the balance point is directly proportional to the square of the feeling of swing. Remake is more suitable for attack because of its greater inertia and strength, but its swing flexibility is slightly poor. Although the bald racket is more flexible, the ball it hits is less powerful, and the vibration transmitted by the racket will be greater. It is not suitable for players who hit the ball vigorously and is more suitable for defensive control players. " In order to control the balance point accurately, the mass of the handle is usually changed to control the balance point.
Badminton racket lengthening: the length of standard badminton racket is 664 mm, but the so-called lengthened badminton racket is generally longer than the standard length10 mm. The most important part of the extension is the racket shaft, and some models of racket heads are also slightly extended. The hitting point of the stretch racket is higher, which helps to improve the aggression.
Badminton racquet hardness: When hitting a ball, the ball stays on the badminton racquet for only four thousandths to six seconds. During the swing before hitting the ball and when the racket hits the ball, the racket shaft has a process of bending and recovery, and the ball has flown out of the racket face before the racket returns to its original position. Under the condition that players have the same strength, the softer the bat is, the easier it is to bend in the swing process before hitting the ball, and the greater the bending amplitude is, thus driving the bat head to move at a greater angular velocity and generating greater hitting power. The harder the racket handle is, the less force is transmitted to the ball when hitting the ball, but the transmission of hitting vibration can be reduced. For badminton rackets, the harder the rackets are, the less likely they are to be deformed and twisted when touching the ball. The more power can be transmitted to badminton, the less vibration will be transmitted.
The relationship between hardness and ball control;
1. Directional controllability: When the racket hits the ball, the ball can return according to the hitting direction or angle. The harder the racket shaft and the racket frame are, the higher the stability of direction control. When the ball doesn't hit the sweet area of the racket face, the harder the racket is and the smaller the torque is.
2. Depth control: This refers to the control of the return flight distance (landing point). The control of depth is related to the player's own strength. The softer the racket, the better the depth control.
TI series badminton rackets: TI is the abbreviation of TITIAN, which means titanium; The biggest feature of this series is that the racket head is divided into two semicircles, which are connected by titanium alloy composite materials to increase the hardness of the racket head and greatly improve the ball control ability.
Badminton racket shape: mainly divided into oval and square head shape. The area of the ellipse is very small, but the air resistance is also very small. The square head shape has a large hitting area, but the air resistance is also large. Of course, there are other shapes based on this, not just one.
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