What is the ball used in badminton regular competition?

Badminton with good quality and proper speed is very important for the smooth progress of the game and the interest in fitness. Badminton can be judged from the following aspects:

(1), the appearance of badminton should be neat, the wrapped ball cover should be smooth and wrinkle-free, the feathers should be white, and the insertion angle should be consistent;

(2) The quill pen is slightly thick and straight, and the glue is even. When held by hand, it should be hard and elastic and cannot be deformed;

(3) When trying to play badminton, its flight stability is good, and it does not shake or drift when rotating forward. There should be no obvious difference in the speed of badminton in the same bucket.

At present, manufacturers who regularly produce badminton have their own set of standards for the speed (weight) of badminton. Generally, the top cover of the bulb will be marked with: 76, 77, 78, 79 or 1, 2, 3, 4. The smaller the tag value, the slower the ball speed, and the larger the tag value, the faster the ball speed. Badminton is slow when it is light, but fast when it is heavy. Badminton ball is very light, and the speed of badminton depends on the weight of badminton first; Secondly, the temperature, the temperature and the altitude of the playground have great influence on its weight. Generally, when the temperature is high and the humidity is high in summer, or when the waves are big, Badou should choose a lighter badminton. In winter, when the temperature is low, the climate is dry, the humidity is low, or the altitude is low, it is necessary to choose heavier badminton.

Comparison between badminton weight selection and air temperature

Ball 4.74g 76# 1# used at high temperature in summer;

Ball 4.8~4.9 grams 77# 2# The temperature is slightly higher in spring and autumn, and people feel very comfortable. The temperature is around 25 degrees Celsius.

The temperature of ball 5.0 ~ 5.2g 78 # 3 # is slightly lower in spring and autumn, and the human body feels slightly cold, and the temperature is below 18 degrees Celsius.

Ball 5.3g 79# 4# 5 degrees Celsius in winter.

Badminton is not as strong as other balls. Pay attention to the following points when buying:

1, distinguish the types of badminton:

Badminton commonly used at home is usually used outdoors, and it is called red-headed badminton in shops. Because the base of this ball is made of red rubber, it is easy to play and has good elasticity, so it can be played far without much effort.

The game ball is white-headed badminton, also called indoor badminton. The materials used for its base are cork inside and white sheepskin outside, and the selection and production are very strict.

All-plastic badminton, each ball is a whole, its manufacturing process is very simple, there is no need to knit and bind, there will be no problem of hair loss, and the cost is relatively low, but it is not as good as the first two.

2. Criteria for choosing badminton.

It depends on the quality of the badminton base. The rubber thickness of the red ball should be uniform and glued firmly. The cork of the white ball should be 25mm in diameter, round in shape, soft in wood, and thin and strong in sheepskin film. When choosing whether the elasticity of the ball holder is good or not, you can pinch it by hand or gently hold the ball on the racket several times.

According to whether the feathers are fastened, each badminton is required to fasten 16 feathers. The best feather is goose feather. Because the goose feather tube is hard, straight and durable, the falling speed meets the standard. Chicken and duck feathers are not as good as goose feathers. Its fin tube is thin, the wall is thin, and it often bends. When choosing feathers, the whiter the feathers, the better (except specially dyed ones). Feather length should be 60 ~ 70 mm, the length should be the same, the interval should be even, the feather thickness should be the same, and there should be no problems such as inverted hair, broken stem and moth-eaten, otherwise the ball will not go right.

For the game ball, it needs to meet the requirements of badminton in the game rules. There are two small marks on the right service area of the regular badminton court near the service line after doubles, and the position between them is the badminton ball speed detection area.

When checking the ball, hit the ball forward and upward with a low hand outside the end line, and the flying direction of the ball should be parallel to the sideline. The ball that meets the standard speed should fall in the area between 0.53 and 0.99 meters from the outer edge of the opponent's end line (that is, between two small marks).

When testing the speed of badminton, you can ask the athletes for help. Generally, athletes who choose to test the ball speed should not choose particularly strong or weak athletes, but choose male and female athletes with relatively moderate strength to test. After the test, choose a speed (weight) as the game ball. Match balls with the same speed (weight) should be used in the same field.