Nbl rule

The specifications of the basketball court are stipulated according to the rules of basketball competition. The standard basketball court is a rectangular flat with a length of 28 meters and a width of 15 meters. The stadium must have clear boundaries. There are no obstacles within at least 2 meters outside the boundary, and there should be at least 2 meters between the boundary and the audience.

The boundary of the long side of the stadium is called the sideline, and the boundary of the short side is called the end line. The horizontal line parallel to the end line connecting the midpoints of two sideline lines is called the center line, and the center line should extend 15 cm outside the sideline lines on both sides. A circle drawn with the midpoint of the center line as the center and 1.8m as the radius is called the middle circle. The free throw line is a straight line parallel to the end line, in which the point must be in a straight line with the midpoint of the end line and the middle line. The area formed by the penalty line and the two diagonal lines connecting the two ends of the penalty line is called the forbidden area (three-second zone).

A semicircle with the center of the penalty line as the center and the diameter of the penalty line as the penalty area. There are dividing lines on the diagonal lines on both sides of the penalty area for players to use when making free throws. The area outside the arched line at both ends of the field is a 3-point shooting area.

Every line on the court must be very clear, and the width of the line is 5cm. In the survey of the site, all lines in the site are counted from the outer edge except the sideline and the end line.

Basketball court facilities related work

1. backboard: both backboards should be made of transparent materials, preferably reinforced safety glass, and the hardness is equivalent to 3 cm thick wood. The size of the backboard is 1.80 m in width and 1.05 m in vertical height, and its lower edge is at least 2.90 m from the ground. The surface of the backboard should be smooth, and a rectangle with a width of 59 cm and a height of 45 cm should be drawn around. The upper edge of the bottom line of this rectangle must be connected with the upper end of the ring.

2. Basketball: Basketball includes fences and nets. Basket-Made of solid iron, the inner edge is at least 45cm in diameter and at most 45.7cm in diameter, and painted orange. The minimum diameter of the metal hoop is 1.6 cm and the maximum diameter is 2.0 cm. Nets-should be white, hanging on the basket, its purpose is to make the ball have a slight resistance after entering the basket. The fishing net should have 12 meshes to be hung on the hoop, with a minimum length of 40 cm and a maximum length of 45 cm.

3. Ball: Basketball must be a perfect circle with orange color, and its shell must be made of leather, rubber or synthetic materials. The degree of air pressure in the ball falls on the playing field about 1.8m from the bottom of the ball, and its rebound height should not be lower than 1.2m or higher than the top of the ball1.4m..

4. Timer: Timer should be installed where everyone can clearly see it, so as to show the game time, scores of both sides and the number of fouls of the team.

5.30-second timer: The 30-second timer should automatically count time and count down digitally, and the display unit is seconds.

6. Record forms: The record forms of all official competitions organized by FIBA must be approved by FIBA.

7. Foul card: It should be white, and the minimum size of the number should be 20 cm long and 10 cm wide. The 2×20-minute competition system is numbered 1 ~ 5 (1 ~ 4 is black and 5 is red). 4× 12 minutes, the number is 1 ~ 6 (1 ~ 5 is black and 6 is red).

8. Team foul sign: The team foul sign should be red, at least 20 cm wide and 35 cm high, and put it on the record table for everyone to see clearly.

Introduction to Work-related Basketball Knowledge

Technical analysis of passing;

A holding the ball: two hands and one hand;

B ball: two hands, one hand;

Flight route of ball C: straight line, arc line and broken line;

Landing point:

The correct passing technique should be hidden, timely, fast and in place.

The correct catch technique should be: get rid of the defense, get stuck in the previous step and reach out to catch the ball.

Double dribbling technique

Key points: ball control ability, skillful footwork, coordination of hands, feet and waist;

Dribble timing:

Advance from backcourt to frontcourt; Play fast break; When you can't pass the ball;

Half-court attack needs to adjust the passing angle to create offensive opportunities for partners.

Three technical elements of shooting:

1, hold the ball;

2. Hand movements.

(1) aiming method;

(2) the arc of shooting;

(3) the rotation of the ball.

Four three-pointers:

It is an added rule in the basketball rules of 1984 ~ 1988: if the ball hits the place 6.25m away from the center of the basket, it will score three points.

After the implementation of the rules, the hit rate of long shots and long shots has been greatly improved.

Five elements to improve shooting accuracy;

Suitable shooting curve:

The high curve ball has a long flight distance;

The area of low curve ball exposed under the ball is small;

The area of the basket where the curve ball is exposed under the ball is close to the flying distance of the big ball, so the curve ball should be shot;

Long-distance shooting should make the ball spin back.

The birth of basketball competition rules is related to works.

Basketball was invented by Mr james naismith of Springfield University in 189 1. The earliest rules of basketball game were also formulated by Mr Naismith.

At that time, the purpose of his basketball rules was:

(1) Basketball is a game played by hands, and the ball is round;

② Walking or running with the ball in hand is not allowed;

(3) Athletes can go anywhere on the field as long as it does not affect or hinder other athletes;

④ Physical contact between athletes is not allowed;

⑤ The hoop should be horizontal.

According to these five basic principles, Mr. naismith made the most primitive rules of basketball match. There are 13 original basketball competition rules. The basic content of article 13 is:

1. Players can throw the ball in any direction with one hand or both hands.

2. Players can catch the ball in any direction with one hand or both hands, but they must never hit the ball with their fists.

Players can't take the ball away.

You must hold the ball with your hand, but you are not allowed to kick the ball with your head and feet.

5. Players are not allowed to use shoulder bump, hand pull, hand push, hand bump, foot trip and other methods to deal with opposing players. Any player who violates this rule will be regarded as the first foul and will be forced to stop playing until he hits a ball.

Participate in the competition. If you intentionally hurt the opposing player, you will be disqualified from participating in the whole game and will not be allowed to substitute.

6. hitting the ball with fists violates rules 3 and 4.

7. If either side fouls three times in a row, it is counted as the other side's goal. Continuous foul refers to: during a period of time, the opposing team members did not foul, while their own team members fouled continuously.

8. If the defender doesn't touch or interfere with the ball, when the ball is thrown into the basket and stays in it, it is considered a basket. If the ball stops at the basket and the other team touches the basket, it is also a fortune teller.

9. When the ball is out of bounds, the ball will be thrown into the field by the first person who touches it. If there is an argument, the referee will throw the ball into the field. Throw a foul ball for five seconds. After more than 5 seconds, the ball was awarded to the opponent.

10. The referee is the referee of the player, and he has the right to call a foul. When a team fouls three times in a row, he will notify the assistant referee. He has the right to declare an athlete disqualified.

1 1. The assistant referee is the referee of this ball. He can decide the time of the ball in the game, he should count the time, decide the stroke of the ball, record the number of strokes of the ball, and bear the responsibility that the referee should bear at ordinary times.

12. The game will be played in two 15 minutes with a 5-minute break.

13. The team that hits the ball the most wins. If there is a draw, with the consent of both captains, the game can be postponed until another goal is scored.

Although the original 13 basketball competition rules are not systematic and complete, and some terms are not clear enough, they have played a great role in promoting the development of basketball in the early stage. In particular, basketball has developed into a modern basketball sport today, and the technical and tactical level is getting higher and higher, so the rules are even more important. It requires strict, scientific and systematic management of basketball games.

Evolution of Basketball Competition Rules Related to Works

The revision of>& gt& gt& gt& gt rules promotes the development of basketball, and the continuous improvement of basketball skills and tactics promotes the appropriate revision or supplement of imperfect rules, thus making basketball develop in a healthy and advanced direction.

Rules and basketball skills and tactics, like productivity and relations of production, are complementary, interdependent and mutually reinforcing. By affirming, denying, allowing or not allowing, the rules ensure the normal progress of basketball games and promote the healthy development of basketball. The action that conforms to the rules of the field is the correct action, and vice versa.

The rules have developed from the initial 13 to the present 58, and the basketball skills and tactics have developed from the initial simple low level to the present high level, which is the result of their mutual restriction and promotion for many years. For example, the development of dribbling technology from the initial elbow joint as the axis to the current shoulder joint as the axis is precisely the result of the constant affirmation of the developing technology by the rules. Now the rules clearly point out that the symbol of the end of dribbling is the moment when both hands touch the ball or dribble with the palm up, and the thumb exceeds the vertical plane to end the dribbling. Always in your hand.

Down, the thumb does not exceed the vertical plane, and the ball can't stay in the hand. Therefore, the modern technology of arm dribbling with shoulder joint as the axis and one-handed back-pulling and back-turning dribbling has been affirmed in legal form. Another example: the development of shooting techniques, from the initial in-situ two-handed chest shooting to top-down dunk, one-handed or two-handed basketball and other superb techniques, the rules clearly stipulate that all players are shooting. Therefore, modern technologies such as dunk and makeup have developed rapidly. In recent years, there have been many techniques in the competition, such as back jump shot, back jump shot and hook jump shot, which are also determined by the basic principles of dealing with physical contact and foul, such as vertical plane principle and flying man principle. When dealing with fouls, the guiding ideology of offensive and defensive balance is particularly emphasized, forcing and promoting shooters to adopt various forms of jump shot techniques, get rid of defense and avoid hitting people because of fouls, so as to achieve the goal of scoring and promote the continuous development of defensive tactics.

Under normal circumstances, FIBA will revise and supplement the rules every four years, with the purpose of promoting the further development of basketball skills and tactics, limiting rude movements and making the game develop in a civilized, clean, intense and hard-working direction.

The change of rules is unknowable, and no one can change it at will on a whim. It is carried out according to a certain review purpose. The specific guiding principles for modifying the rules are:

1. Fair. This is the basis for modifying the rules. Rules should be fair to both sides of the game. Because the basketball game is a contest of basketball consciousness, skills and tactics and physical quality between the two sides under the same conditions of time, space, venue and number of people.

2. Balance. Balance (or balance) means that both offense and defense must be balanced. If a game is easy to score or difficult to score, it will make the game dull and not exciting, then the wonderful charm of the basketball game will be lost.

3. Definition. The definition of rules should be concise and accurate.

4. compile. Rules should be compiled, avoid duplication, be consistent and not contradictory.

5. Be brief. The rules should be short and to the point, and avoid verbosity that makes people difficult to understand.

6. Exceptions. There are many rules in front of the rules. If there are no exceptions (that is, comments), it is difficult to enforce the rules. The exception is to ensure the implementation of positive law.

7. Safety. Rules should ensure personal safety and the smooth running of the competition in a good environment and atmosphere.

8. power. The referee must be given the power to execute the rules competently and authoritatively in the competition.

9. continuous. The rules should minimize the number of interruptions of the game, so as to ensure the continuity of the game and make the game more compact and exciting.

10. No profit. Rules should make no one in the game benefit from violating the rules, so that the game can be played fairly and reasonably.

Occupational injury in basketball and its prevention

Playing basketball is prone to "bone and joint" injury. That is, young people whose bones are not hardened are most prone to knee edema when their knees are strongly stimulated.

Preventive methods; Do some exercises that strongly stimulate the knees, such as total knee flexion and rabbit jumping. Don't go too far, and at the same time train and strengthen the exercises around the knee joint.

1. Ankle sprain

Before practice, wrap your ankle with adhesive tape (tripping paste and bandage) to prevent sprain. However, the most effective way is to prepare the ankle and kick the ball unilaterally, and at the same time strengthen the muscles that should not be done. If you are unfortunately sprained, first apply cold compress to the affected area and apply appropriate pressure. Only cold compress with ice water, press with sponge, and wrap it with elastic bandage from above the sponge.

2. Finger tingling is caused by strong impact on fingers.

Prevention method: fully prepare for finger movement. Finger injuries can be divided into five types according to the degree: 1. Sprain, 2. Dislocation, 3. Fracture, 4. Tendon rupture, 5. Blunt injury (split skin). If a sprain occurs, its treatment method is the same as that of other parts, and cold compress should be carried out first. After 2 ~ 3 days, the part should be kept warm and massaged at the same time. When dislocated, you should be able to bear the pain, let the medical staff straighten your fingers, restore them to their original state, and then dispose of them as before. As for serious finger injury, fracture and tendon rupture, it is not allowed to move. It is the best policy to send a doctor for treatment quickly.

3. Muscle dislocation

A sharp force (flexion and extension) is applied to the muscle, which breaks the muscle fiber or part of the muscle membrane in the muscle and leads to internal bleeding. Precautionary measures: Rub the muscles of all parts before practice to relax them, especially the players with hard muscles, and pay special attention to them in hot and cold seasons. The treatment method is as follows: if it happens in the leg, fix the knee for 2 ~ 3 days first, do not move at will, and use water or cold compress at the same time. Bandage can prevent the expansion of internal bleeding. After this treatment, keep warm a little and engage in relaxation activities. The characteristics of treatment are: after the internal bleeding stops, although the body still feels stiff, it should be slightly active.

4. Foot swelling and pain

The movement of the feet; Especially when I practice moving and stopping for a long time, I feel that my heel hurts twice. This disease is also called calcaneal osteopathy, because when the foot looks at the ground, the fatty tissue between the bone and the heel skin is damaged by many sharp impacts. Its prevention method: pad a soft sponge under the heel or pad cotton on the inside of the heel, which can prevent the subcutaneous tissue from being pressed to one side despite the force from below. The method of treating heel pain is not easy to operate. Only before the pain is relieved, try to avoid the strong impact on the heel, and then do treatment after practice, such as hot compress with a warm wet towel. Therefore, if this disease is ignored, it will often become a chronic disease and it is difficult to treat. It is best to treat the symptoms at the early stage.

5. Knee injury

Knees are easily injured by heavy injuries. Prevention: Use knee pads. If you get a strong blow or impact, the treatment depends on the situation. If it is serious, you must have an operation.

6. Foot injury caused by friction of sports shoes

As long as you wear clean, wrinkle-free socks and sports shoes that fit your feet, it should have a certain preventive effect. If there are blisters caused by the friction of sports shoes, don't break them rashly. It is best to sterilize this part first, then squeeze out the liquid wrapped with sterilized stitches, and then post an OK itinerary.

7.corns

This should be it.