But according to the classification of different players, basketball also has different modes.
There are three main models: #7, #6 and # 5;
1, standard adult men's ball: the circumference of the ball is about 75-76 cm and the diameter is about 24.6cm；;
2. Adult women's standard ball: the circumference of the ball is about 70-7 1 cm, and the diameter is about 22.6cm；;
3. Junior ball: the circumference of the ball is about 69-7 1 cm and the diameter is about 22.6cm；;
4. Children's ball: The circumference of the ball is about 56-57 cm, and the diameter is about 18 cm.
Extended data:
Basketball, English, originated in Massachusetts, USA, and was founded by james naismith on June 189 1 day+February 2 1 day. It is the core event of the Olympic Games and a hand-centered physical antagonistic sport.
189165438+February 2 1 was invented by james naismith, a physical education teacher at the YMCA Training School in Springfield, Massachusetts, USA. From 65438 to 0896, basketball was introduced to China, and in 2002, Yao Ming was selected as the No.1 in NBA, which opened a new basketball craze in China.
1904, the 1 th basketball exhibition was held in St. Louis Olympic Games. 1936, basketball was listed as an official event of the Berlin Olympic Games [1]? . From 65438 to 0992, the Barcelona Olympic Games began, and professional players could participate in Olympic basketball games.
The main international basketball organization is the International Basketball Federation (International Amateur Basketball Federation), founded in 1932 and headquartered in Geneva, Switzerland.
The highest level basketball game in the world today is the NBA game.
The highest league representing China is the China Professional Basketball League (CBA).
Basketball has the following sports characteristics:
1, antagonism: The duration of basketball can be long or short, but participants are required to run quickly, take off suddenly and jump continuously to compete for agility and strength.
2. Collectivity: Basketball requires not only athletes' technical and tactical abilities, but also their wisdom, courage, will, vitality and creativity in the competition. Players must also have a brave and tenacious fighting spirit and a spirit of unity and cooperation.
3. Appreciation: In the basketball game, you can enjoy skillful dribbling, clever passing, accurate shooting, witty steals, wonderful dunks and surprising blocks, plus the alternation of attack and defense and confrontation, which makes the two sides fight bravely and the situation on the field change dramatically, which can make the players and the audience feel psychologically satisfied and happy.
4. Interesting: Basketball is simple and interesting, which can vary from person to person, from place to place, from time to time and from need. By changing all kinds of activities, basketball is more convenient, attracting people's participation, achieving the purpose of invigorating the body and mind and strengthening the body, thus improving the civilized atmosphere of society and enriching people's amateur cultural and entertainment life [4]? .
5. Fitness: By participating in basketball, people can not only keep fit, but also develop their own personality, self-confidence, aesthetic taste, willpower, initiative and self-discipline, which is also conducive to cultivating the moral quality of unity and cooperation, respect for opponents and fair competition.
References:
Baidu encyclopedia-basketball