Baseball players are divided into offensive and defensive sides. They use bats and gloves to play in a fan-shaped baseball field. What common sense do you know about baseball? Here, I would like to introduce 9 pieces of common sense information about baseball to you, hoping to help you.

1. Name of World Amateur Baseball Management Organization: International Baseball Federation is the world amateur baseball management organization. IBA is the abbreviation of International Baseball Federation.

2. Referees in baseball games: Referees include one referee, one ball referee, three basic referees and several scorers. The referee is responsible for shouting "the ball" or "hitting the ball" with the prescribed gestures. The referee of the division judges safety and exit.

3. Composition of baseball team: A baseball team consists of 9 players. In fact, a team can have 20 players, but only 9 players can play. There is no limit to the number of substitutes. But the substitute can't play twice.

4. Specification of baseball field: In short, the stadium is divided into infield and outfield. The infield is square. There are bases on the four corners, and the infield is also called "square". The infield is surrounded by two boundary lines between the out-of-bounds area and the other two sides of the out-of-bounds area. [The infield is square, with two sides adjacent to the outfield and the other two sides adjacent to the out-of-bounds area.

5. what kind of ball the batter hits is called a home run: the batter can hit a ball that runs all bases and returns to the home plate, which is called a home run. Most home runs fly off the fence from the infield.

6. Basic personal skills of baseball players: Basic personal skills include hitting, pitching, defense, accurate passing, running and stealing bases.

7. How the pitcher throws the ball: You can throw the ball in various ways, such as curve ball, slider ball, knuckle ball and fastball.

8. Essentials of successful batting: The most important thing is the stance, back pull, stretch, swing, batting and subsequent actions.

9. What are the defensive positions in baseball? Baseball defensive positions include pitcher, receiver, first baseman, second baseman, third baseman, shortstop, left fielder, center fielder and right fielder.

The health benefits of baseball.

1 eye

People who insist on long-distance running spend about 1 hour looking straight into the distance every day, which is a good relaxation for their eyes. If there is a school-age child at home, he can keep running every day, and the chance of myopia will definitely be reduced.

Neurobiologists at the University of California confirmed through experiments that running may be an effective way to treat some eye diseases. In the experiment, the mouse was blindfolded. Then the mice were divided into two groups. A group of mice were forced to run in a wheel for several hours, and the neurons in their visual cortex were completely * * *. The other group of mice did not move. After a period of time, the vision of the first group of mice completely recovered to the level before being blindfolded, while the vision of the second group of mice recovered slowly and incompletely.

2. Neck, shoulders and spine

People who often sit in front of the computer have more or less problems with their cervical vertebrae and shoulders. Correct running posture requires straight and relaxed back, and long-term persistence will greatly improve the discomfort of cervical spine and shoulders.

3. Heart

Sticking to running will give you strong heart and cardiovascular system functions. When the maximum oxygen uptake increases, the oxygen delivered to various organs of the body increases greatly, and the working quality of various organs naturally improves greatly. In addition, middle and long-distance running will accelerate blood circulation, so that the coronary artery has enough blood to supply the myocardium, thus preventing various heart diseases. Through the movement of lower limbs, it can promote venous blood to return to the heart and prevent venous thrombosis.

4. Blood

With a strong cardiovascular system, the blood quality of runners is better than that of ordinary people. The adaptability of the body to long-term middle-distance running can improve metabolism and reduce blood lipid and cholesterol levels.

5. Abdomen

A flat abdomen or obvious abdominal muscle groove is the dream of many people. Many fitness instructors' suggestions and abdominal ripper exercises that are wildly circulated on the Internet can help you make your abdominal muscles stronger, but you also need aerobic exercise such as running to get rid of the thick fat package outside your abdominal muscles. Of course, we should stick to it, because belly is the most cunning, and if we relax a little, we will fight back.