Sports common sense to know! Sports trivia!

The origin and development of sports.

As an important part of human culture, sports have gradually formed and developed with the development of human society. According to the research of historians and archaeologists, human beings have passed on walking, running, jumping, throwing, climbing, and climbing to the next generation as the most basic skills and abilities of production and daily life as early as primitive times. This is the germ of human teaching, but also the germ of physical activity.

The development of sports is closely related to the development of education, military, science and technology, as well as people's religious activities and leisure and entertainment activities. It must be pointed out that in the whole process of its historical development, sports are constrained by and serve a certain political economy. The development of sports has gone through the following three periods:

the primitive embryonic period of sports; consciously engaged in sports; The period of formation and improvement of the sports system. After these three periods, a modern sports system was gradually formed; Among them, the development of competitive sports is the main driving force for the development of modern sports.

Sports concept. The word "sports", according to the world's sports data, was first used by the French in 1760 when discussing the issue of children's physical education in French newspapers and periodicals (Education Physique), and now it is widely used in the world to refer to "physical education". Its original meaning refers to education by means of physical activity, which literally translates to education of the body.

The word "sport" is generally believed to be derived from the Latin "disport", which originally meant to leave work to play, play, engage in recreational activities, etc. Later, a concept with a new meaning was gradually formed, namely --- competitive sports (competitive sports).

What are the essentials of the standing long jump?

Pre-swing: open your feet left and right, shoulder-width apart, swing your arms back and forth, swing your legs straight when swinging forward, bend your knees to lower your center of gravity, lean your upper body slightly forward, and swing your hands back as much as possible. Key points:

The upper and lower limbs move in coordination with each other, stretch and bend the center of gravity when swinging, and lean the upper body slightly forward.

Take off and take off: Kick the ground quickly and hard with both feet, and swing from back to front and up with both arms slightly bent at the same time, jump forward and up in the air, and fully spread your body. Key points:

Kick the ground quickly and powerfully, the leg pedal and hand swing should be coordinated, the air body should be sufficient, and the forefoot before the socks emphasize the instant kicking action before leaving the ground.

Landing cushioning: Tuck your abdomen and raise your legs, stretch your calves forward, swing your arms back vigorously, and bend your knees to cushion on the ground. Key points: Grasp the timing of the calf extension, bend the leg and extend the arm back, and go forward and not backward after landing.

The original formula is y=x 2-2sinx, the derivative is 1, 2-2cosx, so that the derivative is equal to 0, cosx=quarter, because it is not a special value, so let m be the value of x, so that cosx=quarter, the value of x, according to the image of cosx,

1. Exercise is good for health, and it needs to be insisted on and reach a certain amount of exercise;

2. The time of exercise, morning or afternoon, depends on your area; Far away from the city, you can choose the afternoon; near the city, in the morning; (The cause of the air).

3. Before exercising, tendon stretching and moving joints should be done;

Fourth, after the exercise, you need to relax the muscles, and you can stop Bi Chong if you don't close the slag;

5. Take a shower after exercise;

6. During exercise, try to control the intake of water, and eat fruits with high vitamins such as bananas and kiwifruit;

Don't eat too much before exercising, or you will feel a stomachache when you move before your luck!

Don't stop abruptly after exercising, it's best to walk for a while to buffer!

You just remember to never exercise at ten o'clock in the morning with years of experience.