First, running is a kind of whole-body exercise, which can make the muscles of the whole body contract and relax rhythmically and make the muscles slim.

With the increase of vitamins, the content of protein increased. Muscular development is one of the signs of bodybuilding.

Second, bones are the scaffolding of the body and the lever of human activities. Teenagers in the growth and development period insist on running.

Step can improve blood circulation, increase the nutrient supply of bone cells and improve the growth ability of bone cells.

Promote the normal development of bones. The metabolism of the elderly is weakened, the muscles are gradually shrinking and the bones are shrinking.

There are more and more bone and joint diseases caused by sexual changes. Persisting in running can strengthen metabolism and delay bones.

Degeneration can prevent the occurrence of senile bone and joint diseases and delay your aging.

Third, the heart is the general hub of blood supply to the whole body and the driving force of life. Long-term running will make your heart muscular.

Strong, protein and myoglobin increased. The athlete's heart can be clearly seen under X-ray fluoroscopy.

Bigger than the average person, plump in appearance and strong in pulse. The average person's heart volume is 765-785 ml, but it is very strong.

The blood volume of people who exercise can reach1015-1027 ml, and their heart rate is slower than that of normal people 10-20 beats/min.

The work of the heart will lighten the burden. On the other hand, running can enhance the endurance of the heart. As we all know,

When the average person's heartbeat exceeds 100 beats/minute, he will feel dizzy, flustered and breathless. And long-term runners,

Can endure to 150 times/minute.

Fourth, people's life activities are inseparable from oxygen for a moment, inhaling fresh oxygen and exhaling carbon dioxide. Measure breathing

Important signs of functional health are vital capacity and maximum ventilation. Running can develop respiratory muscles and increase vital capacity.

Increasing 1-2 liters, the maximum oxygen uptake of trained athletes can be increased by 33-60% compared with that of ordinary people.

5. Running can enhance gastrointestinal peristalsis, increase the secretion of digestive juice and improve digestion and absorption.

So as to increase appetite, supplement nutrition and strengthen physique.

6. For women, running helps to regulate menstruation and reduce gynecological diseases. American obstetrician and gynecologist Ge Xiang.

Jed investigated the menstrual cycle of 394 female athletes in the New York Marathon 65438-0979, and found that 26%.

Among the women with menstrual disorders, 65,438+07% resumed menstruation. This is because of running.

Step increases metabolism, promotes digestion and absorption, regulates nervous system function and improves endocrine function.

Seven, running can temper people's will and perseverance, enhance toughness and patience, improve sensitivity and promote the environment.

Adaptability. People who insist on exercising for a long time have three characteristics when completing quantitative work: first, they act quickly;

Second, it has great potential and can exert its maximum functional potential to complete the task; Third, recover quickly and eliminate fatigue.

Thoroughly, you can quickly return to a calm level. Attachment to life lies in movement.

People's lives have generally improved, but there are more and more physical problems. One reason is the neglect of physical exercise. To make the effect of physical exercise better, we must follow the principles and requirements of scientific physical exercise. Pay attention to the following questions when exercising:

All-round exercise

All-round physical exercise is the basis of balanced development of the body and improvement of health level. If you practice what you think is fun just because you are interested, you won't get all-round results. The contents of physical education teaching include walking, running, jumping, throwing, climbing, hanging, supporting, skills, supporting and jumping, ball games, games and so on. The purpose of arranging such rich exercise content is to give the body a comprehensive exercise.

Exercise regularly.

The effect of physical exercise also depends on whether you often participate in activities. According to the principle of "use in and waste out", if you don't exercise regularly, your sports skills will decline and your physical function will decline, so you can't guarantee your health.

brick by brick

Doing physical exercise or learning sports skills should be done step by step from easy to difficult. In the process of exercise, the exercise load should be increased from small to large, so that the body can gradually adapt.

Be safe.

Make full preparations before exercise, and finish the activities after exercise. According to the characteristics of sports events, unsafe factors in the surrounding environment (including venue equipment) should be considered to prevent injury accidents.

Physical health care and self-examination methods:

1. Sleep: People who exercise regularly will fall asleep quickly, sleep soundly, rarely dream, and get up energetic. If there is insomnia, repeated waking up, dreaminess, and poor spirits after getting up, if there is no other reason, it is necessary to check whether the exercise mode and exercise load are appropriate.

2. Appetite: People who exercise regularly have a good appetite. Sometimes, due to excessive exercise load or sweating, excessive water and salt loss will reduce appetite. It's best to eat about half an hour after exercise, so that your body can return to a quiet state and your appetite will be good.

3. Weight: In the early stage of exercise, due to the enhanced metabolism, the body consumes more fat and water, and the weight may be reduced. After a period of time, due to the changes in muscle mass and volume, the weight will remain at a relatively stable level. With the increase of age, the weight should gradually increase. Under normal circumstances, after each exercise, the weight will be reduced more or less, and it can be restored to its original level after rest. You can observe the influence of exercise on your body by measuring and comparing your weight before and after exercise.

Q:

Help me find some. Around this theme. Don't digress, thank you. The number of words should be 3000.

Answer:

Is this not good? I think it's good.

Q:

Not enough words?