Harm of excessive aerobic exercise

The harm of excessive aerobic exercise. Aerobic exercise is a common way of exercise. Many people like aerobic exercise, and they should also pay attention to the amount of exercise. The following is some information I have compiled for you about the dangers of aerobic exercise. Let's have a look!

Excessive aerobic exercise harms 1 excessive aerobic exercise harms cardiovascular system.

Everyone knows that jogging can exercise the cardiovascular system and enhance cardiopulmonary function. But you must not know that excessive jogging can not only promote health, but also make your cardiovascular system pass the finish line ahead of time.

Normal heart pumps about 5 liters of blood per minute at rest, but this number can be increased by about 5-7 times during strenuous exercise, reaching 25-35 liters per minute, which is a heavy load on the heart. Moderate training can exercise cardiopulmonary function, but when high-intensity exercise lasts 1-2 hours, the overworked heart will begin to be damaged.

Excessive blood volume will stretch the myocardium and cause slight damage to myocardial cells. Therefore, immediately after the marathon, the blood samples of runners will be examined, and it will be found that troponin, CK-MB and other indicators symbolizing myocardial cell damage are significantly increased. These indicators are tools used by doctors to diagnose myocardial infarction. )

After a long period of strenuous exercise, the heart will try to repair the damage. However, if the owner of this heart keeps training with high intensity and long distance, minor injuries will gradually accumulate into irreversible structural changes.

Stress hormone elevation

20 1 1 German scientists found that amateur aerobic athletes have more corticosteroids in their hair than ordinary people. What does this mean?

Corticosteroids are hormones released by the body when it encounters stress. Corticosteroids can help the human body to tide over the difficulties when it encounters physical or psychological stress. Without the help of corticosteroids, everyone is a strawberry family who can't resist stress.

Long-term increase in corticosteroids (which means that the body suffers from chronic stress) will bring various adverse effects: high blood pressure, high blood sugar, decreased immunity and loss of muscle tissue, which are the body's responses to persistent and excessive stress.

The accumulation of corticosteroids in hair can reflect the chronic stress of the body in the past few months. The higher the corticosteroids in runners' hair, it may mean that their bodies are under more stress.

Aerobic exercise and total mortality

In an observational study of 52,600 people, scholars found that moderate exercise can significantly reduce the total mortality. However, people who run more than 20 miles a week do not get the health benefits of running: their mortality rate is similar to that of couch potatoes who do not exercise.

Danish scholars have come to a similar conclusion: people who run for 2 or 5 hours a week seem to benefit the most, and longer exercise time will not make people healthier.

Harm of excessive aerobic exercise 2 Benefits of insisting on proper aerobic exercise every day.

1, insist on aerobic exercise.

Experts say that proper physical exercise can enhance the body's resistance. The recommended sports are brisk walking, jogging and swimming.

Some people like dancing, so it's better to choose more open places such as parks or squares than closed rooms. If one of your partners has a cold, you'd better stay away.

2. Exercise intensity is moderate.

Experts pointed out that the temperature difference between morning and evening in spring is large, and the exercise intensity should not be too large. Moderate intensity is the most suitable, that is, feeling a little tired and panting after exercise.

Intensity can also be measured by calculating heart rate. Generally, it is best not to exceed 170 minus the age after exercise.

3. Don't exercise with illness.

Some people think that sweating after a cold can relieve symptoms, but it is not. Even after a slight cold, you should avoid strenuous exercise.

Because of high-intensity exercise, although the symptoms can be temporarily relieved, the immune cells will enter a state of rest after exercise.

It is not conducive to resisting the cold virus, which may lead to the rebound of the original symptoms and even cause other diseases.