In this era of rapid development, science and technology are progressing, and so are human beings. People began to exercise and keep healthy. Especially sports, are deeply loved by teenagers, middle-aged people and even the elderly. Young people like to play ball and keep fit. Middle-aged people like running; Old people like square dancing and the like. Exercise can not only keep fit and lose weight, but also reduce the risk of various diseases.

Although exercise is of great benefit to the human body, some exercises can also cause harm to people. And exercise in moderation, not excessive exercise, excessive exercise brings great side effects to the human body.

If you exercise too much, the oxygen, nutrients and metabolites needed by the human body will increase accordingly, so you need more oxygen. The heart will beat faster. But if the heart works too fast, it will cause hypoxia. Not only for the body, but also for the mind. If you exercise excessively for a long time, it will do great harm to your health.

There are also some exercises, and improper methods can also cause harm to the body. 1. Too many sit-ups. Doing too much at once will damage the back muscles. 2. The lunge leg press step is too small. Some people are too tired to do lunges, so they take small steps, but they don't know that this will cause great pressure on bent knees and tendons, and even get arthritis after a long time. 3. Push-ups are too far. Doing so will not only be very tiring, but also cause shoulder crush. 4. Stretch your thighs outward. Knees are bent inward, and soles of feet are outward, which makes it easier to hurt yourself.

In short, it is good to like sports, but it should be reasonable and moderate. Don't exercise excessively and wrongly. Not only ineffective, but also counterproductive.