1. It is not advisable to blindly pursue the amount of exercise.
Children in early adolescence have incomplete physical development: physically, their muscles are thin, their bones are immature and their internal organs are immature; Psychologically, people are too cautious and self-estimated. If you suddenly engage in large-scale activities with high intensity, heavy load and fierce confrontation on impulse or interest, it will cause sports injuries, such as fractures, muscle strains and joint sprains.
2. Lack of pertinence is inappropriate.
The development of various organs and tissues of the human body has its own optimal period, and the most targeted items should be selected for fitness exercise. For example, 12 ~ 15 years old (female 1 1 ~ 13 years old) is a sudden increase in height, with an average annual increase of 7 cm. At this time, stretching exercises such as ball games, swimming and running are helpful to grow taller. For another example, the age of 15 ~ 17 (female 13 ~ 15) is a period of rapid muscle growth, and strength exercises such as gymnastics and weight-bearing are helpful to strengthen muscles. If you grow taller, the effect of fitness will be greatly reduced if you exercise, load and run with long muscles.
This project should not be one-sided.
All kinds of sports have advantages and disadvantages for the healthy development of teenagers, so we should take full exercise. Generally speaking, football has a good exercise effect on lower limbs and heart, but it has a poor effect on upper limbs and trunk; When performing instrumental gymnastics, the upper limbs and trunk exercise more, while the heart and lower limbs exercise less. Therefore, according to the characteristics of personal hobbies, it is an ideal exercise method for teenagers to focus on one or two sports, supplemented by multi-item exercise.
4. It is not appropriate to reverse the "biological clock".
The physiological and psychological characteristics of human excitement and inhibition are related to the "biological clock" that people often say. After 6: 00 am, 9: 00 am and 4: 00 pm, it is the best exercise time for teenagers to do fitness exercises and promote learning efficiency. The amount of exercise can be controlled according to one's psychological and physiological state at that time. If you reverse the order of movement. Disrupting the "biological clock" will make endocrine and life rhythm uncoordinated, which is not conducive to healthy development and study and life.
5. Environmental sanitation is not suitable.
Quiet and elegant sports environment is a good condition for the human body to get rid of the old and welcome the new during exercise. If you don't pay attention to exercise conditions and health, it will bring harm to your health, such as exercising in hard places such as cement roads and inhaling a variety of chemicals mixed in fog. It is easy to cause respiratory diseases and ocular keratitis; Exercise in dusty and turbid air will hinder the gas exchange in alveoli and cause insufficient oxygen supply to the human body.
6. Emergency parking is not advisable.
Poor self-control ability is one of the main shortcomings of teenagers in fitness. Some people do not do warm-up activities before exercise, while others do not do finishing activities after strenuous exercise. Even when they sweat profusely after exercise, they immediately run into the room to eat or study. The former is easy to cause muscle and joint strain and sprain, and cause abdominal pain. The latter will be dizzy, vomiting and even fainting due to cerebral ischemia. In addition, strenuous exercise for half an hour before and after meals hinders digestion.