Health preservation refers to a medical activity to support life, enhance physical fitness and prevent diseases through various methods, so as to achieve longevity. The so-called life is life, survival and growth; The so-called maintenance means maintenance, recuperation and nourishing. In a word, keeping in good health is to maintain life.

Summer health

Summer is always considered as the best time, so it is necessary to master some knowledge of summer health care.

1. Drink more boiled water.

All kinds of drinks, such as soda, fruit juice and cola, contain more sugar and electrolyte. Excessive intake is not only bad for children's dental development, but also affects their appetite and digestive function, resulting in overweight and obesity. From the point of view of nutrition, boiled water is the most beneficial to health. Boiled water can be metabolized immediately after entering the human body, which has the functions of regulating body temperature, transporting nutrition and cleaning toxins in the body.

2. Pay attention to a balanced diet.

In summer, the human body needs more nutrition, and it is necessary to supplement fresh fish, fresh meat, fresh eggs and pig liver. Or use high-protein foods such as tofu, milk, fruits and vegetables instead of meat. In addition, you can't eat less grain.

3. The nap time should not be too long

According to physiological research, people's sleep can be divided into two stages: shallow sleep and deep sleep. Usually, after 80 ~ 100 minutes of sleep, people gradually change from light sleep to deep sleep. In the process of deep sleep, the inhibition process of brain center is obviously strengthened, many capillary networks in brain tissue are temporarily closed, cerebral blood flow is reduced, and the metabolic level of the body is obviously reduced. If you suddenly wake up in a deep sleep, you will have a strong sense of discomfort.

4. It is not advisable to take a cold shower after sweating.

It is easy to sweat in summer. You can't take a cold bath when you sweat. If cold water is used after sweating, the pores of the whole body will close quickly, and the heat cannot be distributed and stored in the body, which will affect the body function. Some cold viruses will take advantage of this. Experts suggest that a better way to cool down is to take a warm bath half an hour after exercise, which is more conducive to regulating body temperature and relaxing the whole body muscle tissue.