1, avoid swimming in a hungry or fasting state.

Many people will feel hungry after swimming, because the muscles of limbs move in a wide range during swimming, which consumes a lot of energy and calories. Therefore, before going swimming, you must supplement appropriate food. In the choice of food, it is mainly digestible, but it must have a certain amount of calories, preferably containing more fat and vitamin A, so as to keep the body temperature.

Because fasting can easily lead to hypoglycemia, muscle trembling, dizziness, collapse, coma and even drowning may occur during swimming.

2. Avoid swimming after a full meal

Swimming consumes a lot of energy, and some people choose to have a full meal before swimming. As we all know, after eating, the stomach is still in the digestive stage, and a lot of blood circulation is in the stomach. If swimming in the water at this time will lead to poor blood circulation in the limbs, then the blood supply in the stomach will be insufficient, which will directly affect the digestive function of the stomach and even cause stomach cramps, vomiting and abdominal pain.

3. Avoid drinking and swimming.

Drinking alcohol will consume a lot of glucose in the human body, which will cause hypoglycemia. When swimming in the water, symptoms such as dizziness may occur. Moreover, alcohol can paralyze people's thinking, and swimming after drinking may have extremely serious consequences.

Second, warm-up activities before swimming

Preparation before swimming into the water is extremely important. Warm-up activities can improve the functions of cardiovascular system and respiratory system, and accelerate blood circulation and substance metabolism. Warm-up activities can also improve the working ability of the sports system, increase muscle elasticity and strength, and expand the range of joint activities.

This has a great effect on preventing swimming injury and avoiding physical discomfort after entering the water. The content and amount of warm-up activities should be selected according to different swimming postures. The basic principle is to fully exercise all the muscles and joints involved in the activity, and the amount of activity should not be too large. Before entering the water, you need to wipe your body with cold water to adapt your body to the stimulation of cold water.

Extended data:

Precautions after swimming:

1, avoid eating immediately.

Under normal circumstances, it is more reasonable to eat after swimming for 40 minutes. Because the limbs exercise violently when swimming, the muscles need a lot of nutrition after swimming. At this time, the blood in the body will flow to the muscles of the limbs, and the blood in the stomach will be insufficient. If eaten immediately, it will lead to indigestion or gastrointestinal diseases.

2. The food choice is biased.

People should replenish energy and water after swimming. The main sources of energy are carbohydrates and high-quality protein. So after swimming, you can choose rice, steamed bread, noodles and other fruits as the staple food, or you can choose apples, bananas, pears and other fruits to eat together. These fruits help to increase the glycogen reserves in the body and ensure that the body has sufficient energy reserves.

In addition, excessive sweating during swimming can lead to dehydration. Therefore, you can drink some sports drinks after swimming. At the same time, moderate consumption of cold drinks, not partial eclipse of cold things.

People's Network-Pay attention to eating on an empty stomach before and after swimming, and don't swim after drinking.

People's Daily Online-Swimming Tips: Be sure to warm up before swimming.