Swimming immediately after strenuous exercise will increase the burden on the heart; A sudden drop in body temperature will weaken resistance and cause colds, pharyngitis and so on.
2. Avoid swimming in the sun for a long time.
Prolonged exposure can lead to sunburn or acute dermatitis, also known as sunburn. In order to prevent sunburn, it is best to use an umbrella to shade the sun after landing, or rest in a cool place, or use a bath towel to protect the skin, or apply sunscreen to exposed parts of the body.
3. Avoid swimming unprepared.
The water temperature is usually lower than the body temperature. Therefore, warm-up activities must be done before entering the water, otherwise it will easily lead to physical discomfort.
4. Avoid eating immediately after swimming.
It is advisable to rest for a while before eating after swimming, otherwise it will suddenly increase the burden on the gastrointestinal tract, which will easily lead to gastrointestinal diseases after a long time.
5. Avoid swimming for too long
Skin generally has three reaction periods to cold stimulation. The first stage: after entering the water, stimulated by cold, the skin blood vessels contract and the skin color is pale. The second stage: after staying in the water for a certain period of time, the blood flow on the body surface expands, the skin turns from pale to reddish, and the skin turns from cold to warm. The third stage: the stay time is too long, the heat dissipation of body temperature is greater than fever, and the skin has goose bumps and chills. This is a taboo period for summer outing, so leave the water in time. Generally, the swimming time should not exceed 1.5~2 hours.
6. Avoid swimming before and after meals
Swimming on an empty stomach will affect appetite and digestive function, and there will be accidents such as dizziness and fatigue during swimming. Swimming with a full stomach will also affect the digestive function, and it will also cause stomach cramps and even vomiting and abdominal pain.
7, avoid swimming during menstruation
Swimming during menstruation, germs easily enter the uterus, fallopian tubes and other places, causing infection, leading to irregular menstruation, excessive menstruation and prolonged menstruation.
8. Avoid swimming in unfamiliar waters.
When swimming in natural waters, don't jump into the water. Under complicated circumstances, it is not advisable to swim around the water surface and underwater to avoid accidents.
9. Avoid swimming on an empty stomach
Many people who like swimming have a feeling that after swimming ashore, they will feel hungry and weak. This is because swimming is a heavy physical exercise, with a large amount of muscle activity in the limbs, which will consume a lot of energy and calories. If we go swimming on an empty stomach, it will cause hypoglycemia, especially for diabetics, and the risk of hypoglycemia coma is greater. If swimmers are hungry, their blood sugar is too low and they consume a lot of energy, they are particularly prone to muscle trembling, dizziness, collapse, coma and even direct drowning. Therefore, swimmers should properly supplement some fruits, milk, candy and other foods before swimming, and then swim in the water.
10, avoid drinking and swimming.
Many people who like swimming, after drinking with friends, go swimming to cool off, regardless of their own lives. In fact, this is an extremely dangerous way, because after drinking, alcohol will stimulate people's brains, leading to blurred consciousness and uncontrolled actions. If they can't control their behavior after entering the water, it is likely to lead to extremely serious adverse consequences. In addition, people will consume a lot of glucose after drinking, especially after drinking a lot, which may lead to hypoglycemia and increase the chance of swimming accidents.