What should you pay attention to before swimming?

The weather is hot in the summer, and many sports will make people sweat a lot and feel uncomfortable. Therefore, many friends like to exercise by swimming in the summer. When doing activities in the water, they will not only feel cool, but also have a certain effect of enhancing the body's immune ability. However, there are some things you should pay attention to before swimming. Let us learn about some taboos when swimming.

1. Avoid swimming before or after meals: Swimming on an empty stomach will affect appetite and digestive function, and may also cause unexpected situations such as dizziness and fatigue during swimming; swimming on a full stomach will also affect digestive function, and may also cause stomach cramps, and even vomiting and abdominal pain.

2. Avoid swimming after strenuous exercise: Swimming immediately after strenuous exercise will increase the burden on the heart; the sudden drop in body temperature will weaken resistance and cause colds, pharyngitis, etc.

3. Avoid swimming during menstruation: Swimming during menstruation may cause bacteria to enter the uterus, fallopian tubes, etc., causing infection, leading to irregular menstruation, excessive menstrual flow, and prolonged menstruation.

4. Avoid swimming in unfamiliar waters: When swimming in natural waters, avoid entering the water rashly. It is not advisable to swim in waters where the conditions around and under the water are complicated to avoid accidents.

5. Avoid prolonged exposure to the sun and swimming: Prolonged exposure to the sun will cause sun spots or acute dermatitis, also known as sunburn. To prevent sunburn, it is best to use an umbrella to block the sun after going ashore, or rest in the shade of a tree, or use a bath towel to protect your skin, or apply sunscreen to exposed parts of the body.

6. Avoid swimming without doing warm-up exercises: The water temperature is usually lower than body temperature. Therefore, you must do warm-up exercises before going into the water, otherwise it will easily lead to physical discomfort.

7. 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 may easily cause gastrointestinal diseases over time.

8. Avoid swimming for too long: the skin generally has three reaction periods to cold stimulation. Phase 1: After entering the water, the skin’s blood vessels contract due to the stimulation of cold, and the skin color becomes pale. Phase 2: After staying in water for a certain period of time, the blood flow on the body surface expands, the skin turns from pale to light red, and the skin turns from cold to warm. The third stage: staying too long, the body temperature dissipates more than the heat generated, and goose bumps and chills appear on the skin. This is a taboo period for summer swimming, and you should get out of the water in time. Swimming should generally not last more than 1.5 to 2 hours.

When you go swimming, you should do some warm-up exercises beforehand. In order to effectively prevent cramps, it is best to pour some swimming pool water on parts of your body before you go swimming, so that your body can adapt to the water. When cramps occur, you should take some effective first aid measures in time.