The reason for swimming tanning is continuous exposure.
Generally choose to swim in the afternoon when the sun is strong. At this time, your body is extremely hot, and soaking in water will make people feel extremely comfortable. However, the strong sun will definitely make you black. If you were on the ground, you would have found a place to shade yourself, but the cold water temperature in the swimming pool made you less sensitive to the sun and you couldn't feel it for half a day. When you find it is dark, it is too late to regret it.
Sunlight refraction
When we walk in the sun, ultraviolet rays will make us black, but after all, there is only one sun, and it can only reach some parts of the body. But in the water, the situation is different. The constantly fluctuating water surface refracts sunlight to every corner, allowing you to enjoy the sunshine continuously without dead ends. Even the light is stronger than the bottom, so it naturally gets dark quickly.
Exercise-induced
In daily life, we will see some bodybuilders and bodybuilders from the news. Their bulging muscles are enviable, and their devil-like bodies are amazing, but everyone ignores one problem: they are all so dark. In fact, these bodybuilders also exercise indoors every day. Why is it so dark? Because the human body will secrete a substance called phenol nitrosamine when exercising, it will make the body gradually turn black, and you are also exercising when swimming, so there is a reason for turning black.
Swimming fitness taboo 1. 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.
Second, avoid swimming after strenuous exercise.
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.
Third, 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.
Fourth, 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.
5. 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.
6. Avoid swimming without warm-up activities.
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.
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 will easily lead to gastrointestinal diseases after a long time.
Eight, 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 speaking, the swimming time should not exceed 1.5 to 2 hours.
Nine, avoid people with a history of epilepsy swimming.
Whether it is a big attack or a small attack, it is a sudden loss of consciousness during the attack. If it is induced suddenly in swimming, is it inevitable? Catastrophe? .
Ten, hypertensive patients avoid swimming.
Especially intractable hypertension, drugs are difficult to control, and swimming has the potential risk of inducing stroke, which should be absolutely avoided.
Cleaning method of swimming pool after swimming 1. Don't forget to brush your teeth and gargle after swimming.
When people swim, the pool water often enters the mouth, and some germs follow. If you don't clean your mouth in time before eating after swimming, these germs will enter the gastrointestinal tract, and people with poor resistance will easily become victims.
2. Wash your skin carefully after swimming.
After swimming, germs are easy to remain on the skin, and swimming pools are often disinfected with chlorine-containing preparations, which is easy to irritate the skin. Therefore, it is best to take a bath with nourishing shower gel after swimming, and it is best to apply moisturizing lotion after bathing.
Don't wash your hair too hastily after swimming.