Many people like swimming very much in summer, but swimming is very difficult for beginners. Beginners are easy to have fear because of choking water. What are the skills of swimming for breath? Do you know the taboos of swimming in summer?
What are the swimming ventilation techniques
The benefits of swimming are obvious. People who often take part in swimming have large lung capacity, relatively strong body, and stronger immunity to foreign diseases than ordinary people. So for those who can't swim, or those who can only put candles in the swimming pool, will they envy, envy and hate others when they see others in the swimming pool?
Before we start to learn swimming, we can do immersion exercises first -- in shallow water, bend over and immerse our head in water, count silently, and see how long we can hold on. In this way, if you practice repeatedly for a period of time, you will no longer be afraid of soaking your head, and the time of holding your breath will be gradually extended.
There are two kinds of floats, i.e. upwardness and upwardness. The first thing to learn is upwardness - face down and back up to the sky. The primary role of learning to float is to understand the nature of water. The human body can float in the water, but beginners lack of experience. So if you can't get to the ground and your head goes into the water, you will panic immediately - this is exactly the big taboo of the drowner!
Another function of learning to float is to practice balance. You can see in the water that those who swim well have basically flat bodies, like a horizontal sliding torpedo. For those who swim slowly, their bodies are almost all tilted, and their toes almost touch the bottom of the pool. One of the main reasons for this is that they always try to keep their heads up. The human head is very heavy. As soon as the head comes out of the water, the weight of the body will be greater. With the head up, the body will naturally sink.
What are the taboos of swimming in summer?
1、 Avoid swimming before meals and after meals: swimming on an empty stomach will affect appetite and digestive function, and will also cause dizziness, fatigue and other accidents in swimming; swimming on a full stomach will also affect digestive function, and will cause stomach spasm, even vomiting and abdominal pain.
2、 Avoid swimming after strenuous exercise: swimming immediately after strenuous exercise will aggravate the burden on the heart; the sharp drop of body temperature will weaken the resistance, cause cold, pharyngitis, etc.
3、 Avoid menstrual swimming: during menstrual swimming, germs are easy to enter the uterus, fallopian tubes and other places, causing infection, resulting in irregular menstruation, excessive menstruation and prolonged menstruation.
4、 Avoid long time exposure swimming: long time exposure will produce sunburn, or cause acute dermatitis, also known as sunburn. In order to prevent sunburn, it is better to use an umbrella to shade the sun after landing, or to rest in a shady place, or to protect the skin with a bath towel, or to apply sunscreen to the naked part of the body.
5、 Do not eat immediately after swimming: after swimming, you should rest for a while before eating, otherwise it will suddenly increase the burden of gastrointestinal tract, which is easy to cause gastrointestinal diseases for a long time.
6、 Avoid swimming too long: the skin generally has three reaction periods to cold stimulation. The first stage: after entering the water, the skin vessels contract due to cold stimulation, and the skin color is pale. The second stage: after staying in water for a certain period of time, the blood flow on the body surface expands, the skin changes from pale to light red, and the body changes from cold to warm. The third stage: stay too long, the body temperature is more than the heat, the skin appears goosebumps and chills. This is the taboo period of summer tour. You should get out of the water in time. Generally, the duration of swimming should not exceed 1.5-2 hours.
7、 Avoid swimming with epileptic history: no matter big attack or small attack, there is a moment of consciousness out of control during the attack. If it is suddenly induced in swimming, it will inevitably be "disaster of extinction".
8、 Avoid swimming with otitis media: no matter chronic or acute otitis media, water entering into the inflamed middle ear will make the disease worse, even intracranial infection.
9、 Avoid acute conjunctivitis swimming: the virus, especially in swimming pools, infects surprisingly fast and widely. Even healthy people should avoid swimming in the swimming pool during the epidemic season.
10、 Swimming after abstaining from alcohol: hypoglycemia occurs when a large amount of glucose stored in the body is consumed after drinking. In addition, alcohol can inhibit the normal physiological function of the liver, hinder the transformation and storage of glucose in the body, thus causing accidents.
11、 Avoid neglecting the hygiene after swimming: after swimming, wipe off the scale on your body with a soft dry towel, drip chloromycete or boric acid eyedrops, and blow out the nasal secretion. If there is water in the ear, you can use the "same side jump" to drain the water. After that, do some relaxation gymnastics and body massage or take a rest under the sun for 15-20 minutes to avoid muscle group rigidity and fatigue.