People who swim for a long time will receive these four ＂surprises＂. Do you know which one？

The summer solstice has just passed, and many places are "surrounded" by high temperature. How to cool off the heat has become a topic that everyone talks about after dinner.

When it comes to cooling off summer heat, many people will choose swimming besides eating iced watermelons and ice cream and hiding in air-conditioned rooms.

Swimming is not only cool, but also helpful to health, but swimming incorrectly may also cause "trouble".

So, what benefits can swimming bring? What should I pay attention to when I swim?

1. Enhance cardiopulmonary function

The British "International Journal of Water Sports Research and Education" has clearly pointed out that swimming is rightEnhance human heart and lung functionIt has positive significance.

Because when swimming, the friction of water on the human body will strengthen the heart.Blood reflux velocityAt the same time, increase the heart and brainBlood transfusion volumeIt can prevent and even treat cardiovascular and cerebrovascular diseases.

Step 2 lose weight and shape

When swimming, the resistance in water is in the air.12 timesIt takes great physical strength to overcome it.

In this process, the excess in the bodyFat and glycogenWill be consumed and eventually play a rolelose weightThe purpose.

At the same time, swimming asSystemic exerciseLong-term persistence can also achieve the effect of shaping.

Step 3 reduce asthma

Swimming is good for improving the nervous system.Thermoregulation functionEnhance the adaptability of the human body to cold and hot changes, especially children, after swimming often.Physical fitness and disease resistance of organismWill be improved and reduce the onset of asthma.

4. Joint protection and lumbar protection

The weight of people in water is only one-eighth of that on land, so there is basically no load on the joints when swimming, which also helpsEnhance bone mineral densitySo swimming can not only make the body fully active, but alsoWill not hurt the joints..

In addition, the buoyancy generated in the water makes the human spine horizontal, which canReduce the burden on the spine, reduce the pressure on the neck and lumbar spine, there areLumbar protectionThe role of.

Swimming has always been regarded as a sport suitable for all ages, but we should still pay attention to safety during swimming, especially to prevent these three diseases.

First, sudden deathThe swimming intensity is too high, which exceeds the heart load. At this time,Cardiac insufficiencySudden death may occur. The doctor suggested,Overtime, physical exhaustionPeople had better not go swimming.

In addition,Variation of water temperatureExtremely easy to causeSevere contraction of blood vesselsAnd increase the incidence of sudden death, so in addition to fully warming up before swimming, we should also pay attention.After getting used to the water temperature.Swimming again.

Second, vaginitisThe swimming pool is a public place. If women swim in an unclean swimming pool, they may get infected with bacteria.Reduce the mechanism of vaginal anti-bacteriaAnd cause vaginitis problems.

Advise women toRegular swimming poolSwimming, and want toStaggered menstrual periodAt the same time, avoid direct contact with the ground.

Third, molluscum contagiosumThe water monkey is an infectious skin disease. Because of the large number of people in the swimming pool, if disinfection is not thorough, a large number of germs may breed and cross-infect.

Swimming is good, but some people try not to swim.

• Patients with heart disease, including congenital heart disease, untreated coronary heart disease, viral myocarditis and so on. This kind of patient swims vigorously and may appear.Insufficient oxygen and blood supply to the heartProblem, very easy.arrhythmiaAnd even sudden death.
• Patients with emphysema (chronic bronchitis). When swimming, the water pressure will increase the pressure on the chest and abdomen, leading to the appearance of patients.Dyspnea, hypoxiaIsopulmonary dysfunction.
• Ear disease patient. When swimming, water will enter the human ear canal or bring in a lot of bacteria, which will aggravate ear diseases.
• epileptic. In the process of swimming, it is very dangerous if epilepsy suddenly occurs.

• Red eye patient. Pink eye disease is caused by bacterial infection and can spread quickly in water.
• Dermatological patient. Including all kindsTinea, allergic dermatosisAnd so on, may aggravate their own condition at the same time, the disease will be transmitted to others.
• Menstrual women. During menstruation, bacteria are more likely to enter women’s uterus and cause infection problems, which in turn leads to women.Irregular menstruation, vaginitis and other problems.

Before swimming, you should do it wellAdequate warm-up exercise, helpImprove the excitability of the nervous systemAnd let the organs enter a state of movement to prevent palpitation, dizziness, shortness of breath and other phenomena after entering the water, andIncrease the range of joint motionAvoid cramps or joint injuries during swimming.

Second, rememberDon’t swim on an empty stomach, there may be physical exhaustion, causing accidents.

In addition,Swim immediately after strenuous exercise.It is also taboo, because the swimming heart load will increase infinitely at this time, and the body temperature will plummet, which maycatch coldIn addition, it can also cause severe contraction of blood vessels, leading toSudden death.

It is also very important that we shouldChoose places with more people.Swimming, especiallyOld people, beginners and children., should put an end to swimming alone, it is best to swim together with family and friends.

Swimming can not only cool down and relieve summer heat, but also exercise, which has many benefits. However, before swimming, we must make adequate preparations and exercise, and at the same time pay attention to the swimming time should not be too long.

References:

[1] You don’t know so many benefits of swimming? ".People’s Network-Popular Science China. 2016-10-10

[2] Prevention of Sudden Death in Swimming Season. Health Times.2016-05-05

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