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Backstroke, also known as backstroke.
It is a swimming position in which the human body lies supine in water. The backstroke includes the reverse breaststroke and the reverse crawl.
Because the face is on the water, it is easy to breathe, but swimmers can't see that they are swimming towards **, and it is easy to go in the wrong direction. The backstroke is the only position in which an athlete starts in the water, the others jump into the water.
One of the competitive swimming competitions. When swimming, the body is lying on its back, there is no regular restriction on arm and leg movements, and alternate strokes and alternate kicks are used to cooperate with the technique. In the early backstroke, the two arms stroke at the same time and the legs at the same time were combined with water, which was called the reverse breaststroke.
Due to the poor coordination effect and slower swimming speed, by the time of the Fifth Olympic Games in 1912, the Americans hHebner perfected his technique and succeeded in alternating strokes with his arms and kicks with his legs, so that the reverse breaststroke lost its meaning.
Backstroke is a posture of the human body lying on its back in the water for swimming, the birth and development of backstroke technology has a long history, there is a record of backstroke technique in 1794, but until the beginning of the 19th century, the two arms are still used to stroke backwards at the same time when swimming backstroke, and the two legs do the breaststroke kicking action, that is, the present"Reverse breaststroke" 。
Since the advent of crawling in 1902, some people have begun to use crawling-like swimmers with their arms in turns to stroke backwards because of their reasonable and fast crawling techniques. However, it was not until 1921 that the current backstroke technique was first developed.
The backstroke technique makes it easier to breathe because the head is exposed to the water; Lying on the water is more labor-saving. Therefore, it is very popular among middle-aged and elderly people and people with weak constitution.
In 1900, the second Olympic Games began to be an official event. The backstroke includes the reverse breaststroke and the crawling backstroke. The reverse breaststroke is the earliest type of backstroke, which is similar to the breaststroke and the body posture is reversed.
That is, the human body lies on the surface of the water, and the arms are paddled back from the back of the head through the body. The backstroke at the first few Olympics was held in the reverse breaststroke.
At the 5th Olympic Games in 1912, American athlete H. Heebner won the 100-meter backstroke championship with a score of 1 21 2 using the backstroke technique of taking turns with both arms and hitting the water up and down with both legs, showing the superiority of the climbing backstroke technique, while the reverse breaststroke gradually lost its significance in competition.
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We all call the dead man drifting in the backstroke, although it doesn't sound good, but it's quite decent!
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It can be compared to a boat, and the hands are.
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In fact, this question is very easy to explain, you can think of it this way, it is precisely because your question has a certain universality, so it is recommended that you go to Bilibili or other **** search for relevant tutorials, I believe you will find the answer you need soon, I hope mine is helpful to you, thank you.
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Backstroke is a common swimming style of Naiqing, and backstroke can exercise all aspects of the body. You need to swing your arms head-up. It is also necessary to master the necessary movement skills and breathing.
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Backstroke can make the body more coordinated, make your legs more powerful, and the sedan board Wang Yela will not let the water into his eyes and nose, and he needs to pay attention to maintaining a good posture, closed and good proprioception.
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It can burn fat during backstroke, promote metabolism, and build muscles; Be sure to keep your body balanced when backstroke.
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Benefits: 1. Enhance physical fitness. Strengthens resistance. Cool in summer and cold in winter.
2. Enhance heart and lung function.
3. Shape the body. Make the body fit, children swimming regularly is conducive to growing taller, thin people will become strong after swimming exercise (including body), obese people can swim properly ** (abdomen, buttocks).
4. Make the muscles strong.
5.It is good for the spine, especially for people suffering from spondylosis, when doing other exercises, due to the weight of the human body, the spine needs to bear a certain amount of pressure, and swimming is because of the buoyancy of the water, and the human body is like a lying position during exercise, so that the spine can move in a state of no heavy pressure, which is conducive to returning to its original position. Therefore, many doctors will recommend that patients with spondylosis participate in swimming appropriately to assist**.
6. Exercise the coordination, strength and flexibility of the limbs.
7. Training in an anaerobic way can increase muscles, and training in an aerobic way can burn fat, which serves the purpose of the best in life.
8.Regular swimming can effectively promote blood circulation in the waist and abdomen, and women with dysmenorrhea can make dysmenorrhea disappear by swimming regularly (except during menstruation).
9.Swimming breaststroke regularly enhances sexual function.
Disadvantages: 1. There is a possibility of otitis media. 2. There is a possibility of infectious diseases.
As long as it is a variety of ** diseases) too tight silicone swimming cap will damage the hair, and there are a lot of germs in the water, so you must pay attention to taking a shower in time after swimming, rinsing your mouth, and it is best to drop some eye drops if possible. In addition, it is necessary to prepare before entering the water, and warm-up exercises are indispensable to prevent sports injuries. Be safe when swimming, as the most serious consequence is drowning.
Suggestion: Go to a swimming pool with good water quality, do not swim during special periods.
Whether you're just learning to swim or a regular swimmer, you need to prepare some essential equipment:
Swimsuit: Swimsuit must fit. If it is too big, it is easy to swim in the water, which will increase the weight and resistance of the body, and affect the swimming movement.
Diving goggles: The water quality of some swimming pools is not clean, and bacteria can easily enter the eyes, resulting in pink eye, etc.; There are also sterilized pool water that contains bleaching powder, which can easily cause eye discomfort. In order to protect your eyes, you should wear diving goggles to swim, and beginner swimmers can also correct the problem of not being able to open your eyes in the water by wearing diving goggles.
Floating objects: Beginner swimmers should bring some floating objects, such as styrofoam water boards, lifebuoys, etc. Before entering the water, check the lifebuoy for air leakage to prevent accidents.
4), toothbrush; There are a lot of germs in the water, so you must pay attention to taking a bath in time after swimming, rinsing your mouth, and the best drip point if possible.
5) Eye drops.
6) Cotton swabs: There is a possibility of otitis media.
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Friends, first of all, I want to say that the biggest benefit of swimming is; 1. Exercising, swimming for people who have a little problem with the respiratory tract is one of the ways to solve the problem. 2. If you can keep swimming for 3-5 years, you will see a perfect body. (1-2 hours of swimming per day) backstroke is the least strenuous of the 4 swimming styles, and this is true.
If you were an athlete, you wouldn't say that. If you want to improve your speed in backstroke, your back strength must be strengthened, and it is not easy to practice your back strength.
There are definitely benefits to the boys' leg presses. Stretching your legs helps to improve the flexibility of your legs, relax your muscles and invigorate your blood. For how to press the leg, I recommend finding a place with a small difference in height, and one leg can be put on a high place and then bend over.
To summarize the disadvantages of blood donation that are hotly discussed on the Internet, it mainly focuses on the worry of contracting infectious diseases when donating blood, in fact, this is a completely unnecessary worry, because the needles and blood bags used in blood collection and supply institutions across the country are disposable medical consumables that have been strictly tested and qualified by the state, and there are strict operating procedures and requirements for blood collection.
You are right in this way, it is also good for your hands and feet to sweat easily, this is for sure, there are two sides to everything, benefits, 1, this shows that you are vigorous and bloody, and such people are usually not easy to gain weight. 2. The vascular nerves of the hands are more developed than those of ordinary people, and the hands and feet are more flexible, which is suitable for sports such as playing basketball. 3. If you really have qigong, this kind of person is more suitable for practice. Hehe.
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