crawl stroke

1850, Australian Willis's forward stroke with both hands on the water can be regarded as the prototype of crawl. Later, John Trajan, a British swimmer, adopted the swimming style of crawling forward alternately with his chest, legs and hands in 1873. Later, Richard Carr, an Australian, created a' shallow water' kick based on the swimming styles of Trajan and Alex Wyham. Since then, the kicking of the legs has only changed a little. There are many forms of perfect cooperation in crawl. Generally speaking, it is common to draw water twice, draw water six times and breathe 1 time.

Breaststroke: this is the first swimming style as a competition, and freestyle and butterfly are also developed from it. In the sixties and sixties of last century, many Japanese swimmers took advantage of loopholes in laws and regulations to dive in long-distance races, thus gaining benefits. In the 1960s and 1960s, the swimming rules were changed, and swimmers were only allowed to paddle and kick underwater once after taking off, that is, after changing pools. In order to reduce the water resistance and strengthen the propulsion, there have been many reforms in the stroke and kick movements of chest swimming, but the basic swimming strokes are not much different.

Freestyle: Also called "crawl". 1850 Australian swimmer Willis uses a stroke in which his hands move forward on the water, which can be regarded as the prototype of butterfly stroke. John Trajan, an English swimmer, adopted a swimming style in 1873. He crawled forward alternately with his chest, legs and hands.

Backstroke: The early backstroke just floated on the water and then was pushed by the kick of breaststroke. In the Olympic Games of 1900, swimmers began to use the swimming style of moving forward with both hands on the water, and the kicking style of stepping did not appear until the Olympic Games of 19 12.

Butterfly: The butterfly stroke was first used by German swimmer erich Rademacher in the breaststroke competition of 1926. At that time, he also used the breaststroke kick method. 1952 After the Olympic Games, FINA decided to separate this swimming style from the chest stroke, so butterfly stroke was added, and swimmers could use dolphin kick.

Extended data

Matters needing attention

1, we should adhere to daily adaptation and step by step.

Don't swim too far at first. If you are physically strong, you can consider swimming back and forth near the starting point. After a long swim, 1000 meters, 2,000 meters and 3,000 meters are fine. But this long distance is not achieved overnight, but the cumulative effect of persistence and perseverance every day. Only by adapting every day can we persist. Distance is not a problem. On the contrary, there may be some discomfort and security risks.

2. Be sure to take good followers and be prepared.

When encountering sudden accidents such as cramps and syncope, followers can not only find conspicuous targets for rescue, but also provide convenience for swimmers' rescue and increase a safety guarantee. Therefore, taking a good follower when swimming is not only responsible for yourself, but also for others, which is beneficial to people and self-interest.

3. Travel together and care about each other.

The process of swimming is also the process of making friends together and establishing friendship. When swimming outdoors, try to swim together and look after each other. Especially after swimming, if you are not particularly anxious, you might as well wait for the last swimmer to go ashore. The friendship established in this way can be called "the friendship between life and death", which can not only increase the fun of swimming, but also reduce the occurrence of safety accidents.