Learn these swimming knowledge to increase a sense of security.

Citizens are swimming in the swimming pool. Photo courtesy of the interviewed unit

Swimming attracts Shenzhen citizens to participate. Photo courtesy of the respondents In the hot summer, swimming is one of the favorite ways for citizens to cool off. There are many swimmers in Shenzhen, and the swimming pool is always very lively on holidays. However, there are many safety details that need to be paid attention to during swimming. Shenzhen Water Sports Association’s scientific fitness guide for swimming can increase your sense of security while exercising.

Common sense of swimming safety and hygiene

(1) establish the idea of safety first. Exercise in the water, to ensure safety first; Should be organized, or three or five people go together; Learn basic swimming life-saving skills to lay the foundation for self-help and rescue.

(2) Choose a safe and hygienic place. Standardized swimming venues are fully equipped with qualified lifeguards, swimming life-saving equipment and facilities are complete, safety signs are clear and eye-catching, and the water quality of the pool meets national standards; When swimming in natural waters, you should choose a natural swimming place with flat beach, good water quality, no rapids and eddies, small waves, life-saving personnel and complete facilities.

(3) You can’t swim in these situations. Drinking alcohol can stimulate the central nervous system to be in an excessively excited or inhibited state, and swimming after drinking is prone to drowning accidents; Swimming after satiety is easy to cause stomach cramps, while swimming when hungry is easy to cause dizziness or limb weakness; Swimming immediately when you are overtired will cause fatigue accumulation and easily cause cramps.

How to save yourself in the water

(1) Ways to relieve muscle spasm. The common method is to stretch the spasmodic muscle groups. For example, when the finger muscle spasms, you can make a fist and then straighten it hard; When the toes are cramped, the toes can be flexed and extended to the maximum extent; When the muscles at the back of the calf are spasmodic, hold down the knee joint of the leg with one hand, and grab the toes of the leg with the other hand to stretch in the opposite direction; When the muscles in front of the thigh are convulsed, float on the water or go ashore as soon as possible, lie prone by the pool and bend the calf, and grasp the cramped leg, ankle and wrist with the same hand to fold the calf.

(2) Prevention and treatment of water choking. The way to avoid choking is to practice breathing techniques more, try not to inhale through the nose, but to inhale through the mouth and exhale with the mouth and nose. If you accidentally choke on water, you should try to stay calm. You can make your body step on water or float on your back, make your head out of the water, adjust your breathing quickly, or cough hard and spit out the water in your trachea. If you still feel unwell, you need to go ashore to rest and adjust in time. (Lin Weihang)

Source: Shenzhen Evening News

Summary of the 2018 World Cup: The world football situation is changing, and China football needs to catch up bravely.

  Xinhua News Agency, Moscow, July 15th (Reporter Liu Ning Su Bin) On the 15th, in a downpour, the French team once again held the World Cup high, and the curtain fell on 2018 fifa world cup. France, Belgium, England and other powerful teams have blown up a youth storm, which has impacted the old world football pattern. Facing the ever-changing world football, China football needs to catch up courageously and realize its dream of stepping on the World Cup again as soon as possible.

  Youth storm "funeral"

  Today’s world football is experiencing the replacement of players. Mbappé, the 19-year-old French team who won the Best Rookie Award in this World Cup, won the Golden Boot Award with six goals, and a group of young players, such as Kane, the English captain who is about to turn 25, and Lu Kaku, the Belgian team, who is 25, shine brightly in the World Cup. The post-90s players began to "grab the class and seize the power", the post-80s players gradually withdrew from the stage, and the post-70s players finished their curtain call performance.

  When I set foot on the Russian arena, the average age of the "Gaul Rooster" team was 26 years and 10 days. In the final, it defeated Croatia 4-2 and held the World Cup high again. France, which won the World Cup in 1998, became the second youngest team to win the World Cup after Brazil, which won the World Cup in 1970 (with an average age of 25 years and 5 days).

  Under the impact of the youth storm, faced with more concise and practical techniques and tactics, the traditional strong teams have been overwhelmed, the defending champion Germany stopped the group stage, the last runner-up Argentina was out of the top 16, the 2010 World Cup champion Spain also failed to advance to the top 8, and the "five-star Brazil" was pulled down by the Belgian team in the quarter-finals.

  On the other hand, the weak brigade without strong generals, relying on the tacit cooperation between players, has kicked out the wonderful things that belong to themselves and also belong to the World Cup. The first round of Iceland’s first World Cup group match drew Argentina 1-1; Also in the group stage, even though Panama lost to England by a big score, it still dared to show its sword and scored the team’s first goal in the World Cup.

  Europe is the only one in Asia.

  Today’s world football pattern is changing, with European football continuing to lead, South American football closely following, and Asian and African football trying to catch up.

  After the group match, among the top 16, there are 10 teams in Europe, 4 teams in South America, Mexico as the only fire in North Central America and the Caribbean, 5 teams in Asia, only Japan, and 5 teams in Africa.

  With the faster competition and stronger confrontation, the differences between players’ individual abilities are narrowing, and the gap between strong teams is also narrowing. In the round of 16, Russia eliminated Spain, Croatia defeated Denmark, and England won Colombia, all of which went through overtime and finally decided the outcome through a cruel penalty shootout. Croatia also staged a penalty shootout in the quarter-finals, narrowly beating Russia. In the semi-final, Croatia suffered its third overtime in this tournament and sent England home 2-1.

  In this World Cup, although Asian football as a whole has not made a breakthrough, its performance is still remarkable. South Korea beat defending champion Germany 2-0 in the final group match, which was a big surprise. After winning a 2-0 lead against Belgium in the round of 16, Japan still fought against its opponents. Although it lost 2-3 in the end, it won respect for its courage to challenge and struggle. In addition, the Iranian team drew the 2016 European Championship champion Portugal in the group stage, and the Saudi team also won a victory in the final group stage.

  After the round of 16, six European teams advanced. Next, with Uruguay and Brazil, the only teams left in South America, going out one after another, the top four seats were all occupied by European teams, and the World Cup turned into the "European Cup".

  In the third place battle, Belgium beat England 2-0 and got the best result in the team’s history. Previously, the best result of "European Red Devils" was the fourth place in 1986.

  Although it failed to achieve its desire to win the championship, the Croatian team, which won the runner-up, also achieved the best result in history, and modric, the core of the team, won the Golden Globe Award.

  VAR is eye-catching and "the hand of God" is hard to reproduce.

  Today’s world football is in an era of change. The application of new technology makes the game more fair. The VAR (Video Referee Assistant) used in the World Cup makes it difficult for Diego Maradona’s "Hand of God" to reappear.

  The biggest change in this World Cup is the introduction of VAR. Thanks to the intervention of scientific and technological means, every moment in the game can be recorded in a panoramic view. With VAR as a guarantee, referees can not only hold a more open attitude towards the scale of players’ physical confrontation, but also greatly reduce the possibility of missing and misjudging.

  However, some football people who have reservations believe that the use of VAR disrupts the rhythm of the game and reduces the suspense and charm of football.

  "The penalty is fair, but the question is who decides the game. Is it the referee on the lawn or the person in the’ little black room’? VAR will make football lose its charm. " After the match between Australia and Denmark, Danish coach Hareide, who suffered a loss, had no objection to the penalty awarded by the video assistant, but he still couldn’t help but say something.

  According to the statistics of FIFA, in the first 62 matches, the judges watched 19 VAR replays and corrected 16 incorrect judgments.

  FIFA President infantino said on 13th that the use of VAR improved the referee’s penalty accuracy from 95% to 99.2%, "16 penalties were changed, and 16 wrong decisions became 16 correct decisions".

  In the final on 15th, VAR once again became the focus on the field. The referee turned to VAR in the first half and awarded the French team a penalty. With this penalty, the "Gaul Rooster", who won a 2-1 lead, then took control of the situation on the field and finally won the championship with 4-2.

  Russia handed in satisfactory answer sheet, FIFA president praised it

  The curtain of the World Cup in Russia fell, and 64 games went smoothly. Russia fulfilled the goal of "showing a new and enthusiastic Russia to the world" when bidding for the World Cup in 2010.

  Russia’s promotion to the quarter-finals inspired the whole of Russia. According to a poll data released by the All-Russian Social Public Opinion Research Center, a Russian polling agency, on the 12th, the performance of the Russian football team in this World Cup made the Russian people feel proud, happy and respected.

  Hosting the World Cup has benefited Russia a lot economically. Devall Covic, Chairman of the Organizing Committee of the World Cup in Russia, said that the comprehensive benefits of the World Cup for Russia are expected to reach 15 billion US dollars.

  The World Cup has also become a window for the world to know about Russia, where fans from all countries (regions) gather together. FIFA President infantino said: "The Russian World Cup is the best in history. The World Cup has changed the world’s view of Russia, and every fan has experienced the enthusiasm of Russians. "

  China element shines in the World Cup, China football needs to catch up bravely.

  Although China was a flash in the pan in the 2002 World Cup, the element of China was never absent. From China manufacturing to China enterprises and China brands, and then to China service, China elements once again shine in the World Cup.

  Come to Russia, "Made in China" can be seen everywhere. China enterprises have made all-out efforts to become a decisive force in the FIFA sponsors’ phalanx. Wanda Group has become a global partner with seven companies including Coca-Cola, Adidas and Hyundai Motor. Mengniu, VIVO and Hisense, together with McDonald’s and Budweiser Beer, became sponsors of the World Cup; Enterprises such as Yadea, Zhi Yi Jing and Di Pai are regional sponsors.

  Inside and outside the Russian World Cup, there are more and more elements of China. However, it is regrettable that China failed to appear in this World Cup. After all, the team is the real protagonist of this world football feast.

  In the face of the ever-changing world football, China football needs to continue to reform, learn the advanced techniques and tactics of world football with an open mind, and "please come in and go out". It is very important to grasp the youth training, lay a good foundation, work hard, make contributions for a long time, and March forward courageously along the road suitable for their own development, so that China’s dream of stepping on the World Cup again will not be far away.