Professor Tsinghua used physics to find the ＂problem＂ of the national football team.

　　Can be called "the first sport in the world", and the culture of football is profound.

　　According to Ge Weikun, a professor in Tsinghua University, this is exactly what China football lacks most.

　　At a speech meeting a few days ago, the old professor who studied physics unexpectedly talked about football and listed a lot of physical knowledge in football, which attracted the attention of many fans for a while.

　　As for China football, he once organized football matches for Chinese and foreign students overseas and led the team to win the championship. He put forward his own suggestions, "What we lack is football culture. Sending dozens of people out like the Jianlibao team can’t solve the problem. "

　　Physics professor studies football? You really have a doorway

　　As a senior physics professor in Tsinghua University, another identity of Ge Weikun is a fan.

　　It seems that the two fields have no intersection, but in fact they are inextricably linked.

　　As early as 2014, together with professors from other schools, he produced an open online video course called "Football and Science", and many people signed up for classes every year.

　　"Up to now, there are about 30,000 people who have participated." He told the The Paper reporter. At present, he is still working on compiling this video course into a book.

　　What made Professor Ge popular on the Internet was his knowledge of physics in football mentioned in a speech a few days ago, which was quite refreshing for fans who were used to tactical analysis.

　　And this knowledge comes from the courses he made before.

　　For example, why can Beckham’s banana ball "turn" the goal in a strange arc? In fact, it is because the rotating sphere is deflected by Magnus’ law in flight.

　　If you want to kick the "elevator ball" that suddenly falls, according to the parabola obtained by physical calculation, you need to make the ball have a high initial speed without rotating.

　　According to Ge Weikun, overseas, scholars have studied the science of football as early as ten years ago.

　　The relationship between the speed and angle of the interceptors in the middle of the interception, the average contact time of each person in a football match, the distance from the penalty to the goal and the goal rate … … All kinds of seemingly "unremarkable" data have actually been carefully studied.

　　Theory guides practice, and players can’t be "unlearned"

　　Perhaps in the eyes of fans, these academic football physics studies are not far from the actual playing — — After all, no one will measure the angle of the defender when passing the ball and then decide the passing strength.

　　But for players, these studies still have positive significance.

　　"In fact, the main purpose of (these studies) is to give a physical explanation of some phenomena in football, so as to give the technical essentials. When we understand the principle, we can know how to kick. " Ge Weikun said in an interview with The Paper.

　　"For example ‘ Elevator ball ’ , it is necessary to (let the ball) not turn, to have a high initial velocity, you need a strong calf strength. Kick ‘ Banana ball ’ , it is necessary to touch the ball on the inside of the foot to increase the friction time of the ball. Players are not required to know physics, but this is a scientific method. If the coach saw it, it should be helpful. "

　　In fact, for football, Professor Ge is really not "an armchair strategist".

　　Previously, he studied and taught overseas and lived for more than 20 years. In Britain, he played futsal with the local people, and in the United States and China, he organized a student football team to coach himself.

　　When he was in the United States, he participated in the organization of the first invitational tournament for Chinese and American student teams, and as a result, his team defeated Yale University 1-0 and won the championship.

　　In Ge Weikun’s view, football emphasizes teamwork and is definitely a sport that needs high IQ.

　　As for the cultural training of athletes, there is still room for improvement in China football.

　　"I think we may be right ‘ Football should start with dolls ’ This sentence is misunderstood, which does not mean that children should play football all the time. Coach Jin Zhiyang told me that 90% of the young players can’t enter the professional team, and they have no education and a bad future. In the end, parents dare not let their children play football, which leads to worse and worse football in China. "

　　"Japanese coach takeshi okada also said that China’s young players have insufficient cultural education and logical thinking ability. It’s ok to play football, but when you become a coach in the future, it will be insufficient, which will lead to worse teaching. "

　　Football in China is still "unhealthy".

　　Although he is over 70 years old, Ge Weikun is still full of interest in football. He is a professor of physics and a member of Tsinghua University Football Research Center. He can even try his hand on the football field.

　　Like all China fans, he is also looking forward to the rise of football in China, but he has no secret about the problem of football in China.

　　"Football should be a pyramid. It is not enough to look at the spire. Sending dozens of people out like the Jianlibao team can’t solve the problem. (Still depends on) the campus football that is widely carried out now. "

　　In the process of living overseas, he has seen the profundity of local football culture, and China football, as the Italian marshal Cannavaro said, lacks most not money, but football culture and tradition.

　　"For example, in Germany, football has become a part of their culture, just like their music. There are many old people singing very well near the church there. On weekends, I don’t know how many football matches there are. "

　　"In China, football clubs are the names of enterprises, while club names in Britain are place names with strong local awareness. For example, Manchester City, when they were not as powerful as they are now, still has a large number of diehard fans. (Fans) will not only look at the team’s achievements, but also support them even if they are relegated to the second, third and fourth leagues. "

　　Nowadays, many measures have been taken to popularize football culture in China, such as promoting campus football and social football, and increasing the number of stadium facilities. In Ge Weikun’s view, these are all positive signals.

　　However, at the moment, Professor Ge also said, "The commercial flavor of the Super League is too strong, and some of them are not healthy. Football should have a higher value than business. "