After crossing the finish line, Duke saw his championship time of 20.06 seconds and a wind speed of -0.9m/s, and he couldn't help but feel a little regretful. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

But he also knows that the wind speed is beyond human control, and for the eight competitors competing in the same field, everyone is playing fair under the same wind speed conditions, and the downwind or headwind, no wind or super wind speed will not make which player who starts at the same time have an additional advantage.

Does wind speed affect the 100-meter run and 200-meter run, and to what extent?

The answer is yes: it has an impact.

The speed at which an athlete can run forward at a given moment depends on the propulsion force they produce and the air resistance that hinders it, which in turn depends on the relative speed and wind speed of the athlete.

There is a well-known Australian track and field theory expert named Nick Linthorne, who derived the sprint wind speed-correction time formula based on a mathematical model to theoretically explain the effect of wind speed on sprint performance, which is:

△t=a（v-bv2）

In this formula, △t is the correction time, that is, the time affected by the wind speed, and v is the wind speed.

And, a = 0.056 (male), a = 0.067 (female), b = 0.05 = 1/2 (va), and va is the athlete's average speed for the whole journey. (Note [1])

For the top male sprinter, there is generally a difference of about 0.05~0.1 seconds between his 100m/200m time run in windless conditions with a wind speed of +2 m/s and no wind, that is, △t=0.05~0.1 seconds. For example, the athlete can run for 10 seconds/20 seconds in windless conditions, and 9.90~9.95 seconds/19.90~19.95 seconds in downwind conditions.

Today's athletics, including other sports, are all about science and reason, Jesse Owens's era of hard work and talent is long gone, it is precisely because more and more scientific principles are engaged in training, nutritional intake, and data analysis, so the extreme performance of human beings is constantly improving.

Owens shocked the world by setting a world record of 10.2 seconds in the 100-meter run in 1936. In honor of this legendary and talented athlete, American sports agencies have established the "Owens Award", the world's highest-level track and field award, to recognize track and field athletes who have made outstanding contributions.

Today, more than 70 years later, many athletes around the world can run 10.20 seconds in the 100-meter run, thanks to the improvement of human living standards, but also thanks to more scientific and reasonable training methods.

Of course, Owens' 10.2-second run in 1936 is just as awesome today, and in modern times, there are many athletes who can run 10.2 seconds, but it will never be overflowing, and there are no more than five active sprinters in China who can run 10.20 seconds and 100 meters.

Du Ke, who just ran 20.06 seconds against the wind and won the 200-meter championship, is one of the few Chinese who can run within 10.20 seconds of the 100-meter run.

"I hope that when we wait for the 100m final, the wind will change." Duke began to pray that the men's 100m final would start at 9 p.m., hoping that it would be a tailwind and that the wind speed would not exceed +2.0m/s, as he would have liked so much to break the Asian record of 9.99 seconds in the men's 100m. +2.0 m/s is the upper limit of normal wind speed recognized by the IAAF, and +2.1 m/s is the excess wind speed. (+ for downwind, - for headwind)

In the media area, a group of Chinese reporters were happy and dissatisfied, half of them were female reporters, and Su Yun also came to Bangkok to report on the Grand Prix.

Among the on-site journalists in China, Japan, Qatar, Saudi Arabia and other countries, the proportion of Chinese journalists is the highest.

Qatar, Saudi Arabia, and Japan have either religion or the social custom of being a full-time wife when they get married, and the number of female journalists in these countries together is not more than half of the number of female journalists in China.

Women are half the sky, and Chinese women have held up half the sky in all walks of life

"The baby feels sorry for Du Dashen, how to break the battle against the wind?"

"If you wait for the wind to turn, Du Ke will definitely be able to run in 100 meters again within 10 seconds, and there is no pressure to break the Asian record, which is certain."

Female reporters chattered about the men's 200m final, which had just ended, and looked forward to the men's 100m final, which would be fired in just over two hours.

At this time, a short-haired female reporter said to Su Yun: "Sister Yun, what, little sister, I beg you something, wait for Du Ke if he wins the 100-meter championship and rushes into 10 seconds again, he will definitely accept your interview as soon as possible." After you were the first to be pampered by Duke, tell him that let him be the second pampered and pampered me, can I interview him for the second time? ”

"What's the pamper......" Su Yun was a little embarrassed, "You went to interview him through normal channels yourself, and I can't command him." ”

A female reporter with glasses answered: "Ouch, Sister Yun, don't be like this, we won't occupy your male god, so borrow it from us now, you can spend the whole night after ten o'clock in the evening, don't be so stingy." The position of your main room is firm and unshakable, just a few of us as concubines, and maids are fine. ”

Su Yun: "......" These Bichi, to put it mildly, just want to rob the man, of course I won't give you this opportunity.

Several Chinese female reporters were secretly more energetic, very subtle tearing and secretly pressing, and suddenly, a group of Japanese male reporters not far away looked at the Chinese warbler Yanyan.

The Japanese male reporters had strange and flirtatious smiles on their faces, and from time to time they pointed fingers at all kinds of Chinese female reporters, and whispered to each other.

"Sisters, look, what are those Japanese boys doing? Seems to be talking about us? "Chinese short-haired female journalists were the first to notice the unusual dynamics of Japanese male journalists.

Glasses Girl: "Why do I feel that those Japanese boys seem to be singing beautiful girls at the KTV point?" ”

The short-haired woman was very angry: "Damn, I feel this way too!" This group of Japanese men has ill intentions towards us Chinese beauties. ”

At this time, a Japanese male reporter with long hair and a ponytail walked to the Chinese reporter, the Japanese long-haired man had already locked the target, he came straight to Su Yun, and said to Su Yun very politely in English: "This beautiful lady, I don't know if I have this honor, can I invite you to the bar for a drink after the game?" ”

Su Yun shook his head: "I'm sorry, I don't have time, please go back." ”

The Japanese long-haired man is neither annoyed nor irritable, he is very patient: "What about tomorrow?" I don't think you should have returned home so soon, right? I am fascinated by your beauty and I just want to find an opportunity to express my admiration for you. ”

Of course, the Chinese reporters who came to Bangkok were not all sisters, but also men.

Several Chinese male reporters were angry, and the tallest Chinese male reporter stood in front of Su Yun, and said to the Japanese long-haired man with a cold eyebrow: "Where did you come from, go back, otherwise you will look good." ”

The Japanese long-haired man spread his hands and said, "Are Chinese men so rude?" ”

"I'm x your uncle's little Japan, don't you?" The male Chinese reporter was furious, he spoke in the Chinese dialect, rolled up his sleeves and prepared to do it.

"Brother Qiang, don't get excited." Su Yun grabbed Brother Qiang, and then calmly said to the Japanese long-haired man: "I can go drinking with you, but there is one condition." ”

"Oh, tell me about your conditions?" Japanese long-haired man came interested.

Su Yun looked at the preparation area of the Chinese track and field team in the distance, pointed to the Chinese team, and said to the Japanese long-haired man: "In the men's 100-meter final later, if the Japanese can defeat the Chinese player, then I will go to drink with you." ”

"Is this a bet?" The Japanese long-haired man became more and more excited, and immediately replied: "OK, I'll bet on you." ”

Su Yunxiu raised his eyebrows: "What if the Japanese player loses to the Chinese player?" ”

The Japanese long-haired man said with confidence: "Beauty, if our Japanese athletes lose to the Chinese players in the men's 100-meter final, then you can do whatever you want, and I am willing to do anything for you." ”

Su Yun pointed to the track and said coldly: "If the Japanese player loses, then you take off your pants and run around the field, do you dare to bet?" ”

"......" The Japanese long-haired man was a little confused, and he didn't dare to answer for a long time.

The Chinese reporters were all happy, and then collectively ridiculed the Japanese reporters, "Aren't the Japanese the best at taking off their pants?" What, scared? ”

The Japanese long-haired man was stimulated, then gritted his teeth and said, "Okay, I'll bet with you!" ”

When he was done, he turned around and left, and said to himself in Japan: "Look how our Kiryu-kun abuses your players, Bichi, I want you to look good at night!" ”

……

……

Note [1]: The mathematical model derivation formula for wind speed and correction time mentioned in this chapter is excerpted from the 1995 Issue 01 of Athletics, CLC Number: . This formula was produced in the 80s and has been used to this day, which is quite reliable, and the IAAF has also hired Professor Lin Thorne, the inventor of the formula, as a technical consultant for the IAAF. (To be continued.) )