cut the waves

If you say that altitude training is like letting a marathon runner run with lead weights tied, when Yu Yu returns to the plains again, all the lead weights on his limbs will be removed, and his body will be as light as if he is about to take off.On the plateau, Yu Yu only vaguely knew that he had "improved" from the blood test report, but now, he realized personally that his ability to sprint in a hypoxic state was more than a little stronger.

The most important thing about swim marathon is rhythm.Yu Yu realized very early that he could not exceed a speed in the first 8000m, otherwise, he might overturn in the last 2000m.That kind of focus is on the front, seeing opponents surpassing themselves one by one, but feeling powerless, like the heart and lungs are torn, it is the limit of the body.But now, his limit threshold has directly jumped up a step.

Yu Yu was pleasantly surprised by this change.

At the end of the World Cup last year, Yu Yu was still worried that his best performance might be like this, but the human body is so amazing-tearing muscles will grow more muscles, putting people in In an oxygen-deprived environment, the bone marrow grows more oxygen-carrying red blood cells.

This change has nothing to do with a person's subjective will.Yu Yu realized that it is an instinct—the instinct of life—in adversity, life uses all the resources under its control to overcome difficulties, just to survive better.Yu Yu sat by the pool, his soft ankles swaying in the water like a fish's tail. He stared at his body seriously, and suddenly felt a kind of endowed strength.In a place beyond his rational thinking, this power to overcome difficulties is engraved in his genes.

Perhaps, it is precisely because of this force that single-celled organisms moved from the sea to the land, and human beings moved from Africa to all continents, and returned to the sea again.This kind of power makes Yu Yu feel stable and infinite courage to explore his next limit.

"It's a good thing to respond well to high-altitude training. I have the opportunity to go there more in the future." Yan Zheng was quite emotional, "The German team, their coaches pay special attention to this. The German national team can participate in high-altitude training 3-4 times a year. .”

Yu Yu was curious: "Why do they go there so many times a year?"

"The red blood cell gain effect of yours is not permanent. Your red blood cells will be metabolized in about 120 days." Yan Zheng smacked his lips, "When the red blood cells produced on the plateau die, you don't need so many when you return to the plains. , the body won’t make it if it doesn’t need it, and the overall red blood cell count will drop. The duration of this plateau effect varies from person to person, at most one and a half months.”

Yu Yu calculated the date, and suddenly felt a hammer hit his chest: "Then I am not..."

Generally speaking, the coach will end the high-altitude training one month before the competition, and the winter training of the national team is arranged in January and February all year round, mainly for the National Swimming Championship in March.However, considering weather factors, the National Swimming Marathon Championships are generally held in May and June.This year, due to the selection of the Asian Games, the Marathon Championship is already earlier than in previous years, and it is scheduled for the beginning of May - but anyway, by then, Yu Yu's "plateau gain" has long since expired.

Many professional swimmers who participate in swimming marathons will participate in some swimming pool events, but for Yu Yu, he can't keep up.The corner of his mouth twitched, unrequited love: "...I have practiced loneliness."

Yan Zheng laughed loudly: "You can't say that! Your starting point was too low before. Maybe it went up by 30% and fell by 25%. You still have 5% more!"

Yu Yu: "..."

He felt like a character in the game, who accidentally obtained a buff called "Plateau", which might allow him to leapfrog and knock down the boss.However, there is a countdown timer under the "buff" icon, flashing on and off, reminding him that the buff may disappear at any time.

Before the red blood cells left, Yu Yu's heart began to ache: "Then—then can't I keep these red blood cells?"

At least until May!

"Yes, there is. There is something called a hypobaric oxygen chamber, which can simulate a plateau environment. They are useful in hospitals, aviation, etc., but this thing is relatively expensive to build, and we don't have it in our team." Yan Zheng sighed. , "In the past, there was a team at Ningti University who did research on this. The number of red blood cells can be improved, but the improvement of the specific performance... Just like that, I feel that the cost-effectiveness is not particularly high, so the team is not adjusted."

Yu Yu thought about it. It was impossible for him to go to the hospital to borrow a hypobaric oxygen chamber, and it was impossible to go to the plateau again before the competition in May. He suddenly became depressed: "..."

"Don't think so much about what you have." Yan Zheng patted his head, "The training itself is still the first, and the plateau gain is the icing on the cake."

Yu Yu tasted the sweetness of high-altitude training, but he couldn't use it in his own competition, so he was naturally very unwilling.The cost of using a hypobaric oxygen chamber is not small, even for scientific research purposes, it needs the support of scientific research funds.Yu Yu asked Tao Zebo for a while, and there was no teacher in Ninggang who was studying this recently, so he had to give up.

Su Liao picked up a strawberry and put it in his mouth, nodded: "So, your core appeal is lack of oxygen." After speaking, he stuffed a strawberry into Yu Yu's mouth.

By the way, the little killer whale bit his finger with an "ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh"

Su Liao: "..." This really affects people's study.

The second middle school started on the eighth day of the third year of high school. After Yu Yu returned to school, he made up the final exam of last semester. Not long after, he took part in the first model of Yan Province.Originally, Yu Yu came tonight to ask Su Liao for an analysis. He didn't talk much about the test paper, and after chatting, he talked about hypoxic training again.

Su Liao swiped his phone and showed Yu Yu a picture: "Look at this, a hypoxic training mask for sports."

"I asked Boss Yan," Yu Yu pouted, "He said that this thing has no scientific research to prove its effectiveness, and it cannot quantify the amount of oxygen in and out, so it is very unreliable. Moreover, this mask can be used for running, but not underwater. "

Su Liao looked at the foreigner wearing a mask on the treadmill in the advertisement picture, and nodded.While eating strawberries, he scrolled through the information: "I also found one, saying that he held his breath and swam during training to create a state of hypoxia."

"I discussed this with Yan Touer before. He said that it is still impossible to scientifically quantify my hypoxic state, and it may change my swimming habits. He does not recommend that I do this."

Su Liao thought about it, and it was clear that Yan Zheng wanted quantifiable hypoxic training, but he couldn't spend too much money.

"Huh."

Seeing that it was getting late, Su Liao tidied up the table and took out the paper: "Let me think about it, let's talk about the paper first."

……

Su Liao was really thinking.

If you don't use a hypobaric oxygen chamber, how can you create an environment that simulates plateau exercise on the plain?

One night, Su Liao was scrolling through his Moments, and accidentally saw that the proprietress of the dive shop named "Little Girl" posted a set of advertisements for the latest underwater photography samples: There is a bicycle in the blue background, and the protagonist is well-dressed. For hip-hop, straddling the bicycle in the water, both the person and the car have a weightless "elegant feeling".

Hypoxic training, diving, underwater bicycles—a few sporadic keywords suddenly became a thread in Su Liao's mind.

Many swimming pools in Ninggang have set up a group exercise class called "Underwater Spinning Bike", basically moving the spinning bike into the swimming pool. It is said that the fat burning effect is twice as much as that of land spinning.Wang Xiaopang took this class when he lost weight.However, in this class, only the lower body of the students on the bicycle is immersed in the pool, and the upper body breathes normally on the water.What if, like in that photo, both the person and the bike were in the water?

Yu Yu can pedal a bicycle underwater, and then breathe through the scuba device of diving.

There is a gas cylinder behind the diver. Many people mistakenly call it an "oxygen cylinder", but in fact the gas cylinder is filled with compressed air, and the ratio of nitrogen and oxygen is exactly the same as that of normal air.Under normal circumstances, a diver will "twist one turn first, then return half a turn" to exhaust normally, but he can reduce the amount of gas discharged by manipulating the exhaust valve to simulate the "hypoxic" environment of the plateau.

The lack of oxygen on the plateau is not because the composition of oxygen in the air has changed, but because the atmosphere is "sucked" on the surface by the gravity of the earth. The higher the altitude, the less air there is, so the oxygen naturally decreases.At the altitude where Yu Yu trained on the plateau, the oxygen was about 2-30% less than that on the plain, so he only needed to reduce the exhaust valve's exhaust volume by 2-30%.

In this way, he can create an economical, environmentally friendly, quantifiable, hypoxic environment that simulates plateaus for Yu Yu to conduct aerobic training.

Su Liao suddenly became excited.He first consulted Yan Zheng and the diving instructor of the diving shop to confirm the feasibility of this matter, and then went to the public swimming pool open to the public of the Shaoxing Sports School to borrow a stainless steel underwater bicycle.

After the proprietress of the diving spot, "Little Sister", asked Yu Yu to be a mermaid model two years ago, she really liked this child.When Su Liao said that Yu Yu needed gas cylinders to prepare for the national competition, he waved his hand and they were all free. Of course, gas cylinders were not expensive in the first place.She also asked the staff to send seven gas cylinders to the swimming pool a week without paying a penny.If she draws something, she will take pictures of mermaids when Yu Yu is free.

Su Liao directly agreed on behalf of someone.

He kept it from Yu Yu all the time, and spent about a week to get in touch with the bicycle and the gas cylinder.That day when Yu Yu walked out of the locker room, he was stunned to see the equipment by the pool.Su Liao waved to him with a smile, his eyes were shining like stars: "Come and try the hypoxic training equipment I designed for you!"

Yu Yu: "?"

Here it comes again, Su Liao uses his "look at the little white mouse" eyes.At that moment, Yu Yu remembered the fear of the bullfrog in the biology laboratory being dominated by Su Liao.

Su Liao briefly introduced the principle to Yu Yu, and then asked: "Do you know how to use this gas cylinder and the second stage?"

Yu Yu frowned: "Of course."

Su Liao excitedly put on the vest for him: "Let's take a normal breathing test first, a bottle of gas, and the speed at which you step on the wheel, and time it for you. This time is the baseline for 100% oxygen consumption. Then control the gas volume with the exhaust valve, Hypoxic and try again."

In general diving, when there is only 50kPa left in the gas cylinder, you must be ready to go ashore, but Yu Yu's head is under the water the whole time, and there is no danger of life, so you can directly use up the gas cylinder.Yu Yu emptied the gas cylinder in 30 minutes of normal breathing, and it took 40 minutes in the state of controlling the exhaust valve—assuming that the total amount of air in the gas cylinder remains unchanged and the speed of the bicycle remains unchanged, he has indeed completed it. 40 minutes of low-oxygen exercise.

Thinking of this, Yu Yu became excited again.Although, under the watchful eyes of the whole team, wearing swimming trunks and carrying diving equipment, stepping on a spinning bike in the 2.2m deep water area of ​​the swimming pool is really a unique experience in life.

Yu Yu raised his head from the swimming pool, and saw Su Liao squatting by the pool and looking at him with a smile.Yu Yu was really curious: "It seems to be a bit like altitude training... Where did you get the folk prescription?"

"I thought about it myself. For your birthday next month, I can't think of a gift for you." Su Liao said with a smile, "After much deliberation, what you want most may still be this——Can you help me with hypoxia stimulation?" I don’t know if you can maintain the red blood cells, but other methods are not working right now, so I can only build a hypoxic simulation system to send you off.”

"Happy birthday to you in advance, little killer whale."

It is very exhausting to complete the underwater bicycle under the condition of limited breathing, and Yu Yu is a little panting when he comes out of the water.He didn't know if this strange system could make people hypoxic, but Su Liao's words really made him a little hypoxic.

Su Liao looked at him with bright eyes, which made Yu Yu's heart soften.Just as Yu Yu was still immersed in the emotion of "what kind of god is my boyfriend", Su Liao's enthusiasm for experimenting came to the fore: "Honey, I have another idea."

Yu Yu: "?" No.What did Su Liao call him?Classmates are still in school, pay attention to the impact!

Su Liaoshang couldn't help himself in his brainstorming: "The essence of hypoxia can stimulate the growth of red blood cells is because hypoxia will make the body send a signal—I don't have enough oxygen, please hurry up and produce more oxygen transport soldiers—— That is to say, the oxygen you have is less than the oxygen you need. While reducing oxygen, you can also deliberately increase oxygen consumption. For example, a cold environment will stimulate the body to increase oxygen consumption. You can try in cold water Cycling!"

Yu Yu hesitated: "... how cold is it?"

The light in Su Liao's eyes became brighter and hotter: "Is the minimum temperature of your competition not lower than 16 degrees Celsius? Do you want to try 16 degrees?"

Yu Yu: "?"

After being moved, Yu Yu found that Su Liao's eyes were very strange.

The author has something to say: Reference for the principle of plain hypoxic training: Kang Jian. The effect of intermittent hypoxic training on the physical function of swimmers [D]. Beijing Sport University, 2004.

As for the hypoxic training operation of Yu Yu’s underwater bicycle, I compiled it based on my understanding of scuba equipment. I’m not sure whether only adjusting the exhaust valve can meet the requirements, but the exhaust valve can’t be done. Add another device to reduce oxygen distribution. Pressure should be fine too.

Thanks to the little angels of irrigation nutrient solution: 20 bottles of wormwood dumpling; 10 bottles of Yimengnanke; 5 bottles of Yilu Nikuanglu and Qiyuan;

Thank you very much for your support, I will continue to work hard!