After the rest of the things are arranged.

The highlight is definitely the only two yellow-skinned ones who break ten.

After reaching this point, their combat effectiveness has even been directly equated with the yellow-skinned whole of Asia.

In addition to taking care of the rest of the items, you can't pull down, and the latest technology must also start training.

And obviously, sprinting is generally in the range of 40+ steps, that is, your landing technique, you have to practice well, there are more than 40 strokes. It seems to be more than 40 steps, but this is for ordinary people, for top 100-meter athletes like Su Shen, how to pick out the details may be the key to success or failure.

Bang, bang, bang, bang, bang.

Zhao Haohuan ran quickly, and after a few dozen meters, he stopped and walked over to watch the arrest of the high-speed camera with Su Shen.

A PULNIXTM-6710CL high-speed camera system is used.

This is the world's most advanced high-speed camera system.

Otherwise, how could Yuan Guoqiang say that Ersha Island was the absolute No. 1 track and field mecca in Asia in the past, the first thing is ......

You've got to be equipped to keep up, don't you?

Otherwise, what kind of No. 1 track and field mecca are you talking about?

This is not the time when results could be made based on a little personal experience.

After Yuan Guoqiang used these high-tech technologies, he understood why Su Shen had always insisted that he must do a good job in the "scientific and technological upgrading of Ersha Island". Because compared to experience and the naked eye, this high-tech product can instantly make you understand what is called dimensionality reduction strike.

A lot of things that don't look too much wrong to the naked eye may be completely different when you look at them in a high-speed camera system.

Then equipped with a Sushen laboratory to start the trial operation of the ATAS 3D image analysis system.

Everything began to let Ersha Island completely enter the environment of Ersha Island that Su Shen was familiar with.

Even.

What's more.

"It's too thick, Gou Huan, don't talk about credit cards when you make a comeback, I'm afraid it's really a Xinhua dictionary." After reading the joint analysis of the PULNIXTM 6710CL high-speed camera system and the ATAS 3D image analysis system, Su Shen said: "It's too slow to run like this, and your previous rhythm may be better." ”

Zhao Haohuan can also see clearly, this is the benefit of technology, showing it in front of your eyes, so that you can see it clearly.

I won't make any excuses for myself at all.

"During the sprint, the pedal is off the ground, after the calf is folded, hook the toe and actively swing forward to support the moment, the ankle joint is compressed, and the heel is only a credit card distance from the ground." Zhao Haohuan immediately recited the basic "credit card rules" in his mouth, and it could be seen that he had already memorized it well, but being familiar with it does not mean that you can easily display it.

"Zhao, I think the biggest problem is that your movements are unfamiliar, and you are always distracted, resulting in your moving forward completely gone." Randy is also here, and his main task is to be fully responsible for the breakthrough and improvement of Su Shen and Zhao Haohuan in this year's winter training.

"And here." Su Shen pointed to the analysis clips that were constantly playing on the computer screen in slow motion, and said, "I think Gou Huan's biggest buffer moment is not done well, probably because his center of gravity is naturally too high. Between the anterior support and the posterior support, it should be the moment when the angle of the three joints of the man, knee, and hip is minimized, and the center of gravity of the body is past the forefoot of the foot, but there is clearly a big problem here. ”

"I'll see mine later, coach, I think I might have a problem with that." Su Shen has always been outspoken about problems. Because this is not politics and the workplace, this is a track and field field, everyone is a member of the national team, and all the goals should be to improve their performance.

And he is unabashed about his own problems, which also makes many people feel that Su Shen is really "pure heart".

When ordinary people reach the position of "backbone", they will not take the initiative to admit it even if they know that there is a problem, but Su Shen's side has basically never had such a thing.

True. Something to say.

Bang, bang, bang, bang, bang.

After Su Shen also ran a group, he came over to look at the analysis of the system, and after looking at it for a while, Randy nodded and said, "That's right, Su, you also have this problem, and you also have a problem with your maximum buffer moment." Zhao may be due to his height, the center of gravity is too high, and you are pressing too hard, which affects the rhythm of the credit card landing. ”

Su Shen looked at it, it was true, what Randy said was not wrong at all.

He ran too hard in this group.

After another set.

"Zhao, the ankle angle when you get off the ground is a little better, but the ankle angle at the maximum cushion moment is still not good, it's too high." Randy looked at the screen analysis system and said, "The change in the velocity of the body's center of mass in the front support stage is very problematic. ”

"Zhao, you must know that sprinting is a typical event with both speed and strength, and since it is an event with both speed and strength, the level speed of the center of mass will be one of the important factors affecting the performance of sprinting. That being the case, we strive to achieve maximum horizontal speed and reduce vertical speed in sprint training. Look at your piece. Randy pointed to a spot on the screen and said, "The vertical velocity of the center of mass has a greater effect on the horizontal velocity, and the greater vertical velocity causes the center of gravity to fluctuate too much, which affects the velocity in the horizontal direction, causing the loss of velocity in the horizontal direction." ”

Zhao Haohuan looked over and found that this was really the case.

"Maybe I'm paying too much attention to the problem of maximum buffering and neglecting this place, I'll try to improve it later."

"Well, you have to remember that on the premise of ensuring that the forward horizontal velocity is large enough, the speed in the vertical direction should be reduced to create favorable conditions for obtaining a large horizontal velocity." Randy said, pointed to another one, and said: "And your hip delivery, it has also been affected, forget about the hip delivery, you are too tight, your hip delivery is already very familiar, you don't need to think about it, but it will affect it." ”

"Take it easy and focus on what you want to improve."

"Okay, I'll try again later." Zhao Haohuan nodded.

After that, Su Shen ran again and conducted data analysis and arrest again.

This is the improvement mode of the real super masters, because for them, most of the existing technologies have basically been mastered, and there is only a problem of application and on-the-spot play. So what they want to improve has already begun......

Detail.

Detail.

Detail.

Important things, say three times.

So you can often see that on Ersha Island, Su Shen and Randy are sitting together, staring at the computer screen, expressing their opinions from time to time, and nodding from time to time, this is the improvement scene of international masters. It is completely different from those who have not broken ten, and there are still many technical ones that have not been thoroughly understood.

"You also have a big problem with the center of mass this time." Randy pointed to the pop-up part of the analysis system, clicked on the pause, and said, "In the front support stage, the average velocity of the center of mass of the forefoot support technology is 8/s in the horizontal direction and -0/s in the vertical direction; The average velocity of the center of mass of the full sole support technology is 8/s in the horizontal direction and 0/s in the vertical direction. ”

"The average velocity of the center of mass in the horizontal direction is 9/s in the horizontal direction and 0/s in the vertical direction."

"At the same time, you also have the problem of poor change in the speed of the body's center of mass in the posterior support stage." Randy said quickly, "Originally, this landing technique should have shown a high horizontal velocity, and the average velocity in the vertical direction was small. This shows that the speed of the technology in the vertical direction is small, the body center of mass undulation is small, and the impact on the speed loss in the horizontal direction is small, which is conducive to the horizontal forward speed in the rear support pedal extension stage, but this piece is not done well, and the entire center of mass point begins to float. We have studied and know that the "credit card" landing technique should exhibit a high horizontal velocity and a small vertical velocity be. It should be more conducive to the horizontal acceleration of the center of mass, and your wave is still more like the forefoot support technique. Although there is a large horizontal velocity change, the vertical velocity is also very large, which will inevitably cause the fluctuation of the body's centroid to be too large, which will affect the forwardness of the centroid velocity. ”

"Hmm." Su Shen also looked at it seriously and nodded slightly.

At this level, even the slightest technical change can make or break the difference.

That's why he still needs Randy as a professional master coach.

A person is reckless, that is only suitable for the grass creation stage, only suitable for the stage that has not broken ten at the beginning, after breaking ten.

On the contrary, we need more help in order to make a better breakthrough.

……

"The forward push phase refers to the process from the time the foot hits the ground to the time when the projection point of the body's total center of gravity moves to the top of the landing point. At this stage, the foot of the supporting leg is changed from forefoot landing support to full foot landing support, and from full foot landing support to forefoot landing support. Therefore, it is better for the movement of the human body to move from the back of the support point to the vertical above the heel and from the vertical above the heel to the vertical above the forefoot when the human body is cushioned on the ground. You can try it. ”

……

"I think that in the early stage of landing buffering, because the projection point of the total center of gravity of the human body falls after the landing point, after the swinging leg hits the ground and becomes the supporting foot, the force of the sole of the foot to the ground is directed forward and downward, and the force is decomposed into a vertical downward component and a forward horizontal component, so that the body produces a force that slides forward, and at the same time, the body is subjected to a reaction force in the opposite direction of the equal size of the ground, and the support reaction force can also be decomposed into a vertical upward component and a backward horizontal component. The direction of this force is opposite to the direction of the body's movement, and it is the resistance of the movement that is a braking force that prompts the human body to slow down. Because the human body swings the leg in the air is actively backwards and downwards, so that the foot of the swinging leg actively and actively lands in the way of grabbing the ground, the correct ground-grabbing technique can reduce the horizontal speed of the foot on the ground relative to the ground at the moment, and reduce the horizontal braking force of the ground facing the human body. ”

……

"In the later stages of the landing cushion, the projection point of the body's center of gravity rapidly shifts from the vertical above the heel to the vertical above the position as the body moves forward. However, since the human body is moving above the support surface, the support reaction force on the human body will be directed forward and upward. The horizontal component of the human body under the support reaction force is in the same direction as the human body's movement, which is a kind of driving force, which prompts the human body to accelerate the movement, but I didn't feel the right thing when I just ran, and I didn't feel the body moving forward at all. I don't know where it is, except for the problem, please help me wait and see. ”

……

"I think there's going to be a problem, probably because the angle of the hip tends to increase all the time during the landing cushion. The knee angle is decreasing all the time. The angle of the ankle joint is reduced first and then increased, indicating that in the forward pedal stage, the hip muscles are always restrained from contraction, and the knee muscles are contracted backwards. When the human body shifts from the forward push to the back kick, the angle of the knee joint also changes from the original decreasing to increasing, and the contraction characteristics of its muscles also change from concession to restraint. The angle of the ankle joint is reduced until the center of gravity of the body moves from the back of the support point to the vertical above the heel, and decreases until it can no longer be reduced. Its muscles are contracted backwards. In the process of moving the center of gravity of the human body from the vertical top of the heel to the vertical top of the place, due to the structural characteristics of the ankle joint and the deformation range of the Achilles tendon, the angle of the ankle joint can no longer be reduced, and then the heel heel and the angle of the ankle joint are forced to increase and turn into restrained contraction. ”

"No, no, I still think it's in the early stage of landing cushioning. The reason why the center of gravity of the human body is behind the supporting surface. Because the human body is supported horizontally backward by the ground given by the soles of the feet, the reaction force is resistance. In this process, although the hip muscles are contracted restrainedly, the contraction force acts on the ground through the supporting foot, and the horizontal component of the supporting reaction force is the same as that of the human body. This is the driving force, but the driving force is less than the resistance, so the human body is still decelerating. ”

But if you say that, you can't explain the problem that the projection point of the human center of gravity is shifted from the vertical top of the heel to the vertical above the place in the later stage of the landing cushion. Because the horizontal component of the supporting reaction force is the same as the direction of human movement, and if the hip joint and ankle joint muscles are restrained and contracted at the same time, the contraction force is increased by the horizontal component of the supporting reaction force generated by the supporting foot acting on the ground, and the human body accelerates the movement, which is obviously not in line with this. ”

……

The entire winter training was carried out in such an atmosphere.

If there is no god-given perverted plug-in and can only rely on future scientific knowledge, this is the scenario.

This is also the scene that will inevitably occur when the real elite-level track and field winter training is added to the adjustment technique.

Of course, this is a matter that has been taken for granted in Ersha Island, but it is shaking the hearts of Liu Xiang and Sun Haihua every day.

After all, if athletes can participate in discussions with coaches, then how good the training base should be.

It's unimaginable.

"I'm really looking forward to the results of this winter training."

I have to say that when he first came to Ersha Island, Liu Xiang himself began to look forward to and look forward to his performance after the winter training.

It is said that the "winter training is magical" on Ersha Island, and this time I want to see with my own eyes how amazing it is.

PS: The first update ~~~~~~~~~

The technical part is more difficult, so it's still the same as before, and I can write a little slower~~~~~~~~~