The Su God of the Reopening of the Sports Arena

Chapter 922 Get it done next month!Please use me as a mannequin!
Ersha Island.

In fact, Liu Xiang really wants to hear how the best sprinters in the world do their daily winter training.

But listening to it, he felt...

Still slipped away.

In the mouths of these people...

"Don't speak human words" at all.

What is "the late stage of landing buffer", what is "the projection point of the center of gravity of the human body", what is "hip joint muscles perform restrained contraction" and what is "the horizontal component of the support reaction force generated by the contraction force acting on the ground through the supporting feet is increased"... this is Well, he knew what each word meant when he took it apart, why did he become more and more confused when he combined it.

Moreover, their discussions were so heated that even Liu Xiang sneaked past them occasionally without noticing.

"It's still the impact of the grounding distance on human body movement." Su Shen pointed to an angle of the screen, and said: "The grounding distance refers to the distance between the foot's landing point and the vertical line of the body's center of gravity. The traditional model in our country is due to the forward pedaling The reaction of the support is a kind of resistance. Only by reducing the resistance can the running speed be exerted. That is to say, the angle of the front kick angle must be increased, and the distance between the foot landing point and the vertical line of the body's center of gravity must be shortened. But this has been proven now There is a problem." Su Shen drew a big cross on the whiteboard next to him, and continued: "From the technical point of view of the landing buffer, the increase in the landing distance prolongs the deceleration stage in the early stage of the landing buffer, which should not be conducive to Give full play to the running speed. But the sprint is a whole, if you consider the short term, it is true, but if you consider the entire 100 meters, is there any other discovery?"

"So the answer is?" Randy and Su Shen are no longer the previous model of teacher teaching apprentices, but have become the same one-to-one equal communication mode as Su Shen now.

This change in the identities of both parties is enough to prove many things.

"Yes." Su Shen nodded and said: "Our research in Su Shen's laboratory is as follows. Although it seems to be damaged in the short term, from the perspective of the entire running cycle, the increase in the landing distance of elite athletes not only increases the hip joint Restraining the degree of contraction also increases the degree of retraction and contraction of the knee and ankle joints, increases the range of motion of the knee and ankle joints, and reserves energy for the kickback, which is most conducive to the development of favorable stride frequency and stride length."

"This is some landing data of American athletes in the 90s. Although it is a bit blurry through old video analysis, it can still be roughly restored with current technology. This is the landing data of our Asians. Have you seen it? Our landing data is obvious. There is a large difference compared with the other party. The reason for this is not only the backwardness of the concept and the level of technology, but also the physical fitness I have been talking about. Without physical fitness as a guarantee, it is impossible for you to run in the technical cycle of running. Appropriately increasing the landing distance during the forward kick stage, it is impossible to easily prolong the landing buffer time."

"So that's how it is. We went on the wrong path in this respect." Zhao Haohuan nodded after hearing this. He was no longer so surprised by God Su's various knowledge reserve abilities, and even gradually took it for granted.

It's not surprising that God Su knows, but it's strange that God Su doesn't know.

"But we have tried it, and the results are not particularly good. Is it because you Asians can squat in Asia, but Omi people can't squat in Asia? Is it a physiological problem?" Randy also touched his chin and said expressed his own opinion.

It is not easy for Omi people to do Asian squats, God knows, but this is for ordinary people, athletes have sufficient flexibility and joint mobility, and Asian squats are still not a problem.To put it bluntly, these things can be used after further opening the door of the body through training, which does not mean that Omi people can't do it no matter how much they train for a lifetime.But this problem, Su Shen thinks it is not here, said: "I think the structure, function and strength of the ankle joint have a greater impact on the cushioning of the ground."

"Modern science has proved that the structural and functional characteristics of the ankle joint are of great significance to running ability. Because the structural and functional characteristics of the ankle joint include: the effect of the size of the talus, the elastic deformation capacity of the triceps muscle of the calf, etc., and at the moment of cushioning , when the forefoot of the swinging leg touches the ground in a way of pawing the ground, due to the forward and downward inertia, the forefoot quickly transitions to the full sole of the foot. When the instep is bent to a certain degree, if the athlete's talus is relatively large or the talus If the position from the bottom of the foot is relatively high, or the elastic deformation capacity of the triceps tendon of the calf is relatively strong, then the degree of dorsiflexion of the ankle joint should be reduced in theory, forcing the sole of the foot to start transitioning from the sole of the foot to a "credit card" when landing. After all, on the premise of ensuring sufficient buffering action, shortening the buffering time and speeding up the buffering speed is one of the functions of the "credit card landing technology". , Improving the efficiency of kicking the ground and improving the efficiency of running is of great significance. Then I think the focus of our subsequent training should be to overcome this technique, and we must first focus on the ankle and calf triceps.”

"Because of the contraction force of the ankle joint, it is also very important for the correct completion of the ground-grabbing technique. At the moment of landing, the swinging leg actively swings backwards and downwards, forming the forefoot of the swinging leg to quickly land on the ground. For example, the muscle contraction force of the ankle joint is relatively strong, which can increase the power of the forefoot to push the ground backward, reduce the horizontal speed at the moment the foot hits the ground, increase the angle of the front pedal angle, and buffer the horizontal braking force of the ground against the human body. The feet of the supporting legs can be quickly changed from full-foot support to "credit card support", and the buffer time can definitely be shortened under the premise of ensuring sufficient cushioning."

"There is also this aspect that I think can be used for reference." Su Shen clicked on another computer screen and said: "The latest research report of our laboratory, as we all know, in muscle mechanics, muscles are divided into three parts: the contractile element , series elastic elements, and parallel elastic elements. When the muscle contracts, first the contractile elements contract to generate tension, and at this time the force growth cannot be measured at the outer end of the muscle. Then, the shortened contractile elements pull the series elastic elements Long. The change in force at the end of the muscle cannot be measured until the tandem elastic elements have been elongated to a sufficient length, and in that case... look at this."

"Electrical activity occurs in the leg flexors 15-20 ms before the foot hits the ground."

"What does this indicate? It indicates that the motor neurons are sending impulses to the muscle earlier than the moment of landing, before the muscle has had time to contract, and the length of the activated muscle is less than the equilibrium length."

"Placing it on the ground means that the ground reaction force that the foot receives at the moment of landing is resistance, but this process plays a positive role in completing the entire movement, and because the back pedal is the foundation of the forward movement, the force of the back pedal should be the forward swing. The continuation of the force on the ground, and the buffer is the prelude to the kick. The buffer is essentially the braking of the body moving towards the support direction, and the buffer can pre-stretch the muscles to the optimal initial length, thereby storing elastic energy and preparing for the back kick. The traditional point of view is to analyze the biomechanical characteristics from the time when the foot hits the ground until the projection point of the center of gravity of the human body moves to the top of the landing point. It has not noticed that the human body is in rapid motion during sprinting, and the feet supporting the legs are in the past. The soles of the feet turn to the support of the whole sole of the foot, followed by the heel turning to the support of the forefoot, so it is impossible to further understand the phenomenon of deceleration and acceleration of the human body when landing on the ground.

"I didn't pay much attention to what you said." Randy seemed to have realized something, something that was still bothering him, had been "triggered" by God Su, and immediately asked: "So what can I do to further understand it? Woolen cloth."

It's no wonder that Randy is not very clear, mainly because at this time, there is not much research on the landing buffer, and there is no subdivision.

But after 2020, it has begun to be subdivided very clearly.

"Furthermore, in order to reveal this problem, our laboratory divides the buffering process of sprint landing into the pre-buffering stage and the post-buffering stage. They use the projection point of the center of gravity of the human body and the position phase of the heel as the judgment standard."

"Before and after?" Randy continued to ask: "And then, how to divide."

"From the time when the foot touches the ground until the body's center of gravity moves to the vertical upper part of the heel, this is called the early stage of buffering. At this time, the body's center of gravity is behind the support surface, and the horizontal component of the support reaction force received is opposite to the direction of human body movement. The movement acts as a resistance, and the human body decelerates. From the projection point of the center of gravity of the human body at the vertical top of the heel to the vertical top of the landing point, it is called the late stage of buffering. The main power of the human body to accelerate the movement in the late stage of landing and buffering comes from the action of swinging legs Swing upwards in advance and make opposite movement with the supporting legs, and act on the ground through the supporting legs, so that the human body can obtain the supporting reaction force."

"Can it still be like this? Damn it, why didn't I think of it." After hearing this, Randy's eyes seemed to be bright, and he wanted to slap his forehead and slap himself to death: "It's a pity that Ralph Mann is taking Liu Fujian, otherwise, this A wave of new concepts will surely make him, an expert in biomechanics, ecstatic."

"Then let's build a new chain model of the lower body link." Randy said: "The existing one has serious shortcomings and needs to be modified."

"This model needs to be calculated and sufficient, and it may take a week or two..." As soon as Randy finished speaking, Su Shen waved his hand and said, "No, I can sort it out during my lunch break. I will bring it when I come over in the afternoon." .”

Randy: ...

special.

Although he knew that Su Shen was a "scientific research monster", it would take several weeks to rely on the current high-tech system. He said that he could do it with a lunch break at noon... Is this damn human?
However, he is the "thesis output machine" in the sports field of this era and the "absolute pioneer of technological innovation" in this era. Thinking of this, Randy can only feel his heart and has to calm down a little.

Because there is absolutely no need for comparison.

After Su Shen has created countless theoretical innovations, he is already one of the true masters of track and field theory in this era.

He had seen Marlon Burke with his own eyes, that proud old guy, and he almost recognized God Su as his "godson" on the spot.

And since I came to Ersha Island for less than two years, I actually learned things faster, more, and systematically than I used to grow up. I don’t know if I earned it or I earned it. .

"However, it is still difficult to use him in the curve." Su Shen also thought for a moment, and frowned slightly: "Because when running on the way to the curve, due to the relatively slow movement speed of the human body and the posture of the movement The inside of the road is inclined, and the foot of the inside leg forming the curve is supported by the forefoot, and the foot of the outside leg of the curve is supported by the inside of the forefoot. If there is a situation where the whole foot is on the ground or the credit card is on the ground, it will inevitably cause the talus and support of the supporting leg The morphological characteristics of the tibial contact surface of the leg change. Therefore, when the human body is running on the ground for buffering during a curve, athletes with good ankle joint strength have relatively more forefoot support on the ground; and athletes with poor ankle joint strength have limited support ability. There are relatively many situations where the soles of the feet are on the ground. If I can optimize this aspect in the future so that it can be used in corners, then my overall strength in corners will definitely take another leap."

"When the time comes to face that Zentraedi star, I will have a bit more confidence."

Randy: ...

Zhao Haohuan: ...

Randy was once again stunned that Su Shen didn't just want to thoroughly understand this "credit card technology", he wanted to optimize and innovate again based on the original foundation.

That is to say.

How could this kid be so idle, which technology has been in his hands, it is either an upgrade or an optimization.

Even the latest "credit card landed", even the American himself is still in the research stage, he has already started to work hard towards version 3.0 or even 4.0, and version 5.0.

It's just perverted.

With him, I dare not say that I am a "sports research coach".

And Zhao Haohuan was stunned.

God Su, this guy actually...

Still thinking about going to a showdown with that monster Bolt.

and.

Still on the most unlikely of bends.

After witnessing Bolt's horror, he still felt that he wanted to challenge from the bottom of his heart, not someone who talked about it, Zhao Haohuan felt...it was really scary.

Anyway, I, or the entire track and field world, have been "shaken by Dao Xin" because of Bolt's sudden birth.

Only him.

Dao heart is stable.

Nothing has changed at all.

This mentality, really, the further back, the more Zhao Haohuan felt that Su Shen was "exaggerated", this is an understanding that cannot be produced when the strength is not strong enough.

"Okay, let's start then, let's solve the problem of ankle energy first."

"Step by step, everyone strives to understand it as soon as possible."

Ok?Isn't that right, you guys?Isn't it us?

"Then, when are you going to get it done?" Zhao Haohuan asked cautiously, although he regretted it as soon as he asked.

"Ah? Me, let's see if it can be done next month. If it's done, you can use me as a mannequin for research. It will definitely get twice the result with half the effort."

next month...

Zhao Haohuan really wanted to slap himself.

Why don't you learn how to make pancakes, my damn curiosity.

Time passed in the blink of an eye, and soon 2008 came to the New Year.

The bell of 2009 is coming.

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(End of this chapter)