Ersha Island.

In fact, Liu Xiang really wants to hear how the best group of sprinters in the world train every day in winter.

But as he listened, he felt...

Still slipped away.

These people's mouths...

He is "not talking about humanity" at all.

What is "latest stage of landing buffering", "the projection point of the human body's center of gravity", "the hip muscles undergo restrained contraction", "the horizontal component of the support reaction force generated by the support foot acting on the ground"... This, he knows what it means when he disassembles every word, and why he becomes more and more confused when he combines it.

Moreover, they were discussing it in full swing, and even Liu Xiang was not paying attention to it occasionally.

"It's still the impact of the grounding distance on the movement of the human body." Su Shen pointed to an angle of the screen and said: "The grounding distance refers to the distance between the foot's position and the vertical line of the body's center of gravity. The traditional Chinese model was that the support during the front pedal was a kind of resistance that requires a reduction in resistance in order to exert the running speed. That is to say, the angle of the front pedal angle must be increased and the distance between the foot's position and the vertical line of the body's center of gravity must be shortened. But now this has been proven to be a problem." Su Shen drew a big fork on the whiteboard next to him and continued: "From the technical perspective of grounding buffering, the increase in grounding distance extends the early deceleration stage of grounding buffering, which should be detrimental to the speed of running. However, sprinting is a whole. If it is indeed the case in the short term, if the entire 100 meters are considered, are there any other discoveries?"

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

This change in identity between the two parties is enough to prove a lot of things.

"Yes." Su Shen nodded and said, "The research in our Su Shen Laboratory is as follows. Although it seems to be damaged in the short term, from the entire cycle of running, the increase in the landing distance of outstanding athletes not only increases the degree of restraint and contraction of the hip joints, but also increases the degree of retreat and contraction of the knee and ankle joints, increases the range of movement of the knee and ankle joints, and reserves energy for the rear pedal. This is the most conducive to the advantage of the performance of stride frequency and stride width."

"This is some landing data for American athletes in the 1990s. Although it is analyzed through old videos and is a bit vague, it can still be restored using current technology. This is the landing data of us Asians. Have you seen it? Our landing data is obviously much worse than the other variance. This is the reason. In addition to the backward concept and the problem of technological level, there is also the physical fitness I have always mentioned. Without physical fitness as a guarantee, you cannot appropriately increase the landing distance during the technical cycle of running, and it is impossible to easily extend the landing buffering time."

"So that's it. We have completely taken the wrong path in this regard." Zhao Haohuan nodded after hearing this. He has long been no longer so surprised by Su Shen's various knowledge reserve abilities, and has even gradually become a natural one.

It’s not surprising that Su Shen knew, but it’s strange that Su Shen didn’t know.

"But we have tried it, but the results are not very good. Is it because you Asians can squat in Asia, but Omes are not prone to squat in Asia? Is it a physiological problem?" Randy also touched her chin and expressed her opinions.

The Omes are not easy to squat in Asia. Su Shen knows that this is not a problem for ordinary people. The athletes have sufficient flexibility and joint mobility. The Asian squat is not a problem. To put it bluntly, these things can be further opened through training and can be used. It does not mean that the Omes can't do anything in their lifetime. But Su Shen thinks this is not here and said: "I think the functional characteristics of the ankle joint and the strength have a greater impact on the ground buffering."

"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 ability of the triceps of the calf, etc. At the moment of landing cushioning, when the forefoot of the swing leg hits the ground in a way of slitting the ground, the forefoot quickly transitions to the whole foot due to forward and downward inertia. When the instep bends to a certain extent, if the athlete's talus is relatively larger or the talus is relatively higher from the sole of the foot, or the elastic deformation ability of the triceps tendon of the calf is relatively strong, then

In theory, the dorsal curve of the ankle joint can be reduced, forcing the soles of the foot to transition from the whole foot to the ‘credit card’ in terms of landing. After all, shortening the buffering time and accelerating the buffering speed is one of the functions of the ‘credit card landing technology’. At the same time, the elastic deformation of the calf triceps can store energy, use non-metabolic energy for the ankle joint to work, improve the efficiency of the ground, and improve the efficiency of running. So I think the focus of our subsequent training should be to overcome this technology, and we must first put it on the ankle and calf triceps.”

"Because the contraction force of the ankle joint is very important for the correct completion of the ground-stripping technology. At the moment of landing, the swing legs actively move backwards and downwards to form the forefoot of the swing legs to hit the ground in a fast way. If the muscle contraction force of the ankle joint is large, the force of the forefoot to hit the backwards can be increased, the horizontal speed of the foot when the foot hits the ground, the angle of the forward pedal angle can be increased, and the horizontal braking force of the ground facing the human body can be increased. At the same time, the foot supporting the legs can quickly change from the ground-stripping support to the "credit card ground-stripping support". On the premise of ensuring sufficient cushioning, the buffering time can definitely be shortened."

"I think there is also reference point." Su Shen clicked on another computer screen and said: "The latest research report in our laboratory is well known that in muscle mechanics, muscles are divided into three parts: contractile elements, tandem elastic elements, and parallel elastic elements. When the muscle contracts, the contractile elements first 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 will lengthen the tandem elastic elements. Only when the tandem elastic elements are stretched to a sufficient length can the change of force be measured at the end of the muscle. Since that is the case... look at this."

This chapter is not finished yet, please click on the next page to continue reading the exciting content later! "The flexor muscles on the legs have already appeared 15-20 ms before the foot hits the ground."

"What does this mean? It shows that the pulses sent by motor neurons to the muscles are earlier than the time of landing, and during this time the muscles have not had time to contract, and the length of the activated muscles is less than the balance length."

"When putting it on the ground, the ground reaction force the foot receives at the moment it lands is resistance, but this process plays a positive role in completing the entire action. Because the back pedal is the basis of forward movement, the force of the back pedal should be the continuation of the force of the forward pedal, and the buffer is the prelude to the ground. The buffer is essentially the braking of the body moving towards the support direction, and the buffer can pre-extend the muscles until the optimal initial length, thereby storing elastic properties and preparing for the rear pedal. The traditional viewpoint is that when cushioning against the ground, the biomechanical characteristics of the foot starting from the projection point of the human body's center of gravity moves above the ground. It is not noticed that running the human body during the sprint is in rapid movement, and the foot supporting the leg is the characteristics of the front soles of the feet to the whole foot and the ground support, followed by the heels of the heels to the forefoot pedal, so it is impossible to further understand the phenomenon of slowing down movement and accelerating movement during the ground cushioning."

"I didn't pay much attention to what you said." Randy seemed to have realized something, something that still troubled, had been "tricked" by Su Shen, and immediately asked: "So what can I do to further realize it."

It’s not surprising that Randy is not very clear. It’s mainly because at this time, there are not many researches on landing buffering and there are no subdivisions.

But after 2020, the segmentation has begun to be clearly divided.

"In order to reveal this problem, our laboratory divided the sprint landing buffering process into the early buffering stage and the late buffering stage. They use the position of the center of gravity projection point and the heel as the judgment criteria."

"Before and late stages?" Randy continued to ask, "Then, how to divide it."

"From the foot on the ground to the center of gravity of the human body to the vertical top of the heel, it is called the early buffering stage. At this time, the center of gravity of the human body is behind the support surface. The horizontal component of the support reaction force received is opposite to the direction of the human body movement, which acts as a resistance to the forward movement of the human body, and the human body slows down. From the projection point of the human body's center of gravity projection point vertically above the heel to the vertical top of the heel, it is called the late buffering stage. The main force of the human body to accelerate movement in the later stage of landing buffering is from the swinging legs that swing upwards ahead and moves opposite to the support legs. By acting on the ground, the support reaction force obtained by the human body."

"Can this be it? Damn it, why didn't I expect it?" Randy seemed to have a bright light in front of her eyes, and she wanted to slap her forehead and slap herself to death: "It's a pity that Ralph Mann is leading Liu Fujian, otherwise, this new wave of division of ideas would inevitably make him, the biomechanics expert, ecstatic."

"Then let's build a new model of the underground link chain." Randy said: "The existing ones have serious shortcomings and need to be modified."

"This model needs to be calculated and sufficient, and it may take one or two weeks..." As soon as Randy finished speaking, Su Shen waved his hand and said, "No, I can just sort it out during my lunch break. I'll bring it to you when I come here in the afternoon."

Randy:...

Fuck.

Although he knew that Su Shen was a "scientific research monster", he could rely on the current high-tech system that would take several weeks, so he said that he could do it by taking a lunch break at noon... Is this a human being?

However, he is the "paper output machine" in the field of sports in this era and the "absolute pioneer of technological innovation" in this era. Thinking of this, Randy could only feel that his heart had to calm down a little.

Because there is no need for comparison.

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

He had seen Ma Long, the arrogant old guy, who had seen Ma Long, almost recognize his "godson" on the spot when facing Su Shen.

But I have been to Ersha Island for less than two years and have learned more than I have grown up in Ersha Island, and I have to do it in a systematic way. I can’t figure out if it’s someone else’s money or if I make it myself.

"But it is still difficult to apply him to the curve." Su Shen also thought for a moment, frowned slightly, "Because during the running, the human body's movement speed is relatively slow and the movement posture is tilted to the curve, the foot that forms the inner leg of the curve is supported by the outer leg of the forefoot, and the foot that the outer leg of the curve is supported by the inner leg of the forefoot. If the whole foot hits the ground or the credit card hits the ground, the morphological characteristics of the talus of the supporting leg and the tibial surface of the supporting leg will inevitably change. Therefore, when the human body runs on the ground and buffers on the curve, athletes with good ankle joint strength have relatively more support forefoot; athletes with poor ankle joint strength have relatively more support forefoot due to limited support ability. If I can optimize this aspect in the future and use the curve, then my overall strength of the curve will definitely leap again."

"When the zenith star person is at that time, I will have a little more confidence."

Randy:...

Zhao Haohuan:...

Randy was shocked again that Su Shen was not only trying to understand this "credit card technology", but also trying to optimize and innovate again based on the original foundation.

That's it.

How could this kid be so idle? Which technology is in his hands? It is either upgraded or optimized.

Even with the latest "credit card landing", even the Americans themselves are still in the research stage, he has already started to work hard towards versions 3.0 or even 4.0 and 5.0.

It's simply perverted.

When I was with him, I didn’t dare to say that I was a “sports research coach” anymore.

What Zhao Haohuan was shocked was.

This guy Su Shen actually...

He also wanted to win and lose with that monster Bolt.

and.

Still on the most unlikely curve.

After seeing Bolt's horror, he still felt that he wanted to challenge him from the bottom of his heart, but he was not the one who talked about it with a slut. Zhao Haohuan felt... it was really terrifying.

Anyway, I, or the entire track and field industry, have been "shaken by the Tao heart" because of Bolt's sudden emergence.

Only him.

The heart of Tao is stable.

It hasn't changed at all.

The further one's mind went, Zhao Haohuan felt the "exaggeration" of Su Shen. This was an experience that could not be produced when his strength was not strong enough.

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

"Go step by step, and you can try to understand it as soon as possible."

Well? No, you guys? Aren't we?

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

"Ah? I, let's see if I can do it next month. If I do it, just use me as a human model research. It will definitely be twice the result with half the effort."

Next, next month...

Zhao Haohuan really wants to slap himself.

Why don’t you learn pancakes? Your damn curiosity.

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

The bell of 2009 is coming soon.

PS: Refund~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Chapter completed!