Ersha Island.
Because Su Shen had to directly integrate his upper body into the existing ground-grabbing system this time, he needed to spend more time.
Otherwise, formal adaptive high-speed training can already begin now.
But this is also a new topic for Randy and Ralph Mann.
Because they don't understand now how to integrate these perfectly, remember it is perfect integration, not mechanical application, the kind of kneading that can only have the opposite effect. Although they instantly understood the feasibility of this after reading what Su Shen wrote, it was not easy to do it best, how to do it most reasonably, and where the scientific data were.
There are no ready-made examples.
Su Shen began to have in-depth exchanges with them. This is part of true scientific research, which requires the application of a large number of biomechanics and physics formulas.
…
"Ground support can be divided into three stages: front kicking, vertical kicking, and back kicking. We all know the front kicking process. The support point of the foot is in front of the projection point of the center of mass of the body, and the force of the ground facing the person plays a decelerating effect. How can we draw the conclusion The largest "braking point" and the largest "pushing point"? Then let's do a calculation. If the front support is cushioned on the ground and the toes fall 7cm in front of the projection point of the body's center of mass, the maximum "braking" phenomenon will occur."
"The tip of the toe falls 7cm in front of the projection point of the center of mass of the body?" This is Ralph Mann's main field. He immediately asked: "Why is it 7cm? Do you have any basis? Su?"
These people are real industry experts and professors. They cannot just pull off a few tiger skins and become a big banner.
Without truly scientific theories and calculation formulas, I'm afraid I won't be able to convince them.
"Due to the back-pedaling process, the support point of the foot is behind the projection point of the center of mass of the body..." Su Shen said: "At this time, the force of the ground facing the person has an acceleration effect. And because the force of the ground facing the person pushes the human body forward, The main driving force of running, so we can calculate it like this————The speed of the center of mass of a person during running is the speed of the person running. It is the speed of the person relative to the ground. It is regarded as the implicated speed, represented by v1. The heart is facing the ground, and the direction is approximately forward. During running, the athlete presses the thigh, extends the calf, and drives the calf and foot to touch the ground. The speed of the foot relative to the center of mass of the human body is regarded as the relative speed. V2 represents the foot facing the center, and the direction is backward. Below..."
"Then, according to the principles of mechanics, it should be like this." Su Shen quickly wrote on the paper: "Absolute speed v3 foot to ground = v1+v2."
"And because the forward speed of the center of mass, v1, center to ground, is greater than the backward and downward ground-grabbing speed of the foot, v2, foot to center, so the direction of v3, foot to ground, is generally toward the front and downwards."
"Since the direction of v3 is generally toward the front and downwards, the angle between the speed direction of the v2 foot to the center and the v1 center to the ground should be much greater than 90 degrees. Therefore, the size of the v3 foot to the ground is generally much smaller than the speed and direction of the v1 center to the ground. Therefore, the ground-moving action makes the speed of the foot against the ground smaller than that without the ground-moving action. Since the ground-moving action makes the foot-to-ground speed smaller than without the ground-moving action, when the front pedaling is buffered, the ground-moving action causes the foot to move faster than the ground-moving action. The front pedaling resistance of the interaction between the foot and the ground is small, which is equivalent to adding an extra driving force. This is what we are doing now, but if..."
"What about adding an upper limb chain link to the lower limb chain link?"
"From the analysis of human body dynamics, when the front support of the foot touches the ground, the forces acted on by the human body include gravity g, the elastic force n of the ground to the foot, the friction force f of the ground to the foot, and the resistance of the air to the body f, o is the point of action of the ground on the feet, c is the center of gravity, b is the point of action of the resistance of the air on the body. The human body is only affected by the friction force f of the ground on the feet and the resistance f of the air on the body in the horizontal direction. Generally, the resistance of air on the body is The resistance f of the body is small. At this time, if an upper limb chain link is added to the lower limb chain link, that is, extra shoulders, elbows, and arms, can it increase the speed of the foot to the ground, that is, when v3 is small, the forward pedaling The resistance, that is, the friction force f between the ground and the foot at this time, will also be smaller?"
"Keep talking, Su." Ralph Mann has gradually understood that he is indeed an expert in mechanics in this field.
"Then the ground-grabbing will be more 'fulfilling' at this time."
"Also according to the momentum theorem, the speed loss of the human body in the horizontal direction is the deceleration reduction."
"The driving force of landing will increase accordingly at that moment."
"Similarly, with v3, the front pedaling resistance will be smaller. Will it further reduce or even eliminate the "braking" phenomenon during landing?"
"Here's the link diagram of my new land-grabbing chain. The top and bottom are connected. The formula and calculation process are as follows..."
Su Shen wrote quickly, and dense calculations began to appear in front of the two people. The most terrifying thing was that in the process of seeking verification, Ralph Mann actually...
No problems found at all.
God, this guy doesn't have the head of Jesus in track and field.
Otherwise, how could this be possible?
This is horrible.
Grain spoilage
one person.
He actually completed the optimization of technical projects that required a large team and a lot of time to demonstrate and verify by himself.
all of these.
Ralph Mann looked at it, and it took less than an hour in total.
this……
Ralph Mann is a scientific athlete, and he has never really admired anyone in this aspect in his life, but this time, he had to admire him. Because Su Shen told him with facts, what he thought was impossible before, now...
All possible.
"Genius idea. Genius design. Genius argument." Ralph Mann said "genius" three times in a row, which is enough to reflect the state of mind of this American biomechanics expert professor at this moment. and mentality.
The essential……
He was barely eighteen years old.
terrible.
"Professor Ralph? Professor Ralph? Are you listening to me?" Su Shen shouted several times. When he saw that Ralph Mann did not respond, he had to push the latter with his hand.
"I said, old man, why are you distracted? Are you getting older and losing energy?" Randy joked.
"What do you know?" Ralph Mann said angrily: "You are not a person in the field of biomechanics. You have no idea what Su means. If this thing is released, it is likely to promote technological innovation in the entire track and field world. and new technological developments.”
"Give me a few weeks, no, give me a few days, and I will complete the preliminary verification. If you want to publish this paper by then, I will sign it for you. No, I will write an introduction for you." Ralph. Man rarely loses his temper, but this time, he really lost his temper.
After all, such a person has exceeded his expectations.
When the tolerance level is exceeded, it is natural that one can no longer remain calm.
"But these theories have just been proposed, how long will it take for you to put them into practice?" Randy raised his concerns.
After all, theory is theory and practice is practice. Is there any experience to follow? Is there enough time for the remaining half of winter training?
Su Shen nodded, with a calm expression on his face, and said: "Don't worry, it's no problem, the rest of the practice is enough."
"I will understand all the technical movements before the end of winter training."
"By the way, Coach Randy, my diamond squat seems to have some movement patterns that need to be corrected. Then you can help me use the equipment to analyze it."
"Also, my optimization plan for the 30 to 40 meters ahead, which is specifically aimed at improvement, will be as agreed last time."
"I still have time left to do this."
Randy:…
Ralph Mann:…
God, does this guy eat technology as easily as he eats burgers?
After listening to what Su Shen said, the two of them were already in a complete mess.
ps: Here come the veterans, there are more, we will arrive at the battlefield in five seconds~~~~
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