The so-called "credit card landing" technology is a type of landing technology.

Is there also a technique for landing on the ground?

Hey, don't say it, there really is.

It was proposed by a trainer in 2009, and began to evolve in the United States in 2012, and a large number of them appeared, of course, there are some who are born with it. For example, a certain "Athletics Holy Body", he is born close to this landing technique, you can talk about it, how can you say it.

If you want to cry, make trouble, and hang yourself, please come here and line up.

"Make ankle dorsiflexion of the foot before the foot lands, and the biggest pursuit is that the ankle dorsiflexion of the sprint foot is in the gap between the heel and the runway at the moment of the sprint foot, and it can only be stuffed into a credit card. I,. Zhou Bing read and read, and the whole person felt bad.

Nima, landing can only be stuffed into one credit card?

How thick is a credit card?

Isn't this Nima all close to "flying close to the ground"?

How could this human be able to accomplish it?

When you first heard it, you must have this expression and thoughts, after all, how many credit cards are there, are you talking about science or fantasy in this Nima?

Zhou Bing's words obviously made the people below also enter a stunned state, because this statement is too shocking.

Someone even found a credit card in their wallet, and then shook their heads after two strokes.

It seems that this is too exaggerated.

But only Randy knows that this theory does have a clue in the United States, but it has not yet become a thorough system, but I heard that the United States track and field team has begun to try this latest landing technology.

Su Shen looked at Zhou Bing and the people below, smiled, and asked, "What, do you think this is impossible, this can't be done?" ”

"No, Ah Tian, this credit card, no, even if you say that it would be better to put a Xinhua dictionary below." Zhou Bing was also worried that Su Shen was too exaggerated, and if he didn't do it later, his prestige on Ersha Island would be damaged, so he wanted to help Su Shen make a round.

In the end, they are good brothers who came up together.

Of course, Su Shen understood the good intentions, but he still had to say: "The so-called credit card landing technology is to pre-stretch the elastic components of the calf muscles and connective tissues that support and push the human body forward, stimulate the rapid stretch reflex in the neuromuscular system, and achieve the purpose of improving the rapid reaction strength and action speed of the muscles." ”

"At present, the two major landing techniques are the forefoot support technique: during the sprint run, after the swinging leg completes the forward swing action, the forefoot and toes are actively "scratched" to support the ground. and full ball support: During the sprint run, after the swing leg completes the forward swing action, the whole ball of the foot is actively supported on the ground. Su Shen patiently analyzed and compared the new technology to everyone below: "But what about the "credit card landing" technology? It is a more advanced landing technique born from the full sole technique, which is in the process of running in the middle of the sprint, the foot is off the ground, after the calf is folded, hook the toe and actively press down to support the moment, the ankle joint is compressed, and the heel is only a credit card distance from the ground. ”

"Once everyone understands the classification of these landing techniques, we can move on to the following topics." Su Shen changed the PPT picture on the big screen, and a simplified picture of three human bodies landing on the ground appeared on it: "From the image, it can be seen that the ankle joint points are more dense when the whole ball of the foot is on the ground. This reflects the long time that the feet stay on the ground in this technique. Although there is no vertical cushioning, the foot always decelerates from the ground to the push-off for a long time, and in the forefoot technique, although there is no dense ankle landing point in the full ball technique. However, at the moment of landing, when the forefoot forms a front support, the joint is in a relatively high position. Due to the high speed during the middle run, the instantaneous speed and force of the foot on the ground are relatively large, which causes the forefoot landing technique to inevitably have a downward cushioning of the ankle joint, and the transition to the back pedal stage when the maximum cushioning is reached. In this process, a reciprocating process of downward and then forward and upward movement is carried out, and the amplitude of cushioning depends on the strength of the athlete's ankle joint. ”

"What about in the 'credit card' landing technology? We can see that there is less cushioning when the foot hits the ground. This can be seen by looking at the distribution of ankle points. The distribution of points is not overly concentrated in a point area, and there is no buffering process up and down. It is characterized by an active transition to the back pedal after landing. As a result, the buffering time is much lower than the other two landing techniques. This shows that the "credit card" landing can better reduce the buffer time. I think the reason for this is that the toe hook elongates the gastrocnemius and soleus muscles in advance, and at the moment of touching, the stretch reflex accelerates the forward roll of the knee joint, thus shortening the landing time. ”

"We can compare the data model to make an ideal state, the three modes of landing angle and ground departure angle." Su Shen tapped on the keyboard, and several sets of data of the three modes popped up, and said: "We can see the forefoot landing technique, the landing angle is 66.379, the ground angle is 65.411, the forefoot landing technique, the landing angle is 68.423, the ground clearance angle is 65.898, the 'credit card' landing technique is 75.189, and the ground clearance angle is 63.566. ”

"What do these three sets of data represent?" Su Shen said: "The landing angle of the 'credit card' landing technology is 75.189. It is the largest landing angle of the three techniques. So what does a big landing angle mean? A large landing angle means that the landing distance is relatively close, and the time to reach the maximum buffer is the shortest, so the loss of speed is correspondingly minimal. The ground clearance of the "credit card" landing technology is 63.566, which is also the smallest of the three landing techniques. This shows that the center of gravity of the "credit card" landing technology has good forwardness in the process of pedaling, the acceleration distance of the center of mass in the horizontal direction is long, the acceleration is more obvious, and the ups and downs of the center of mass are small, and the speed loss is small. The other two techniques are a little worse, such as the full foot technique, where the angle of landing on the ground and the angle of the ground off the ground is almost the same. The landing angle is small, and the forefoot technique has a larger landing angle than the full sole technique, and this technique has an obvious "ground-grabbing" action on the forefoot, but it is limited to the forefoot. Compared with the "credit card" landing technology, the forefoot touches the ground first, and the landing time is earlier than the "credit card" landing technology, and the center of mass position is relatively lagging behind, so compared with the "credit card" landing technology, its landing angle is smaller, so in this way, there will also be a deceleration effect. This is because the landing angle is the angle between the line between the landing support point and the center of mass and the ground. The size of the landing angle directly affects the ground distance, and the distance between the ground projection point and the support point in the vertical direction of the center of mass at the moment of support before landing. ”

"In addition, let's take a look at the comparison of the ankle cushioning angles of the three sets of landing techniques." Su Shen clicked, and three sets of data popped up on the big screen, namely:

Technical type: The amplitude of the ankle angle cushioning when the maximum cushioning of the ankle angle when landing on the ground

The whole ball of the foot 122.514 92.685 29.856

Forefoot 109.717 90.027 19.690

Credit card 109.299 94.498 15.801

Obviously, the ankle angle of the "credit card" landing changes the least amount of angle when it hits the ground to the maximum cushion. Reduces the amount of time spent cushioning the ankle and makes it easier to transition to the press and stretch phase and prepare for the push. It not only reduces the buffering time, but also facilitates the acceleration of the horizontal direction. During the sprint, the "credit card" landing technique can reduce the cushioning amplitude of the ankle joint, and its technical characteristics are to press the ankle before landing, and the angle of the ankle joint before landing is minimized, so as to reduce the amplitude of ankle motion in the front support phase. ”

"It can be seen from this that in the whole support process." Credit card "landing technology is the best technology." Because the ankle angle is small when landing, it not only reduces the buffer time but also reduces the fluctuation of the body's center of gravity, and the ankle angle is large when leaving the ground. It shows that the pedal extension is sufficient, and the angle is large to indicate that the direction of the pedal is horizontally forward, which reduces the upward undulation of the body, thereby reducing the undulation of the body's center of gravity, and its technique is better than the other two techniques. ”

"Sprinting is the quintessential speed and strength event. The magnitude of the horizontal velocity of the centroid is an important factor affecting the performance of sprinting. In the training of sprinting, strive to achieve maximum horizontal speed and reduce vertical speed. The vertical velocity of the centroid has a greater influence on the horizontal velocity. The large vertical velocity causes the center of gravity to fluctuate too much, which affects the velocity in the horizontal direction, resulting in a loss of velocity in the horizontal direction. On the premise of ensuring that the forward horizontal velocity is large enough, the velocity in the vertical direction should be reduced to create favorable conditions for obtaining a larger horizontal velocity. ”

"Plus the 'credit card' landing technique exhibits high horizontal velocity and small vertical velocity. It is more conducive to the horizontal acceleration of the centroid. At the same time, it can also greatly strengthen the rigidity of the ankle + fascial strength, you say we don't train this, what do you train. ”

……

"It's that simple, everyone understands." Su Shen said with a smile: "After completing this, I have an optimized version behind me, and you can also understand him as an advanced version, and when you have learned the children's shoes of this step, you can proceed to the next step of learning." ”

Zhou Bing: ......

Hukai: ......

Zhang Peimeng: ......

Yuan Guoqiang: ......

Audience: ......

Only Xie Zhengye shook his head a little, and opened his mouth to break the deadlock and said: "It feels so difficult, Mr. Su, what should I do if I can't learn?" ”

Su Shen smiled warmly and innocently, and said, "I can't learn it, it's very simple." ”

"In the future, I can just be a sparring partner and a substitute for the people who have learned it."

"Absolute fairness, justice and openness."

All the athletes in the audience suddenly fell into a wail again.

ps: The technology is difficult to write, everyone supports a lot, ┭┮_┭┮~~~~~~~~~~~~~~!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I'm already doing my best, woo woo~~~~~~!!!!!!!!!!!!!!!!!!!! Ask for votes, ask for support~~~~~~~~~~~~!!!!!!!!!

7017k