The Su God of the Reopening of the Sports Arena

Chapter 891 God damn has technology in landing? ? ? (Ask for votes!)
The so-called "credit card landing" technology is a kind of landing technology.

Does the special landing also have technology?
Hey, don't tell me, there really are.

It was proposed by American trainers in 2009, and it began to evolve in the United States in 2012, appearing in large numbers, and of course some are born with it.For example, a certain "sacred body of track and field", he is naturally 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.

"Do the ankle dorsiflexion of the foot before the foot hits the ground. The biggest pursuit is the dorsiflexion of the ankle joint in the gap between the heel and the track when the sprint foot hits the ground. Only a credit card can be stuffed in. Fuck me." Zhou Bing Reading and reading, the whole person feels bad.

Nima, only one credit card can be inserted into the floor?

How thick is a credit card.

Isn't this Nima close to "flying close to the ground"?
How could this human being complete it?

When I first heard it, you must have had this expression and thoughts, after all, credit cards are only so much, so damn, are you talking about science or fantasy.

Zhou Bing's words obviously stunned the people below, because this statement is really shocking.

Someone even took out a credit card in the wallet, and then shook his head after making two gestures.

It seems that this is too exaggerated.

But only Randy knows that this theory has indeed taken shape in the United States, but it has not yet become a complete system. It is said that the American track and field team has already begun to try this latest landing technology.

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

"No, Ah Tim, 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 exaggerating, and he didn't do it later. Damaged, so I want to smooth things over for God Su.

After all, they are good brothers who came together.

Of course Sushen understands the good intentions, but I have to say: "The so-called credit card landing technique is to pre-stretch the calf muscles and connective tissue elastic components that support and push the human body forward, and stimulate the rapid traction in the neuromuscular system." To achieve the purpose of improving the muscle's rapid reaction strength and movement speed."

"The two current landing techniques are the forefoot support technique: during sprinting, after the swinging leg completes the forward swing, use the forefoot and toes to actively "grab the ground" for support. And full foot support: sprinting During the running on the way, after swinging the leg to complete the forward swing, the whole sole of the foot is actively supported." Su Shen patiently analyzed and compared the new technology for everyone below: "But what about the "credit card landing" technology? It is A more advanced landing technique born out of the full-foot technology is that during a sprint, the pedals leave the ground, and after the calf is folded, the toes are hooked up and the toes are actively swung forward and pressed down for support. The ankle joint is pressed tightly, and the heel and the heel The ground is only a credit card away."

"After everyone understands the classification of these landing techniques, we can continue with the following topic." Su Shen changed the PPT picture on the big screen, and three simplified pictures of human bodies landing appeared on it: "From the picture, we can see In the full-foot technique, the ankle joints are denser at the moment of landing. This reflects that in this technique, the foot stays on the ground for a long time. Although there is no vertical cushioning, the foot always decelerates from landing to kicking off. It takes a long time. In the forefoot technique, although there is no intensive ankle joint point in the full-foot technique. But at the moment of landing, when the forefoot forms a front support, the stepping joint is at a relatively high position. Due to the speed during running It is faster, and the instantaneous speed and force obtained by the foot are relatively large, which results in the downward cushioning of the ankle joint in the technique of landing on the forefoot. When the maximum cushioning is reached, it will transition to the stage of kicking back. In the reciprocating process of moving down and then forward and upward, the buffering range depends on the strength of the athlete's ankle joint."

"What about the 'credit card' landing technique? We can see that there is less cushioning after the foot hits the ground. It can be seen by looking at the distribution of ankle points. The distribution of points is not too concentrated in one area, and there is no cushioning process up and down. .Its characteristic is that it actively turns into the back kicking process after landing. Therefore, its buffer 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 is that the toe hook From the beginning, the gastrocnemius and soleus muscles are pre-stretched, and at the moment of touching the ground, due to the stretch reflex, the forward roll of the knee joint is accelerated, thereby shortening the landing time."

"We can compare the ground angle and departure angle of the three modes under the ideal state made by the data model." Su Shen tapped the keyboard, and several sets of data of the three modes popped up, saying: "We can see Forefoot landing technology, the ground angle is 66.379, and the ground clearance angle is 65.411. Forefoot landing technology, the ground angle is 68.423, and the ground clearance angle is 65.898.

"What do these three sets of data represent?" Su Shendao: "The landing angle of the 'credit card' landing technology is [-]. It is the largest landing angle among the three technologies. So what does a large landing angle mean? A large landing angle means that The distance to the ground is relatively short, and the time to reach the maximum buffer is the shortest, so correspondingly, the loss of speed is the smallest. The ground clearance angle of the "credit card" landing technique is [-], which is also the smallest of the three landing techniques. A. This shows that in the process of kicking and extending, the center of gravity of the "credit card" landing technique is better forward, the acceleration distance of the center of mass in the horizontal direction is longer, the acceleration is more obvious, and the up and down fluctuation of the center of mass is small, and the speed loss is small. The other two techniques are It is worse, for example, the angle of landing and the angle of departure of the full-foot technology are almost the same. Limited to the forefoot. Compared with the "credit card" landing technique, the forefoot touches the ground first, and the landing time is earlier than the "credit card" landing technique, and at this time the position of the center of mass is relatively lagging behind, so compared with the "credit card" landing technique, its landing angle If it is smaller, it will also produce a deceleration effect. This is because the landing angle is the angle between the line connecting the ground support point and the center of mass and the ground. The size of the landing angle directly affects the grounding distance. The moment of support before landing on the ground , the distance between the ground projection point and the support point in the vertical direction of the centroid."

"In addition, let's take a look at the comparison of the ankle joint buffer angles of the three landing techniques." Su Shen nodded, and three sets of data popped up on the big screen, namely:
Technical type Ankle angle cushioning range when the ankle angle is maximally cushioned when landing
Full sole 122.514 92.685 29.856
Forefoot 109.717 90.027 19.690
Credit card 109.299 94.498 15.801
"Obviously, the angle of the ankle joint in the "Credit Card" touches the ground has the least angle change when it hits the ground and reaches the maximum cushioning. It reduces the time spent on the ankle joint cushioning, and is more conducive to the transition to the kick-extension stage and prepares for kick-extension. Not only reduces It is not only cushioning, but also conducive to acceleration in the horizontal direction. During sprinting, the "credit card" landing technology can reduce the cushioning range of the ankle joint. minimized, thereby reducing the range of ankle motion during the anterior stance phase."

"It can be seen that during the whole support process, the "credit card" landing technique is the best technique. 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. Fully stretched and a large angle indicates that the direction of kicking and stretching is horizontal and forward, which reduces the upward fluctuation of the body, thereby reducing the fluctuation of the body's center of gravity, and its technique is better than the other two techniques."

"Sprinting is a typical speed and strength project. The horizontal speed of the center of mass is an important factor affecting the performance of sprinting. In the training of sprinting, strive to obtain the maximum horizontal speed and reduce the speed in the vertical direction. The influence of the vertical speed of the center of mass on the horizontal speed Larger. Larger vertical speeds lead to excessive fluctuations in the center of gravity, which affects the speed in the horizontal direction and causes speed loss in the horizontal direction. On the premise of ensuring that the forward horizontal speed is large enough, the vertical speed should be reduced Speed, creating favorable conditions for obtaining greater horizontal speed."

"In addition, the 'credit card' landing technique shows high horizontal speed and small vertical speed. It is more conducive to the horizontal acceleration of the center of mass. At the same time, it can also greatly enhance the rigidity of the ankle + fascia strength. You said that we do not train this , what are you training for?"

……

"It's that simple, everyone understands it." Su Shen said with a smile: "After finishing this, I will have an optimized version later, and you can also understand it as an advanced version. After learning this step Children's shoes, you can proceed to the next step of study."

Zhou Bing: ...

Hu Kai: ...

Zhang Peimeng: ...

Yuan Guoqiang: ...

Audience: ...

Only Xie Zhengye shook his head and broke the deadlock by saying, "It feels so difficult, Mr. Su, I can't learn what to do?"

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

"In the future, it will be fine to serve as a sparring partner for those who have learned it."

"Absolutely fair and just and open."

All the athletes in the field suddenly fell into a burst of wailing again.

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(End of this chapter)