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

Is there any technology to land?

Oh, don't say anything, there is really.

It was proposed by American trainers in 2009. It began to evolve in the United States in 2012 and appeared in large quantities. Of course, there are also natural ones. For example, a certain "track and field holy body" was born to approach this landing technique. Tell me, what do you think you can say.

If you want to cry, make a fuss, and hang yourself, please come here to queue up.

"I dorsiflexion of the ankle joint before the foot lands. The biggest pursuit is to dorsiflexion of the ankle joint in the gap between the heel and the track when the foot lands, and I can only put a credit card in it. I, damn it." Zhou Bing read, and felt bad.

Damn, can only one credit card be stuffed into the landing?

The credit card is only as thick as it is.

Isn’t this all close to “flying against the ground”?

How could this human be accomplished?

When I first heard it, you must have this expression and thought. After all, there are only a lot of credit cards. Are you talking about science or fantasy?

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

Someone even found a credit card in his wallet, then gestured twice, and kept shaking his head.

It seems that this is a bit exaggerated.

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

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

"No, A 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 did not do it later, and his prestige on Ersha Island was damaged, so he wanted to help Su Shen smooth things over.

They are good brothers who came up together.

Of course, Su Shen understood the good intentions, but he had to say what he should say: "The so-called credit card landing technology is to pre-stretch the muscles and connective tissue elastic components of the back of the calf that support and push the human body forward, stimulate the rapid stretching reflex in the neuromuscular system, and achieve the purpose of improving the muscle's rapid response strength and movement speed."

"The two major landing techniques are the forefoot support technology: during the running process, after swinging the legs to complete the forward swing, actively "slide the ground" with the forefoot and toes. As well as the full foot support: during the running process, after swinging the legs to complete the forward swing, the whole foot supports the whole foot to actively touch the ground." 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 technology derived from the full foot technology. During the running process, the foot pedals off the ground, and the calf is folded, and the toes are tightened and the ankle joint is pressed. There is only one credit card distance between the heel and the ground."

"After everyone understands the classification of these landing technologies, we can continue to the following topic." Su Shen changed the PPT picture on the big screen, and three simplified pictures of human body landing appeared on it and said: "From the image, we can see that the ankle joints are relatively dense at the time of landing. This reflects that in this technology, the foot stays on the ground for a long time. Although there is no vertical buffering, the foot always slows down from landing to pedaling, and the time is long. In the forefoot technology, although there is no such thing as the foot.

The forefoot technology is densely grounded ankle joint. However, when the forefoot forms a forward support at the moment, the forefoot is in a relatively high position. Due to the faster speed during the run, the instantaneous speed and strength obtained by the foot are also relatively large. This causes the forefoot landing technology to have an ankle joint downward cushioning, and when it reaches the maximum cushioning, it transitions to the rear pedal stage. In this process, the reciprocating process of moving downward and then forward and upward is performed. The amplitude of buffering depends on the athlete's ankle strength."

"What about the 'cred card' landing technology? We can see that the foot has less buffering after landing. By observing the distribution of the ankle nodes, we can see that the distribution of points is not too concentrated in a point area, nor is there a up and down buffering process. Its characteristic is that after landing, it is actively turned into the rear pedal process. Therefore, its buffering time is far lower than the other two landing technologies. This shows that the "cred card" landing can reduce the buffering time better. I think the reason is that the toes are raised, which pre-extends the gastrocnemius and soleus muscles. The moment the touching ground is, due to the effect of the tension reflex, the forward rolling of the knee joint is accelerated, thereby shortening the landing time."

"We can compare the ideal state of the data model, the three modes of grounding angle and grounding angle." Su Shen tapped the keyboard and popped up several sets of data from the three modes, saying: "We can see the forefoot landing technology, the grounding angle is 66.379, the grounding angle is 65.411, the forefoot landing technology, the grounding angle is 68.423, the grounding angle is 65.898, the ‘credit card’ landing technology is 75.189, and the grounding angle is 63.566."

"What do these three sets of data represent?" Su Shen said: "The landing angle of the 'cred card' landing technology is 75.189. It is the largest of the three technologies. So what does it mean? The large landing angle means that the landing distance is relatively closest, and the question is the shortest when reaching the maximum buffer. Therefore, accordingly, the loss of its speed is the smallest. The grounding angle of the "credit card" landing technology is 63.566, which is also the smallest grounding angle among the three landing technologies. This shows that during the pedaling process, the center of gravity of the "credit card" landing technology has a good forward direction, the acceleration is long in the horizontal direction, and the acceleration is more obvious, and the center of mass fluctuates slightly up and down, and the speed loss is small. The other two technologies are worse, such as the full one.

The angles of the foot technique are almost the same as those of the ground angle. The ground angle is small, and the forefoot technology is larger than the full foot technique. This technology has a clear "slide" action, but is limited to the forefoot. Compared with the "credit card" landing, the forefoot first landing, and the landing time is earlier than the "credit card" landing technology. At this time, the center of mass position is relatively lagging, so compared with the "credit card" landing technology, the grounding angle is smaller, which will also produce a deceleration effect. This is because the ground angle is the angle between the connecting point of the ground support point and the center of mass and the ground. The size of the ground angle directly affects the ground distance. The distance between the ground projection point and the support point in the vertical direction of the center of mass before landing."

This chapter is not over, please click on the next page to continue reading! "In addition, let's take a look at the comparison of the ankle cushioning angles of three sets of landing techniques." Su Shen clicked, and three sets of data popped up on the big screen, namely:

Technical type Ankle angle cushioning amplitude when the ankle angle is maximum when the ankle angle is landed

Total foot 122.514 92.685 29.856

Forefoot 109.717 90.027 19.690

Credit Card 109.299 94.498 15.801

"It is obvious that the angle of the ankle joint angle in the "credit card" landing is minimal when it hits the ground to the maximum buffering. It reduces the time spent on ankle joint cushioning, which is more conducive to transition to the pedal and extension stage and prepares for pedal and extension. It not only reduces the cushioning problem, but also facilitates the acceleration movement in the horizontal direction. During the running during the sprint, the "credit card" landing technology can reduce the cushioning amplitude of the ankle joint. Its technical feature is to press the ankle before the grounding, which minimizes the ankle joint angle in the ankle stage, thereby reducing the ankle movement amplitude in the front support stage."

"From this we can see that during the entire support process, the "credit card" landing technology is the best technology. Because the ankle angle is small when landing, it not only reduces the buffering time but also reduces the ups and downs of the body's center of gravity. It is large when off the ground. It indicates that the pedal is sufficient, and the angle is large, indicating that the direction of the pedal is horizontally forward, reducing the ups and downs of the body, thereby reducing the ups and downs of the body's center of gravity. Its technology is better than the other two technologies."

"Sprinting is a typical velocity force event. The magnitude of the horizontal speed of the center of mass is an important factor affecting the performance of the sprint. In the training of sprinting, strive to obtain the maximum horizontal speed and reduce the speed in the vertical direction. The vertical speed of the center of mass has a greater impact on the horizontal speed. A larger vertical speed causes the center of gravity to fluctuate too much, which affects the speed in the horizontal direction and causes the speed in the horizontal direction. On the premise of ensuring that the forward horizontal speed is large enough, the speed in the vertical direction should be reduced to create favorable conditions for obtaining a larger horizontal speed."

"In addition, the 'credit card' landing technology shows a very high horizontal speed and a smaller vertical speed. It is more conducive to the horizontal acceleration of the center of mass. At the same time, it can greatly enhance the rigidity of the ankle. Fascial strength. You said we don't train this, what should we train."

...

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

Zhou Bing:...

Hukai:...

Zhang Peimeng:...

Yuan Guoqiang:...

All:...

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 it?"

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

"In the future, it's enough to be a sparring and substitute for those who have learned it."

“Absolutely fair, just and open.”

All the athletes immediately fell into a wail again.

PS: It is difficult to write technology, please support it, ┭┮﹏┭┮~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Chapter completed!