Du Liang obviously knew his shortcomings. As a top student who was admitted to Tsinghua University, Du Liang is not a simple-minded person with well-developed limbs. On the contrary, he has a high IQ and is very good at identifying and thinking about problems.
Tsinghua University does not have a physical education department. Even high-level athletes who want to enter Tsinghua University must take the college entrance examination normally, and then enter through the admission of students with sports specialties with reduced scores. However, the drop in scores will not be huge, and you can enjoy it. Admission with a reduced score of 30 to 50 points is already very good. The situation of entering college with a score of 100 or so in the college entrance examination will never appear in Tsinghua University's special sports recruitment.
Of course, the admission scores are different in each province, and they vary greatly. But it is undeniable that if you want to enter Tsinghua University, you must be the most outstanding talent in your province.
Therefore, the sports department of Tsinghua University also has a group of academic leaders. Dai Li doesn't need to talk too much. He only needs to explain the key points so that athletes can understand what Dai Li means.
At this time, Du Liang was already stunned by what Li Dai just said.
"He told me all my flaws. How did he know? He just came here yesterday, and he had the most routine training yesterday afternoon. Could it be that he had already figured out my flaws yesterday afternoon? Is there a technical flaw? The hip extensor muscles and ankle muscles contract too early. This is a very subtle flaw. I also took the training video and went to the Sports Human Science Laboratory to ask Professor Zhang to use the computer system to analyze it. I later found out that Coach Li could actually see it with his eyes!"
At this moment, Du Liang put away his contempt for Dai Li and asked sincerely: "Coach Li, how can I improve my shortcomings?"
"I have prepared a short-term training plan for you, take a look!" Dai Li handed an A4 paper to Du Liang.
Du Liang hurriedly took it with both hands and looked at it carefully.
"Is this a half-high trot?" Du Liang asked.
"Yes, it's a trot with the legs raised half high. Have you ever done it before?" Dai Li asked.
"No, but I saw it once in a journal." Du Liang replied.
"Your question, if you follow the traditional training method, you will probably use the trot training method, but trot is very useful for beginners. For athletes like you who have mastered certain sprinting skills, the effect is not obvious. ." Dai Li opened his mouth to explain.
"Yes, I have been using the trot training method to solve the problem of premature contraction of the hip extensor muscles and ankle muscles, but it has almost no effect." Du Liang nodded quickly. He felt that Li Dai had mentioned his own problem. In my heart.
Li Dai continued: "So I chose the half-high leg-raising trot training method, which can better emphasize the movement and speed of the ankle landing. On the basis of the traditional trot, it requires a higher thigh lift. High, the height of the swing leg is about 30 to 40 degrees from the center horizontal line. When the foot falls, quickly extend the hip, and press down by extending the hip to promote the foot to land quickly. In a while, I will personally teach you, Perform technical training on this movement.”
"Thank you, Coach Li!" Du Liang said sincerely. At this time, he was convinced of Dai Li!
Being able to find the problem is only the first step, being able to solve the problem is the most critical. Du Liang knew his technical shortcomings and tried to solve them through training, but the results were unsatisfactory.
But Li Dai could propose a solution to the problem, which increased his leverage and convinced Du Liang.
When several other people saw this scene, their minds became active again.
"Although Coach Li is very young, he seems to have some abilities. He can actually see Du Liang's shortcomings and come up with ways to improve them. I underestimated Coach Li before."
"Coach Li's words are very good. It seems that you don't have to worry about him arbitrarily arranging training plans."
"Is Coach Li really capable, or is it just a coincidence? Let's take a closer look!"
At this time, Li Dai called a second name: "Xin Xiaotian, come out!"
Xin Xiaotian immediately took a step forward. He looked at Dai Li with interest, as if he wanted to hear what other insights Dai Li would have to say.
"Xin Xiaotian, your problem is that during running, you only pay attention to raising your legs instead of raising your hips. You lack initiative in hip extension adaptability, which also causes your front pedaling distance to be insufficient." Li Dai He spoke.
Xin Xiaotian smiled disdainfully, and retorted: "My technique is to make the lower leg of the swinging leg drive backward quickly before landing, so that greater ground pushing force can be obtained. And you said that I The lack of initiative in hip extension is because my forward swing is high enough when running at high speed! This technique of mine can reduce the resistance of the front pedal."
If you are an ordinary athlete, you probably won't refute the coach like this, but Tsinghua students are all the proud ones. Xin Xiaotian's academic performance is very good, and his sprinting level is also ranked second in the Tsinghua sprint team, second only to Niu Guohong. People who have been among the best since childhood are born with pride and self-confidence, so they naturally dare to refute Dai Li.
"Ha, Xin Xiaotian refuted that Coach Li, now there's something exciting to watch."
"Xin Xiaotian seems to have taught himself courses related to sports training. In terms of sports training, he has a wealth of theoretical knowledge. Even those master's student assistants sometimes can't compare to Xin Xiaotian."
"Let's see how Coach Li answers the call. It's a mule or a horse that's being led out for a walk! If we can't handle Xin Xiaotian, Coach Li will be embarrassed today."
The remaining athletes had their own thoughts, but they all looked like they were watching the excitement.
Dai Li was not in a hurry. He continued to say in a slower tone: "When you are running, your front swing is not just high enough, but your front swing is too high! I think you should usually do more Let’s practice running with your legs high, right?”
"How do you know?" Xin Xiaotian's expression changed slightly. He was convinced by what Li Dai said and asked unconvinced.
"The training of high-leg running has obvious positive and negative effects on sprinting technology. This training can indeed correct the shortcoming of the front swing not being high enough, but for sprinters, their hip flexion and swing movements must be completed after completing the final quota. In an instant, the height of the leg swing is limited to a certain range, rather than getting higher and higher. The key is to swing it far!"
As Dai Li spoke, he began to make gestures with his hands: "When running at high speed, the hip joint will have a more obvious twist. The running technique you are using now will result in the loss of the necessary and reasonable forward pedaling distance. In exchange for reduced resistance, this will give you a certain lead at the starting stage, but it will also cause a loss of stride length during running. At the same time, your attention will be focused on the landing angle, which will inevitably cause damage to the hip, knee and joint joints. Stiffness in the ankle joint is due to tension in the knee joint."
Li Dai paused for a moment. He found that Xin Xiaotian had completely listened to his words and was also deep in thought.
"The most important thing is that your technical action of raising your legs high will cause physiological effects, such as hip joint retraction and pelvic sit-down, which will in turn affect step length and running speed." Dai Li paused. After a pause, he continued: "So this technical characteristic of yours must be changed!"
When these four words "must be changed" were spoken, Xin Xiaotian was no longer as unruly as before, and he showed the same shocked expression as Du Liang.
"What Coach Li said makes sense!" Xin Xiaotian was already impressed by Dai Li.