Du Liang obviously knows his shortcomings. www.biquge.info As a high-achieving student who can be admitted to Tsinghua University, Du Liang is not the kind of person with a simple mind and developed limbs, on the contrary, he has a high IQ and is very good at finding and thinking about problems.

Tsinghua University does not have a physical education department, even if a high-level athlete wants to enter Tsinghua University, he must take the high school entrance examination normally, and then enter through the way of admission with sports specialties, and the drop in scores is not very large.

Of course, the admission score line is different in each province, and there is a big difference. 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 brings together a group of academic tyrants. Li Dai doesn't need to say too much, just need to explain the key parts, and the athletes will be able to understand what Li Dai means.

At this time, Du Liang was already stunned by Li Dai's words just now.

"He told me all my flaws, how did he know about it? He only arrived yesterday, and yesterday afternoon was the most regular training, could it be that he had already seen my technical flaws yesterday afternoon? The extensor hip muscles and ankle muscles contract too early, which is a very subtle shortcoming, I also took the training video, went to the sports human science laboratory, and asked Professor Zhang to analyze it with a computer system. ”

At this moment, Du Liang put away his contempt for Li Dai, and asked very sincerely: "Coach Li, then how can I improve my shortcomings?" ”

"I've got a short-term training plan for you, take a look!" Li Dai handed an A4 piece of paper to Du Liang.

Du Liang hurriedly took it with both hands and looked at it carefully.

"Is this a half-high leg run?" Du Liang asked.

"Yes, it's a half-high leg run in small steps. Have you been exposed to it before? Li Dai asked.

"No, but in a journal, I saw it once." Du Liang replied.

"Your question, according to the traditional training method, will probably use the training method of small stride, but small stride is very useful for beginners, and for athletes like you who have mastered a certain amount of sprinting skills, the effect is not obvious." Li Dai opened his mouth to explain.

"Yes, I've been using small steps to solve the problem of the hip extension and ankle muscles contracting too early, but it has hardly worked." Du Liang nodded hurriedly, he felt that Li Dai had spoken to his heart.

Li Dai continued: "So I choose the training method of half-high leg raising and small steps, which can better emphasize the action and speed of ankle landing, on the basis of the traditional small step running action, it is required to raise the thighs higher, and the height of the swinging leg swing is about 30 degrees to 40 degrees from the center level, and the hips are quickly extended when the feet fall, and the feet are quickly pushed down by extending the hips to promote the feet to land quickly." After a while, I will personally teach you and train you in the technique of this movement. ”

"Thank you, Coach Lee!" Du Liang's face was sincere, at this time he was already convinced by Li Dai!

Being able to identify problems is only the first step, being able to solve them is the most important thing. Du Liang knew his technical flaws, and tried to solve them through training, but the effect was unsatisfactory.

However, Li Dai can come up with a solution to the problem, which makes his bargaining chips even bigger and convincing Du Liang.

When several other people saw this scene, their minds became active again.

"Although this Coach Li is very young, he seems to have some ability, he can actually see Du Liang's shortcomings, and he can also propose a plan to improve his shortcomings. I underestimated this Coach Li before. ”

"Coach Li said it very well, it seems that there is no need to worry about him arranging the training plan blindly."

"Is this Coach Li really capable, or is it a coincidence? Let's take a second look! ”

At this time, Li Dai clicked the second name: "Xin Xiaotian, you are out of the ranks!" ”

Xin Xiaotian immediately stepped forward, and he looked at Li Dai with interest, as if he wanted to hear what other insights Li Dai would have to say.

"Xin Xiaotian, your problem is that in the process of running, you only pay attention to raising your legs, and do not think about sending your hips, and you lack initiative in hip extension adaptability, which also causes you to have insufficient forward push distance." Li Dai said.

Xin Xiaotian smiled disdainfully, and he retorted: "This technique of mine is to make the calf of the swinging leg quickly drive back before hitting the ground, so that you can get more pushing power." And you say that I lack initiative in hip extension, that's because I am running at high speed, and the forward swing is high enough! This technique of mine makes the forward pedal less resistant. ”

If it were an ordinary athlete, he probably wouldn't refute the coach like this, but Tsinghua students are all proud of the sky, Xin Xiaotian's usual academic performance is very good, and the sprinting level Tsinghua sprint team is also ranked second, second only to Niu Guohong, this kind of person who has been among the best from childhood to adulthood, is born with the bonus of pride and self-confidence, and naturally dares to refute Li Dai.

"Ha, Xin Xiaotian refuted that Coach Li, there is a lot of excitement to watch now."

"Xin Xiaotian usually seems to have self-taught courses related to sports training, and in terms of sports training, his theoretical knowledge is very rich, even those master's student teaching assistants, sometimes they can't talk about Xin Xiaotian."

"Look at how Coach Li should answer, it's the mule or the horse that leads it out for a walk! If you can't handle Xin Xiaotian, this Coach Li will be embarrassed today. ”

The rest of the athletes had their own thoughts, but they all showed a lively look.

Li Dai was not in a hurry, he continued to say in a slower tone: "When you are running, the front swing is not just high enough, but the front swing is too high!" I think you usually do a lot of high-leg-raising running exercises, right? ”

"How do you know?" Xin Xiaotian's expression changed slightly, and he was asked a little unconvinced by what Li Dai said.

"The training of high leg lift running has obvious positive and negative effects on sprinting techniques, and this training can indeed correct the shortcomings of the forward swing is not high enough, but for sprinters, they bend their hips and swing movements, and at the moment of completing the final quota, the height of the swing leg is limited to a certain range, not higher and higher. The key is to go far! ”

Li Dai said, a hand began to compare: "When running at high speed, the hip joint will have a more obvious twist, the running technique you are using now is to lose the necessary and reasonable forward pedal distance, in exchange for a reduction in resistance, but this will have a certain lead in the starting stage, but it also causes the loss of step length when running on the way, and at the same time your attention will focus on the landing angle, which will inevitably cause the hip, knee and ankle joints to stiffen, which is the tension of the knee joint." ”

Li Dai paused, he found that Xin Xiaotian had completely listened to his words, and he was still in thought.

"The most important thing is that your technical action of raising your legs will cause physiological effects, such as hip retraction and pelvic sitting, which will affect stride length and running speed." Li Dai paused, and then said: "So this technical characteristic of yours must be changed!" ”

When the words "must be changed" were spoken, Xin Xiaotian had completely lost the unruliness he had just now, and he showed the same shocked expression as Du Liang.

"What Coach Li said makes sense!" Xin Xiaotian was already impressed by Li Dai.