Chapter 155 Professional

Actually, Kiester didn't need to worry too much about Zhou Yi, because for the Borussia Dortmund youth team, Zhou Yi wasn't a completely unfamiliar newcomer.

After all, Zhou Yi had played against them before, and in that match, he had two assists and a goal, leaving a very deep impression on everyone in the Borussia Dortmund youth team.

Whether it was Zhou Yi's strengths or weaknesses.

This could be seen from the training content arranged for Zhou Yi by the youth team coach, Eckel.

Every day, in addition to the whole team training, Zhou Yi had to do more physical training than other players, especially stamina training.

Zhou Yi's biggest shortcoming now was stamina, which didn't meet the requirements of a professional player at all.

Of course, Zhou Yi wasn't a professional player yet, but becoming a professional player was his goal.

The youth team didn't have a full-time stamina coach, so Zhou Yi's stamina training was handled by Mr. Oliver Bartlett, the stamina coach of the first team.

From this, it could also be seen that Klopp's emphasis on Zhou Yi was not just lip service.

You had to know that Oliver Bartlett was a stamina training expert highly valued by Borussia Dortmund, and it wasn't simple for him to give special training to a youth team player.

In Zhou Yi's first stamina training lesson, Bartlett didn't immediately arrange a stamina training plan for Zhou Yi, but asked Zhou Yi a question with his arms crossed: "How do you understand stamina, young man?"

After listening to Kiester's translation, Zhou Yi didn't understand why the coach was asking this question, but he still honestly replied: "It's endurance."

"Wrong." After hearing the answer, Bartlett shook his head.

"Wrong?" Zhou Yi was very surprised. He had always understood stamina this way. Stamina was equal to endurance. Players with good stamina had good endurance and could run longer and farther on the field. Was there anything wrong with that?

Moreover, not only did he understand it this way, but in football games, FM and Pro Evolution Soccer... understood it this way too.

How could this be wrong?

Seeing Zhou Yi's surprised look, Bartlett asked him: "I heard Tim say that you've been insisting on going for a morning run every day?"

Zhou Yi nodded proudly. With his personality, being able to persist for so long was indeed something to be proud of.

But Bartlett didn't think so.

He directly rejected Zhou Yi's approach of increasing stamina by jogging: "Although jogging at a balanced pace in fields and parks can improve jogging ability, such training cannot improve your stamina in games. Stamina is not just the simple concept of 'endurance'. Remember, football is a sport that includes many sprints and high-intensity anaerobic movements, interspersed with low-intensity aerobic recovery periods to prepare for the next round of high-intensity operations."

Zhou Yi opened his mouth wide after listening to Kiester's translation.

Seeing Zhou Yi's expression, Kiester asked, "What's wrong?"

"Uh... what the coach said is great, but... can he say it again?"

Kiester knew that Zhou Yi didn't understand, so he said to Bartlett, "Can you explain it in detail? Without so many professional terms..."

"In simple terms, it's that you will make actions like sprinting, shooting, jumping, tackling, or intercepting the ball in the game. These are all high-intensity anaerobic movements. Your body needs to consume adenosine triphosphate, or ATP for short, and use some glucose to supply muscles to perform these high-intensity movements," Bartlett explained.

Although there were still many professional terms, Zhou Yi understood this time, which was that the body needed to consume that something called ATP and glucose to make movements.

"Then, in the low-intensity stages of the game, such as walking, jogging, and standing, the body will recover, so that ATP will be replenished, and lactic acid will also be eliminated. Lactic acid is what causes you to feel sore after a large amount of exercise. Lactic acid is metabolized aerobically. This is why people breathe heavily after slowing down or stopping strenuous exercise."

Bartlett continued to explain. He combined it with practical examples. Even though he was still full of professional terms, Zhou Yi could understand it.

In simple terms, it was that you needed to rest after strenuous exercise, so that your body could recover and gain the energy to continue strenuous exercise.

"The time interval for a player to resume high-intensity exercise depends on the speed at which his ATP is replenished, the amount of lactic acid that is metabolized, and the completion of other electrolytic processes related to muscle contraction. And recovery is an aerobic process. The higher a player's aerobic capacity, the faster his recovery speed, and the higher the frequency of full-speed running. Therefore, the longer he can play at his best without feeling tired."

"So, what we call stamina in football is not just the ability to run for a long time, but the ability to recover quickly. Football is not a marathon. You don't need to run non-stop for ninety minutes. On the contrary, there will be a lot of frequent anaerobic exercise. If your body can't recover quickly from anaerobic exercise, then you naturally won't be able to last too long in the game. You will easily feel tired."

"After understanding what the concept of stamina in football is, you will understand why I said that jogging in the park can't improve your stamina in the game. Because improving your jogging ability won't allow you to quickly recover energy in the game."

Zhou Yi was already dumbfounded, but this time it wasn't because he didn't understand, but because he was shocked by the professionalism of the professional football club.

Yes, after listening to Bartlett's words, he only had two words in his mind: professional!

These people were professionals!

He used to think that running 10,000 meters with sandbags tied to him would improve his stamina, but now he knew that was nonsense.

Moreover, not only him, but judging from the "10,000 meters every day" slogan of the Haigeng Spring Training, Chinese football was not very professional...

No wonder the level of Chinese football couldn't go up.

If the people involved in Chinese football were so unprofessional, what were they thinking about when they wanted to break out of Asia and go to the world...? That was indeed a pipe dream.

The Chinese team had participated in the World Cup finals once in history, but that time it was just good luck. It didn't mean that the strength of Chinese football had improved. Everyone had seen what happened later, which fully showed that Chinese football hadn't found the right direction yet.

※※※

After that, Zhou Yi further saw the professionalism of European giants.

After Bartlett explained to Zhou Yi what the concept of "stamina" in football was, he didn't immediately start training Zhou Yi, but instead tested Zhou Yi. According to him, this was to test the distribution ratio of fiber types in Zhou Yi's muscles.

According to the previous explanation about stamina, it could be seen that football players constantly cycled between anaerobic and aerobic exercise in the game. And the human body has two types of muscle fibers corresponding to these two types of exercise.

Large fast-twitch muscle fibers can generate a large amount of tension very quickly, but cannot continuously generate such a large amount of tension during multiple contractions. Smaller slow-twitch muscle fibers generate less tension at a slower rate, but can contract repeatedly and continuously.

Therefore, fast-twitch muscle fibers can generate a large amount of anaerobic energy for the rapid generation of tension. When players sprint, jump, tackle, and shoot, they need explosive power, and it is anaerobic energy that plays a role in the body. And slow-twitch muscle fibers can generate a large amount of aerobic energy for repeated contractions.

The distribution of fast-twitch and slow-twitch muscle fibers is largely determined by genetics, which is the so-called "talent."

Some people are born to run fast, which is because there are more fast-twitch muscle fibers in their bodies.

It is impossible to change the distribution ratio of muscle fibers through acquired efforts, so it is necessary to first figure out which type of muscle fiber Zhou Yi has more of, so that targeted training arrangements can be made.

And it is not what everyone thinks, Zhou Yi's stamina is not good, then directly start training content to enhance stamina.

How to specifically test Zhou Yi's muscle fiber distribution?

In fact, it is also very simple, just test muscle endurance. First, use equipment to test the maximum strength of Zhou Yi's muscle contraction. For example, if you want to test the muscle fiber ratio of a part of the leg muscles, let Zhou Yi sit on an adjustable leg press machine, and then let him forcefully push the front baffle, and then gradually increase the weight, observe Zhou Yi's situation, if Zhou Yi can't push a certain weight, then the last weight he can push is the maximum strength of this muscle contraction.

Then take 80% of this maximum strength as the test strength standard. Let Zhou Yi repeat training on this strength and see how many times he can persist.

If it is greater than fifteen times, it means that slow-twitch muscle fibers account for a higher proportion in this part of the muscle. If it is less than five times, it means that fast-twitch muscle fibers account for a high proportion.

Just test it part by part like this.

Finally, Bartlett came to a conclusion.

The ratio of Zhou Yi's fast-twitch and slow-twitch muscle fibers is 54:46.

He has fewer slow-twitch muscle fibers, so his stamina is poor.

This result disappointed Zhou Yi: "Doesn't that mean my poor stamina is innate, and there's no hope of improving it?"

Bartlett shook his head: "If that's the case, what do we stamina coaches do? We stamina coaches are specifically responsible for cultivating and enhancing your stamina. You have to know, young man. Speed is innate, but stamina can be improved through acquired training."

He patted Zhou Yi on the shoulder: "So don't worry, you definitely won't always only be able to play half a game."

Zhou Yi quickly defended: "It's seventy minutes."

But Bartlett didn't care about the difference.

"It's about the same." He shrugged and curled his lips. "Okay, that's it for today."

Zhou Yi was very surprised: "No training?"

"Wait for me to go back and make a targeted training plan for you before starting training." Bartlett said. "We will start formal training tomorrow. Today, you should take a good rest first, don't be too tired. You flew over from China and started training. In addition to showing your attitude, there is no benefit to doing so. Remember, rest is the first step in stamina training. If you don't rest well, don't even think about training well."

Bartlett took the notebook containing all of Zhou Yi's muscle data and left. Zhou Yi was still in a daze, savoring his last sentence.

Rest is the first step in stamina training...

This was the first time he had heard of this.

But... it seemed very reasonable!

Professional!

"Mr. Bartlett is just this attitude, he speaks very directly, and he doesn't like nonsense. So don't take it to heart, Zhou Yi." Kiester thought that Zhou Yi was stunned by Bartlett's words and quickly comforted him.

Zhou Yi shook his head: "How could I, Mr. Kiester. Having a coach who directly points out my problems saves everyone's time. I'm happy that I'm too late. Don't worry, Mr. Kiester. I'm not a glass heart!"

"That's good." Kiester laughed. "Okay, let's leave too. Have you forgotten that you are moving today?"

Zhou Yi was stunned for a moment before he remembered that there was such a thing!

The club had approved his application to live in Wagner's home, and today he was moving from the hotel to his teammate Mark Wagner's home!

※※※

ps, there is another update in the afternoon, please give me your monthly votes!

!