Rewind the clock to yesterday afternoon. Pen "Fun" Pavilion www.biquge.info

Jurgen Klopp is in his office, reviewing the results of the team-wide fitness report he has just gotten.

Next to him, the whole body of the strength and conditioning staff is there, and Klopp reads a person's report and passes it on to the strength and conditioning coaches.

He was staring at a man's report right now.

"Oliver. He said.

Oliver Bartlett came over.

"Look at this. Klopp pointed out the chart on the report to Bartlet. That's a graph showing the player's heart rate changes at different speeds.

"Zhou Yi's?" asked Bartlet.

"Hmm. ”

Bartlet picked up the report and read it carefully.

After reading this page, I will turn down.

After flipping through it, he took the report and said to Klopp: "I remember when he first entered the youth team, we did a similar physical test for him...... The report is still with me, waiting for me to pick it up. ”

After saying that, he walked out of Klopp's office directly, and the other colleagues all looked up at the back of Bartlett hurrying away, a little strange.

Klopp didn't explain, but moved on to the next report.

It wasn't long before Bartlett returned to Klopp's office with a report.

Then he flipped the two reports to the same chart page, and then tapped on the report: "Well, there is a significant change in heart rate. His heart rate dropped. ”

Heart rate is an important indicator for athletes, especially when it comes to physical fitness.

There is a relatively simple comparison, that is, professional athletes, especially those in endurance, will have a lower heart rate than the average person. This is because the athlete has been professionally trained and the body and heart have adapted to adjust it.

So by checking the changes in a person's heart rate when exercising, it is easy to see if he is a qualified athlete or if he has received professional training.

This point has also been verified by Zhou Yi.

When he first came to Dortmund, he had a medical check-up, and that was a medical check-up for joining the team.

In fact, during that physical examination, Zhou Yi had already felt the professionalism of European football clubs.

In the past, he thought that the physical examination was a simple test of height, weight, endurance, speed, etc.

But it's actually far more complicated than he thought.

The team doctor asked him about his medical history, whether he had had any previous surgeries, and his family medical history should be truthful. Because Zhou Yi has not played for other clubs before, Dortmund cannot check his injury history with Zhou Yi's previous club, and can only rely on Zhou Yi to be conscious, if Zhou Yi wants to hide something, it is difficult for Dortmund to know.

However, in addition to catching a cold, Zhou Yi has no history of injuries, and he has not undergone surgery.

Then Zhou Yi's living habits were asked all over again, such as what time to go to bed every day, what time to get up, what is the quality of sleep, whether it is good or not, whether you dream, you don't dream much, whether you have insomnia, whether you drink coffee, whether drinking coffee will have any effect on sleep, what is the frequency of drinking coffee, usual eating habits, light and heavy tastes......

This was followed by cardiac examinations, including electrocardiogram (ECG) test, cardiac echo test, etc.

Urine tests are also done to check for protein and ketones to avoid problems such as diabetes.

This is followed by an examination of the muscles and joints, where the physiotherapist assesses the range of motion of each joint and compares it with normal values.

Muscle strength is also very important, for example, there is an imbalance in the muscles of the legs, which can affect a player's ability to run long distances.

Blood draws are also essential. Draw once before the physical examination and again after the physical examination.

The results of the blood test can show the player's kidney function, vitamin intake, and changes in these indicators during the exercise.

The ability to exercise aerobically and anaerobically is a very important indicator for football players, and there will be no shortage of tests in this regard. Zhou Yi was asked to test his limits as much as possible in this kind of test.

At that time, Zhou Yi was wearing an oxygen mask similar to a pilot, and his body was covered with electrodes, and he ran very the treadmill, and the cadence and treadmill track angle were constantly changing.

This kind of running can analyze Zhouyi's aerobic metabolism, which is the ability to use how much oxygen is used during exercise.

In addition to these physical aspects of the examination, there are also dental examinations and intelligence tests.

These things were all things that Zhou Yi hadn't thought of before, but he had all experienced them in the physical examination.

And now Bartlett wants to compare the results of Zhou Yi's physical examination when he first joined the team and the results of the current physical examination.

In just eight months, Zhou Yi's heart rate has changed significantly, whether it is during exercise or rest, his heart rate has slowed down compared to before.

And this is an important indicator of physical fitness.

To put it simply, when the human body is doing strenuous exercise, the metabolic rate will increase dramatically, and the heart will have to use its reserve power to meet the body's increased metabolic rate by increasing the stroke volume per minute. The so-called stroke volume per minute is the amount of blood ejaculated once when the ventricles on one side of the heart contract and bulge.

Blood is responsible for supplying oxygen to organs and tissues throughout the body, so stroke volume per minute can also be understood as the output energy of a person every time his heart beats.

The work done by the piston of a car engine is similar to the stroke per distraction of a human being.

The higher the power of the engine, the more power it makes, the more the heart beats, the greater the energy output, and the better the athletic ability.

During exercise, cardiac output increases by a factor of four to six or more per minute compared to a quiet state when not exercising.

Generally speaking, when ordinary people exercise vigorously, they will increase their cardiac output by increasing their heart rate, which is why ordinary people feel their hearts beat fast when they exercise vigorously. Because the heart does not contract and expand at an accelerated rate, there is no way to increase the oxygen supply.

Normally, the amount of bleeding in the heart is about 70 to 80 milliliters per pacing, and after the amount of each stroke increases several times during exercise, the heart will be under a huge load. Therefore, ordinary people without professional training cannot maintain this kind of high-load exercise for a long time, which can easily lead to cardiac arrest and other accidents, and in severe cases, sudden death.

But the heart can be changed through training.

Long-term high-load endurance training will cause the heart chambers to enlarge and the ventricular walls to thicken, and the heart rate will also decrease.

Players are always in a state of sympathetic nervous excitement during training and competition - the activity of the sympathetic nervous system mainly ensures the physiological needs of the human body in a state of tension - and at the same time, reflexivity causes a continuous increase in vagus nerve tone - vagus nerve innervates the sensation, movement and secretion of glands in the heart and other organs.

The benefit of slowing the heart rate for exercise is that it can reduce the oxygen consumption of the heart muscle, after all, the heart also needs oxygen to supply energy. If the heart beats too fast, it consumes more energy and oxygen, so that less energy is supplied to the rest of the body. That's why it's important to make your heart rate slower.

The heart rate slows down, myocardial oxygen consumption decreases, and at the same time prolongs diastole, increases diastolic coronary perfusion time, and increases myocardial oxygen supply.

According to statistics, the heart rate of professional players is generally lower than that of ordinary people, and their heart rate is 40 beats per minute when they are quiet or sleeping, which is not a special phenomenon.

So you can tell a player's level of movement from the heart rate.

Zhou Yi's heart rate changes indicate that his athletic ability has increased, or specifically his endurance has increased. Because the slow heart rate is basically related to endurance exercise.

This is actually very normal, anyone who has been trained by systematic science can lower the heart rate, which is a manifestation of the body's self-regulation.

However, some people are more self-regulating and adaptable, while others are poorer.

Now Zhou Yi's two physical examination reports are in front of Klopp and Bartlet, and they find that Zhou Yi's physical fitness has improved quite a lot.

You must know that eight months ago, Zhou Yi was still an amateur rookie who had never received professional system physical training, and after eight months, his physical condition has greatly improved. This improvement is greater than Zhou Yi's muscle strength - there is also a muscle strength check in the two physical examinations, and Zhou Yi's progress in this area is relatively small.

This shows that Zhou Yi is a person who has a lot of potential in terms of physical fitness.

This is a good thing for Klopp, which makes him more optimistic about Zhou Yi's future.

Because of Zhou Yi's future in his mind, all abilities are based on abundant physical fitness.

Whether it is Zhou Yi's style of play or Klopp's own Dortmund, they all require a lot of physical support.

If Zhou Yi is a player who increases his physical strength slowly no matter how he trains, and is not known for his physical fitness, then Klopp's evaluation of Zhou Yi will be lowered, and his decision to buy him personally may have been wrong.

While the club doesn't have much to lose, not every young player will eventually become a talent. But after seeing Zhou Yi's talent, Klopp will regret it if he fails to become a talent in the end. Because Zhou Yi's talent is not something that any talented player can have......

There are thousands of midfielders in the world, and there are not only a few world-class midfield playmakers, but only Xavi himself can play like Xavi.

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"His strength training is based on the average of the whole team, and there is no need for extra. Klopp started talking to the entire strength and conditioning staff, but it was mainly to Wangle, who was in charge of strength training.

Wangle nodded: "Okay." Anyway, no matter how much he trains, that kid can't become a bodybuilder like me, he has a different muscle type, maybe that kid is a marathon runner. ”

Generally speaking, long-distance runners and marathon runners rarely see strong muscle maniacs, they tend to be thin, with slender hands and feet, and they don't look like many muscles, but they often have very good endurance. In particular, Kenya's long-distance runners, who look like they are malnourished, can dominate the long-distance running world. This is certainly not because Kenyans are generally undernourished......

'But we can ask for more from his physical training. Klopp turned to Bartlet.

"No problem. In terms of fitness, I think Zhou Yi is a talented player. Bartlett said.

Gifted athletes are able to maintain a higher training intensity and complete a larger training volume than the average athlete. Because they have a shorter recovery period than the average athlete.

Subsequently, in the discussion between Klopp and the physical coaching staff, Zhou Yi's personal physical training plan was released.