After the old man came, Fei ran at least 5 times, and every time he returned to the starting point, he saw the old man's expression was strange. She thought she had done something wrong, and when she was about to run again, she was suddenly startled by the old man's sudden shout.

"What did Grandpa do?"

"I know why you're stagnant." Old Man Mo suddenly realized, he couldn't find any mistakes after watching Fei run three times, he almost found a reason to run away just now.

As a result, when Fei ran 100 meters for the second time, he found that Fei had speed and endurance, but the only drawback was the lack of the ability to maintain top speed.

Many people tend to run 100 meters when they rush out, and the speed is the greatest at that moment. A lot of people are running and running and suddenly their speed slows down, and some people keep accelerating and accelerating. Fei was an exception, she didn't pick up much speed throughout the race, but kept the fastest start from the start to the finish at once.

Speed is not a single performance quality, it is a complex combination of strength, speed, coordination, and endurance, including reaction ability, acceleration ability, ability to maintain top speed, overall coordination ability, etc. One of the most influential is the ability to accelerate and maintain top speed. The higher the level of an elite athlete, the longer the acceleration distance, and the greater the ability to maintain high speeds.

Her level is very high, but her ability to maintain high speed is not strong, and it can even be said that she is weak.

"High-speed acceleration?" Fei listened confused, she had speeded up, why didn't she speed up?

Old Man Mo didn't know how to describe it, so he turned his gaze to Mo Lin, who was still being punished, "Are you okay?" Hurry back and run back. ”

Mo Lin was already speechless about the old man's behavior, I still have 600 meters Okay, how can it be so fast.

"You don't need to finish running, give you 30 seconds to come right over." The old man shouted, hurry up! After the run, it's time to go home and take a nap.

This sentence is more useful than anything else without running, and the distance is still 100 meters away and the acceleration begins.

"Look at Mo Lin's swinging arm, his initial speed can basically be said to be slow to death, you pay attention to the last 50 meters. His leg pace cadence follows what you know about him, like which rhythm. Old Man Mo pulled Fei to the side and saw Mo Lin's fastest acceleration at the clearest angle.

"He's used to pushing his pace to the limit of his run, but he's still in control of not stagnation in the air." She has been used to Mo Lin's movements since she was a child, what does the old man mean by asking?

"The eight of you started in exactly the same way, and even the pace at which you rushed out at the beginning was the same. That's the problem. Old Man Mo patted Fei's calf and said:

"You guys started in the same position, and you started faster than everyone else. But you don't know how to adjust, I just said that speed is not a single performance, it is a complex combination of speed, power coordination and acceleration ability. Yu Xin is all-round, but each event has its mutual limitations, "People who are used to long-distance running often can't show speed in sprinting, because long-distance running is about endurance; People who are used to sprinting are often the weakest in long-distance running, because of the lack of endurance, the biggest fear of track and field athletes is that the calf muscles are tense, and injuries will lead to weakened explosiveness.

And as I just said, Fei will not adjust. He had seen Yu Xin use this starting position to run a sprint, but she didn't look pleasing to the eye like Fei, on the contrary, Fei's movements looked too smooth.

Yu Xin took advantage of the rushing speed of the starting position, and added strength on the original basis, resulting in an action that seemed to be unsmooth, but it was faster than expected.

In order to help Fei break through, the old man specially called up the video of Fei's only time running the fastest speed of 10 seconds 98 seconds and the video on the day of the race, and he couldn't find any difference.

Why is the running time 0.1 second different in the same posture? The old man was puzzled.

But today, I saw that he was also gradually showing signs of it. The posture is the same, but there is a difference in the power of her calves.

In the video that ran out of 10 seconds and 98 seconds, it is not difficult for experienced people to find that Fei's calf muscles in the video are not tense to run, and she subconsciously accelerates when she runs halfway; On the other hand, in this video of 11.08 seconds, Fei's calf muscles are tense from the beginning, and they have not accelerated, and they have maintained the acceleration of the impact until the end.

The gap came out, and in addition to the calf problem, there was also an acceleration problem. But what made Old Man Mo run away was that he was able to knock out all the sprint women who had trained him for so long in North America without adding speed.

Is it a matter of talent? No, it's an unfair issue, God is too partial.

"I can't control my calf, it's going to be tight, can I still pull it away?" Fei is also very innocent, there is no way, her calves naturally tense as soon as she started running.

"Ah Yu said, you always train yourself, right?" The old man looked at the lively mood, he had seen those who asked for reduced training, but he rarely saw those who took the initiative to increase training and added two hours as soon as they were added.

Fei nodded lightly.

"Actually, you can't improve with additional training, so we don't need to make any training plans! Everyone just trains and trains and it's done. The old man sighed, sure enough, it's not a family that doesn't enter the door, she and Mo Lin are really similar.

"Proper training and total relaxation is the way to help sports progress, your calves are often tense should be that you are not fully relaxed after each training, a lot of training and a small amount of relaxation is the reason why you can't improve."

This time it was Mo Lin's turn to agree, he agreed very much with what the old man said, and finally said something useful.

"That means I can't train?" Fei was a little disappointed, because in her concept, only training could make people improve.

"You can't say that, when you can control your calf muscles by yourself, then you can train more. Before that, my grandfather, as a direct instructor, suggested that it was best not to increase the pressure on myself. "Old Man Mo ordered for the first time as a direct instructor.

Mo Lin nodded in agreement, he was just thinking about how to bring people back on time and not let them be trained, but the old man said.

"So follow me obediently during this time, don't train yourself, I'll help you relax after training."

"Huh!"

Seeing that the two began to fight again, the old man instantly had a feeling that he was redundant, and turned around and left the sports field with his crutches, the 80-year-old light bulb was so bright, no one cared about him so angry!