"Aye, at the start of the 100-meter track, contains key technologies that determine the outcome. Among them, there is a world of difference between curved arm starting and straight arm starting. Behind this is complex and profound scientific principles."

"From a biomechanical perspective, starting with a bent arm is a highly optimized starting method. When you start with a bent arm, your arms bend angle is determined based on the optimal mechanical model of muscle force. The short arm structure formed by the bend of the arm is like installing a set of efficient levers on both sides of the body. At the start, the force generated by muscle contraction can be transmitted to the body with higher efficiency through this short lever, driving the body forward."

"From muscle kinematic analysis, in this posture, the muscle groups such as the deltoid muscles, biceps and triceps of the shoulders are mainly involved in the swing arm, and their contraction direction is more consistent with the swing arm direction, reducing the decomposition of force during the conduction process. At the same time, due to the short force arm, the muscles can generate a larger angular velocity with only a small contraction amplitude, thus making the swing arm faster. This series of muscles work in concert allows the force of the swing arm to explode in an instant, providing a powerful initial acceleration for the start."

"Looking at the shift of the body's center of gravity, starting with a curved arm can move the center of gravity forward more quickly and steadily. During the start, the movement of the body's center of gravity is one of the key factors that determine the efficiency of speed improvement. Starting with a curved arm shortens the radius of the swing arm, the body can obtain acceleration along a vector direction closer to the horizontal direction at the moment of starting, just like laying a high-speed channel for the movement of the center of gravity. This movement of the center of gravity not only reduces unnecessary energy loss in the vertical direction, but also allows the body to enter a high-speed running posture faster, just like a rocket quickly adjusting its posture to obtain the best flight trajectory at the beginning of launch."

"In sharp contrast, straight arm starts. When straight arm starts, straight arm leads to too long force arm. According to the principle of torque, under the same muscle force, the longer the force arm, the greater the torque generated, but this requires more energy to overcome the resistance moment, and the efficiency of force transmission will be significantly reduced. In this case, the shoulder muscles need to spend more energy to start the swing arm action, and during the swing arm, the force will be dispersed on the long arm and cannot burst as concentratedly as the curved arm. From the perspective of the motion trajectory, when straight arm starts, the swing arm action will cause the body's center of gravity to fluctuate significantly in the vertical direction. This is because the movement of the swing arm swing arm will produce an upward parting force, causing unnecessary displacement in the upward and downward direction, increasing energy loss. This waste of energy is like the frequent brake and start of the car during driving, which seriously affects the increase in the starting speed."

"So the starting mode of the curved arm is more conducive to the rapid coordination of the nervous system. Since the rhythm of muscle contraction and dilation of the curved arm movement is relatively simple and efficient, the nervous system can more accurately control the order and strength of the muscles. However, due to the complex movement and the transmission of force is not direct, the nervous system needs more time and energy to adjust when controlling the muscles to work together, which will lead to obvious disadvantages at the moment of starting every second."

"In short, there are significant differences in multiple scientific dimensions such as biomechanics, muscle kinematics, body center of gravity transfer and neuromuscular control. These differences determine that in the key link of 100-meter start, curved arm start has an unparalleled advantage and is an inevitable choice for pursuing ultimate speed."

"Of course...this prerequisite is."

“You need to be able to really master this starting technique.”

"It is very difficult to master this technology thoroughly. This is why among many black players, there are not many people who master this technology, and its technical difficulties are quite complicated."

"So if you can't master this technique, it's better not to use it if you are proficient."

This is what Su Shen said to him before. In fact, at that time, Su Shen was already looking forward to when he could master this technology.

Use this younger body now.

A more scientific body.

Create a better body.

Healthier body.

Want to see if he can do it.

Unexpectedly, I was not yet 20 years old.

He has already transformed this technology into actual combat. This is more than 10 years earlier than his last life.

very good.

let me see.

Have you really mastered it or fake it?

Aye.

Su Shen looked ahead.

Stare at the starting position.

The eyes are like torch fire.

Bang--------

Xie Zhengye started.

Located on the front side of the upper arm, it is the key muscle for starting a bent arm.

When starting, the biceps contract strongly, pull the forearm and bend it inward, so that the arm completes the arm flexing movement, providing the arm traction force for the body to start forward.

The moment Xie Zhengye started, the rapid contraction of his biceps allowed his arms to quickly enter a bent state, preparing for subsequent acceleration movements.

Secondly, it is located deep on the biceps. It works in concert with the biceps to strengthen the strength of elbow flexion. During the starting process, it assists the biceps in completing the flexion movement, increasing the strength and stability of the flexion of the arm, ensuring that the arm can bend quickly and vigorously, and providing better support for the body's start.

Then, the brachioradialis muscle is located on the outside of the forearm and is also one of the main flexor muscles of the forearm. Its contraction helps the forearm bend better, and when starting, it cooperates with the biceps brachii and brachialis to control the bending angle and speed of the forearm, making the movements of the arm more coordinated and efficient.

Then to the deltoid anterior bundle, connecting the shoulders and upper arms, it contracts moderately when the bent arms start, helping to stabilize the shoulder joints and assisting the arms to lift forward and upward. This not only helps the arms to enter the bent state faster, but also increases the amplitude and strength of the arm swing, providing additional power for the body to accelerate.

This chapter is not over, please click on the next page to continue reading! Then to the supraspinatus muscle, which is located above the shoulder, mainly responsible for the abduction and uplift of the shoulder joint. When the bent arm starts, the contraction of the supraspinatus muscle can help maintain the stability of the shoulder joint, ensuring that the shoulder joint will not be shaking or dislocation during the lifting and bending of the arm, so that the arm movements can proceed smoothly.

In addition, other muscles of the forearm, such as pronating teres, wrist flexors, finger flexors, etc., although they have relatively little role in starting the flexor, they will also participate in the movements. The contraction of these muscles can help adjust the posture of the hand, make the palm better hold the starting device, increase the friction between the hand and the starting device, and provide better support for the body's forward start.

Finally gathered together to activate the core.

Including muscles in the abdomen, back and pelvic floor.

When the bent arms start, the core muscles will contract to maintain the stability of the body, effectively transmitting the strength of the legs to the upper body, so that the strength of the upper and lower bodies can work together better.

Also, because the contraction of the abdominal muscles can help maintain the upright posture of the body and prevent the body from tilting forward when starting; the contraction of the back muscles can help keep the body straight and increase the body's explosive power.

Then.

A complete bent arm start.

It's done.

Break out of the starting line.

Compared with straight arm starting, the latsimum dorsi is connected from the bottom of the back to the upper arm. When starting, it contracts to pull the arm back and lower, while the pectoralis major contracts to pull the arm forward and down. These two muscles work together to make the arm swing forward and backward in a straightened state. Under this swing method, the force generated by muscle contraction needs to be transmitted through a longer force arm, resulting in dispersion of the force. In order to generate sufficient swing torque, the muscle needs to contract more significantly and consume more energy.

Now……

The starting of the bent arm mainly relies on the contraction of the flexor muscles such as the biceps, brachialis and brachioradialis to complete the arm flexor movement. When these muscles contract, the direction of force acts on the bend of the arm in a more concentrated manner, so that the arm can swing quickly and forcefully.

Moreover, due to the bent arms and the distance of muscle contraction is relatively short, it can generate sufficient angular velocity to drive the body forward. The anterior deltoid muscles and supraspinatus on the shoulders mainly play the role of assisting in stabilizing the shoulder joints and pulling the arm upward and forward moderately, making the transmission of strength more direct and efficient.

Step out.

Xie Zhengye could feel that the rectus abdomen, external oblique muscles and erection spinal muscles in his abdomen, etc., contraction can maintain the normal physiological bend of the spine, effectively transmit the strength generated by the legs upwards, and at the same time ensure the stability of the upper body during the rapid swing of the arms, so that the body can accelerate in a relatively stable direction. Compared with straight arm starting, rectus abdomen contraction can prevent the body from leaning forward excessively and allow the body's center of gravity to shift more smoothly in the horizontal direction.

Similar to straight arm starting, because the movement of the arm swing makes the body's center of gravity more likely to fluctuate up and down, the core muscles need to spend more energy to control this instability.

Now it's greatly reduced.

For example, when the arm swings backward, the center of gravity of the body may move backward and upward. At this time, the abdominal muscles need to contract more intensely to prevent the body from leaning back, and the back muscles must work together to ensure the overall balance of the body.

Now it feels much more comfortable.

The outside audience watched and saw Xie Zhengye start instantly, showing his advantages in starting with the bent arm.

His arms bent at an accurate angle, and his elbows were tightly attached to the side of his body, like a powerful piston.

When swinging the arm, the force explodes rapidly from the shoulder along the muscle chain. The short radius swinging the arm makes the force conduction more directly and quickly drives the center of gravity of the body forward.

This is completely different from ordinary straight arm starting. The straight arm starts with a long arm, the strength is dispersed and the conduction is slow, and the explosive power of the starting is weak.

Now this problem has been greatly solved.

Xie Zhengye's leg muscles exploded strongly, and his thrust was as fast as the start, and every step seemed to be propelling in an explosion. The force generated by the friction between the soles and the track pushed him like an arrow off the string.

bang, bang, bang, bang, bang, bang, bang.

Ten meters later.

Enter the acceleration zone.

Xie Zhengye continued to accelerate, and the rhythm of the bent arm swing accelerated, just like a high-frequency drum beat.

At this time, his head remains stable and his neck muscles are as stable as steel cables to ensure the balance of the head and avoid energy loss.

The shoulder muscles are rhythmically undulating, like rolling mountains, continuously delivering strength to the arms. His spine maintains the best physiological curve, like a full bow, providing stable support and elastic potential energy to the body.

The legs are more powerful, and the hip-sending movement is perfectly coordinated. The thighs drive the calf to swing forward quickly. The calf muscles show amazing explosive power during contraction and relaxation. The pace frequency is accelerated, and each step is accurately stepped on the explosion point of strength.

The force generated by the swing of the arm forms a combined force with the force of the legs to push him forward. His ankles show good rigidity when pushing the ground, effectively transmitting the force to the ground while maintaining stability to avoid energy loss.

In order to cooperate with the bending arm burst, Xie Zhengye's foot moves quickly and powerfully, and every time he contacts the ground, he can obtain the maximum reaction force. As the acceleration gets faster and faster, Xie Zhengye's body leans forward slightly to reduce the impact of air resistance on speed, just like a cannonball that whizzes by the air.

Gradually raised his head.

Running along the way.

Xie Zhengye's speed has been further improved and has entered a new stage.

At this time, his core muscles played a key role, like a stable central hub, integrating the power of the upper and lower body.

His stride reached a new balance at this stage, which not only ensured speed but did not consume excessive physical strength.

At this stage, his physical coordination reached the extreme, and the coordination of each joint and muscle group was like a carefully arranged dance. The knee bent and knee extension movements were smooth and natural, and the back and forward swing of the calf were just right.

Simply put, it is-

Running action ornamental.

Higher.

It looks better.

Bang!

Extremely exploded.

Xie Zhengye entered the core area of ​​the way, and his speed continued to rise like a rocket taking off. It can be seen that his technical movements are more delicate and precise than last year. The impact of the starting of the bent arm allows his body angle and swing amplitude to be fine-tuned according to speed to adapt to higher rhythms.

The leg muscles still maintain excellent elasticity while running at high intensity, and can produce powerful explosive power every time they push the ground.

Bang, bang, bang, bang, bang.

Bang, bang, bang, bang, bang.

Xie Zhengye began to prepare for the final sprint.

The body posture is slightly adjusted, which increases the amplitude of the hip delivery and further increases the stride.

His leg muscles showed super endurance and explosive power after years of training. Every time he stepped on the ground, it seemed like he wanted to leave a deep mark on the ground.

The last twenty meters.

Xie Zhengye was getting closer and closer to the finish line, and his speed still did not decay at all. His body was like a high-speed machine, and every part was working wildly for the final sprint.

This is the benefit of a 200-meter athlete running 100 meters.

His leg muscles have entered a super-strength working state, and the impact of lactic acid accumulation on him is much smaller than that of ordinary 100-meter athletes.

Xie Zhengye did not slow down too much.

It's like the natural speed of the human body attenuation.

It has a smaller impact on him.

He was taking big steps here.

Cross the finish line straight.

Others feel it.

It looks like.

It seems like I didn't let go much in the end.

He passed the front finish line straight.

"No way."

"Why didn't seem to be tightening the force in the end? It's just a leg. Is it running so fast?"

"Would you be too excited?"

"After all, young people."

Yeah?

Just when some older coaching staff sighed alone, they saw the results...

All were dumbfounded.

10.1…5???

I've won't be able to kill my legs until it's under 10.20???

And it's not more than a little bit.

I……

Liang Jiahong, who was just still feeling a little happy about his best leg-sliding performance in his career.

Look at this result.

Whole person.

They all feel a little numb.

Xie Zhengye himself turned his head and looked at the results. He was like a small motor that could not stop, and immediately shouted at Su Shen:

"Mr. Su, how did I run?"

It’s like a child who has a good grade exam, wants to show off, wants candy, and wants a little red flower.

“Haha, it’s great.”

Su Shen is not stingy either.

Raise your thumbs up.

I gave a big thumbs up.

This made Xie Zhengye even more excited.
Chapter completed!