I saw Su Shen enter the acceleration position.

fast.

Dynamically adjust the tilt angle of the torso.

Incline from 55°→48° to activate the fluid mechanical effect.

Calculated according to the air resistance formula - F_d=0.5pC_dAv².

The change in the angle of the trunk can reduce the area facing the wind by 18%.

A larger normal force also helps maintain the body's mechanical balance in the vertical direction, ensuring the stability of the athlete's body posture during high-speed movement, so that athletes can more effectively convert muscle strength into forward propulsion force and achieve efficient acceleration.

Not to mention, reduce the windward area.

It can also make the body smoother.

The lumbar segment experienced a stepwise stretch with a phase difference of 15°.

The human spine is composed of multiple vertebrae, and the vertebrae are connected by intervertebral discs, ligaments and muscles.

During exercise, step-by-step stretching of the lumbar segment is an orderly motion pattern.

When the human body enters acceleration from its initial position, the nervous system will issue instructions to cause the muscles around the lumbar spine to contract in a coordinated manner.

Because the muscle attachment points and mechanical levers of each lumbar segment are different, under the action of muscle contraction force, the lumbar spine will stretch in a certain order and angle, resulting in step-by-step stretching with a phase difference of 15°.

This step-by-step stretching can enable the spine to better adapt to the body's posture changes and external forces during movement, while reducing the pressure on individual vertebrae and intervertebral discs, protecting the structure and function of the spine.

Why do you need this?

Of course, we need to use the principle of improving the efficiency of centrifugal-centripetal contraction of the iliopsoas muscle.

The iliopsoas muscle is an important muscle connecting the lumbar spine, pelvis and femur, and plays a key role in hip joint movement during running.

When the acceleration run enters, when the tilt angle changes, the body's center of gravity and mechanical environment also change.

The iliopsoas muscle first undergoes centrifugal contraction, that is, the muscle is lengthened under stress, and the muscles will store elastic potential energy during this process.

As the body moves forward, the iliopsoas muscle quickly converts into centripetal contraction, that is, the muscle shortens and generates strength, releasing the stored elastic potential energy and converting it into the body's forward momentum.

This is why you need to do it first when connecting it to the top - dynamic adjustment of the torso tilt angle.

Because this principle of improving the efficiency of centrifugal-centripetal contraction by using the iliopsoas muscle is not done well.

What Su Shen wants to use is to improve the rapid pedal and stretching power.

The acceleration zone needs to quickly increase the speed. The efficient contraction and transformation of the iliopsoas muscle can enable Su Shen to lengthen the muscles in advance through centrifugal contraction to store elastic potential energy.

Then quickly shrink the stored energy into a powerful pedaling force, pushing the body forward, so that each step of pedaling can generate greater propulsion force.

Then optimize your body posture.

The iliopsoas muscle works in concert with other muscles, and the improvement of its contraction and conversion efficiency helps maintain the body's balance and correct posture during the acceleration process.

Through efficient contraction, the iliopsoas muscle can better control the movement of the hip joint, make the body's center of gravity transition smoothly, and reduce energy loss.

That is, let yourself...use more energy to accelerate forward.

Cooperate with the enhancement of joint stability.

This is because during the acceleration process, the hip joint needs to withstand greater pressure and impact forces. The efficient contraction and transformation of the iliopsoas muscle can better maintain the stability of the hip joint, and through precise muscle control, the joints maintain the correct position and angle here.

Reduce joint shaking and damage risks.

Provides a stable foundation for exerting force on the legs.

So what is the basis?

Of course the answer is-

Further promote stepping!

Step frequency?

What is the relationship with the principle of improving the efficiency of centrifugal-centripetal contraction by using iliopsoas muscle?

relation……

It's big.

The iliopsoas muscle has high contraction and conversion efficiency, which can quickly complete the cycle of contraction and relaxation of the leg muscles, and speed up the swing of the leg.

The efficiency of iliopsoas muscle centrifugal-centripetal contraction conversion means that the muscle can complete the process from lengthening to shortening more quickly.

In the sprint acceleration zone, each step cycle includes the back swing of the leg, that is, the forward swing of the centrifugal contraction stage, that is, the centripetal contraction stage. This mode efficient conversion reduces the time spent in each stage, thereby shortening the entire muscle contraction cycle, and directly increasing the pace frequency within a unit time.

Can this work?

Of course it can do it.

Because the muscle contraction cycle is shortened.

And while doing this technical action.

It also has also been optimized for muscle mechanical properties.

This is because.

The mechanical properties of the iliopsoas muscle have a significant impact on the pace frequency!

Just like this step Su Shen is now.

During the centrifugal contraction stage, when the muscle is elongated, actin and myosin in the sarcomer interact to store elastic potential energy.

Efficient conversion efficiency means that muscles can store more elastic potential energy in a shorter time, and these energy can be released more effectively during the centripetal contraction stage.

According to the muscle mechanics model, this rapid release of energy increases the power output of muscle contraction, increasing the acceleration of leg swing.

At the same time, muscle viscosity is better regulated during the efficient conversion process, reducing energy loss within the muscles and making muscle contraction and dilation smoother.

Due to the fast shrinkage conversion speed, the legs can complete the back swing and forward swing cycles in a shorter time, thereby accelerating the overall swing speed.

Then increase the pace frequency.

There will be new possibilities.

certainly.

To this extent.

It's that simple, it's too easy to break through.

Su Shen’s activation is the only one among everyone.

In the case of a unique level, I want to go further.

It's like dancing at the pyramid.

The difficulty and complexity of breakthroughs.

They are all increasing exponentially.

Can.

terribly sorry.

This can stop everyone in the world.

I just can't stop Su Shen himself.

because……

His knowledge system.

He was not allowed to stop.

He is not allowed to stop.

After the above are done, the Achilles tendon superelastic effect is ready and can be activated as soon as possible.

Achilles tendon hyperelastic effect.

activation!

This chapter is not over, please click on the next page to continue reading! The Achilles tendon has super elastic properties. During the support period of the 100-meter acceleration zone, when the athlete's foot hits the ground, the weight of the body and the impact force generated by the movement make the Achilles tendon stretch.

During the short support period of 0.08s, the strain energy of Achilles tendon reached 6.2%, close to its ultimate elastic deformation threshold of 8%.

In this process, the Achilles tendon is like a spring, following Hooke's law F = kx, where F is the force acting on the Achilles tendon, k is the elastic coefficient of the Achilles tendon, and x is the deformation variable of the Achilles tendon.

According to the elastic potential energy formula E = 0.5kx², it can be seen from the calculation that the energy stored by the Achilles tendon during this process is about 42J.

This superelastic effect of the Achilles tendon is determined by its special biomechanical structure.

The Achilles tendon is mainly composed of collagen fibers. These fibers will be stretched and rearranged in an orderly manner when under stress, so that the Achilles tendon can store a large amount of elastic potential energy while bearing a large amount of tension.

When the stretching of the Achilles tendon reaches a certain level, the intermolecular force inside it will resist further stretching, ensuring that the Achilles tendon does not exceed its limit elastic deformation threshold, thus ensuring that the Achilles tendon can continuously and stably play the role of energy storage and energy release during repeated movements.

So.

In the 100-meter acceleration stage.

This storage and release of elastic potential energy is crucial to improving athletes' propulsion and exercise efficiency.

It can quickly release stored energy at the end of the support period, helping the ankle to produce powerful plantar flexion forces and push the body forward.

Then.

Reactivate plantar fascia force line conduction!

When accelerated by 100 meters, the ankle plantar flexion will convert the plantar flexion force into anterior impulse through the Windlass mechanism.

When the toes are off the ground, the metatarsophalal joint is stretched out, causing the plantar fascia to be tightened, just like a tightened bowstring.

Just like Su Shen now.

This tensioning force is transmitted through the force line of the plantar fascia, transmitted from the heel to the forefoot, thereby generating a forward component force that drives the body forward.

At this time.

Su Shen thrust strongly.

Arch stiffness index (AI) has been increased to 3.8N/mm.

This means that his arch can now maintain good stiffness and stability when under stress.

Effectively transmit power to the ground, providing better support and propulsion for the body.

It is not metaphysics to be able to do this.

This is science.

Because the plantar fascia is the fibrous tissue connecting the calcane and metatarsal bones, it plays a key role in maintaining the structure of the arch and transmitting strength.

The principle of the Windlass mechanism is based on the anatomical relationship between the plantar fascia and the metatarsophalal joint.

When the metatarsophalal joint is dorsally extended, the tension of the plantar fascia increases, which is transmitted to the entire arch through the fibrous structure of the fascia, causing the arch to rise and become harder.

The increase in arch stiffness helps to reduce the energy loss of the foot during the landing and pushing, and improves the efficiency of force transmission.

In the 100-meter acceleration zone, athletes need to quickly convert the ground reaction force into forward propulsion force.

The force line conduction of the plantar fascia and the change in the arch stiffness of the arch are just...can effectively achieve this transformation.

Provide athletes with continuous acceleration motivation to improve their athletic performance.

Of course, there are not necessarily any statements about fascia now.

Not to mention reactivate the transmission of plantar fascia force line.

No cognition.

Not to mention that it has to be applied to sports practice.

terribly sorry.

Now this wave of science and technology.

Only Su Shen is mastered.

He only opened the door to him.

so……

It's a pity.

Bolt and Carter did put in their efforts.

Various scientific breakthrough attempts have been made.

only.

From Su Shen.

More scientific.

More in-depth.

More advanced.

How do you say that sentence?

By the way.

Everything is divided into different levels.

People are no exception.

science.

No exception.

You may have seen Carter thinks Carter is already very strong.

After reading Bolt, I thought Bolt was more scientific and awesome.

But until Su Shen.

You will understand.

What is the charm of scientific movement?

They all did a good job.

only.

It's better than yourself.

Competitive sports.

There is a natural comparison.

There is a comparison.

There are good and bad things.

Bang bang bang bang bang bang bang.

When Su Shen's feet land on the ground, the weight of his body and the forward momentum will cause the calf triceps to centrifuge. This contraction force is transmitted to the Achilles tendon through the tendon, causing it to be lengthened.

Bang bang bang bang bang bang bang.

The collagen fiber structure inside the Sushen Achilles tendon has good elasticity. During the elongation process, the molecular bonds between the fibers will be stretched and twisted, just like stretching a high-performance spring, thereby storing a large amount of elastic potential energy.

Bang bang bang bang bang bang bang.

The super elastic properties of the Sushen Achilles tendon enable it to quickly adapt to this high-intensity and high-frequency load change, effectively converting the impact force generated every time it hits the ground into elastic potential energy.

When the calf triceps change from centrifugal contraction to centripetal contraction, the Achilles tendon begins to rebound rapidly.

This rebound is almost instantaneous, and it releases the previously stored elastic potential energy with extremely high efficiency, providing strong plantar flexion force for the ankle joint.

This power allows Su Shen to generate greater power when he pushes the ground and pushes his body forward quickly.

Su Shen continued to widen the gap with Carter.

Bolt.

even.

The first acceleration zone is ten meters.

None of them took advantage!

Carter did a good job.

However, without the assistance of the Achilles tendon superelastic effect, he cannot obtain greater ground-pushing reaction force under the same muscle strength output.

It is also impossible to achieve greater acceleration in the body here.

I could only watch Su Shen.

Pull it away strongly.

Of course, Bolt.

Bolt used to be apart from starting.

Any segment can suppress everyone.

Including Su Shen.

but.

There have been changes since last year.

This year.

Su Shen went further.

More obvious!

Usain?

bring it on.

Let me see how much your winter training has improved?

Can it be?

It can stop my winter training from progressing!

Bang bang bang bang bang bang bang.

This extra acceleration helps...Su Shen shortens the contact time between the feet and the ground!

This chapter is not over, please click on the next page to continue reading! This shortens the contact time on the ground, but is a super essential thing.

Maybe many people don't know.

The best data in the world.

Not Bolt, not Su Shen, not any five tigers, even...

It does not belong to any male athlete.

That's right.

The best person to do this data.

It's a female athlete.

Her name is "Flower Butterfly" Joyna.

0.071s.

Yes, I didn’t expect that such a key data was actually created by female athletes.

but.

This is the fact.

This is done well.

This allows athletes to complete a ground-pushing action faster and enter the next step cycle.

Naturally improve the pace frequency limit!

Naturally, you can have a higher upper limit!

The rapid rebound of Sushen's Achilles tendon drives the calf to swing quickly.

In the acceleration zone, the increase in step frequency not only depends on the force and speed of the slitting ground, but is also closely related to the swing speed of the calf.

The force generated when the Achilles tendon rebounds is transmitted through the muscles and bone structure of the calf, allowing the calf to swing at a faster angular speed.

Therefore, prepare for the next step of landing and pedaling in advance.

This fast calf swing can reduce the time of swinging phase, allowing Su Shen to place his foot to the next landing position faster, thereby improving the overall pace frequency.

Bolt discovered.

I actually accelerated the zone.

I can't hold on to Su Shen?!

It was after improving technology again this year.

this……

How is it possible???

he.

Has it been improved so much?

Nothing is impossible.

If Su Shen could hear Bolt's voice, he would definitely tell him...

On technology.

You are not as good as me.

On the advanced and forward-looking nature of technology.

you.

Not as good as me.

You did a good job.

that is.

My skills are better.

Bang bang bang bang bang bang bang.

Bolt's first acceleration was not cheaper than the ten meters.

This allowed him to accelerate the second ten meters.

Striving for speed!

Bolt is getting faster and faster.

There is nothing to do about this.

He is the world's number one fastest.

No one can come out of his way.

Can do it.

Just try to make his suppression segments as much as possible.

Come later.

The later it comes.

The more likely you are to take him down!

Bang bang bang bang bang bang bang.

Twenty-five meters!

Sushen's plantar fascia needs to quickly and accurately transmit ground reaction forces to the whole body to achieve effective utilization of power.

The longitudinal fascial fibers are mainly responsible for transmitting vertical forces upwards to the calf.

Transverse and oblique fibers play a role in maintaining the width and stability of the arch.

The force in the horizontal direction...

Distribute evenly to all parts of the sole of the foot.

keep going.

Bolt's pursuit is bound to become more and more fierce.

After each ten meters are divided into sections.

Bolt will become more and more perverted.

Can.

Su Shen is ready.

The arch plays a key role in this process.

It is like a natural spring and shock absorber, which elastically deforms when subjected to stress, stores energy, and releases energy during the pedal stage, enhancing the propulsion force of Su Shen’s soles.

Then through the force line of the plantar fascia, the ground reaction force on Su Shen can be transmitted upward along the bones and muscle structures of the legs.

This allows Su Shen’s own body to better use this power to push forward.

Bang bang bang bang bang bang bang.

Can't stop!

Bolt is getting faster and faster.

Can.

I still have to suppress him.

This shot.

He can't give him a chance to explode in the acceleration zone.

because……

This shot.

This area.

It's time to explode.

It's me!

It's my turn!!!

Usain!!!!!!

Bang bang bang bang bang bang bang.

During the pedal stage, Sushen's plantar fascia releases stored energy, which works synergistically with the energy released by the Achilles tendon.

Further enhance the power and effect of striking the ground.

This synergistic effect allows Su Shen to generate stronger thrust when he pushes the ground, pushing his body forward further and faster.

In addition, plantar fascia force line conduction can also optimize the movement order and coordination of lower limb joints.

And in the acceleration zone.

Efficient joint motion coordination is crucial to improving stride frequency.

I saw Su Shen in the final acceleration zone—

The plantar fascia interacts with surrounding muscles and ligaments.

Adjust the movement angle and speed of each joint of the lower limb.

Make your swing legs swing forward and land faster in the acceleration zone.

The plantar fascia is connected to the muscles of the calf.

When it is subjected to force, it will affect the contraction and relaxation of the calf muscles through the stretching reflex of the muscles.

Su Shen used this to regulate the movement of the knee and hip joints.

To reduce swing time.

Enable Su Shen to complete a pace cycle further and faster.

This improves the pace frequency.

Coupled with the super strong wind.

Things that were easy to do in the plateau before.

It began to transform into the plains for the first time.

So.

Usain.

This shot.

What are you going to block me!!!

Su Shen felt a barrier in an acceleration zone.

But this time.

He was speechless.

Raise your foot.

Just break!

Bang.

Under this shot.

Human Super Start Segmentation.

Broken.

Human super-accelerated segmentation.

also.

Broken.

Just as Su Shen raised his legs again and again.

Has been crushed.
Chapter completed!