The Su God of the Reopening of the Sports Arena

Chapter 2257 Parallel Control Mechanism! Mistakes are not a problem

Bang bang bang bang bang.

Both Bolt and Su Shen noticed each other's changes.

I admired him silently for a thousandth of a second, and then I despised him in my heart, thinking that I was the greatest in the world.

No matter how great you are.

You can't beat me!
It can only be my footnote!
So now they have all started a battle for an area.

That is--

Energy metabolism pattern.

Why is this.

This is because we are about to reach the extreme speed zone. Whoever has better control over energy at this time can obtain more energy in the extreme speed zone.

Bolt started the operation first using the three-joint torque technology.

Make your energy consumption show the characteristics of joint stratification.

The ankle joint mainly relies on the phosphagen system for rapid energy supply.

For initial shock absorption.

Due to the high intensity of eccentric contraction of the knee joint, the proportion of energy supply from glycolysis increases to 30%-40%.

The hip joint maintains extension torque through a combination of CP and glycolysis.

Su Shen emphasizes system integration efficiency more on energy consumption.

The energy consumed in vertical force absorption accounts for the highest proportion.

Relies on the coordinated eccentric contraction of muscles throughout the body.

The control of the front and rear force components involves rapid extension and contraction compound movements, with phosphocreatine accounting for 70% of the energy supply.

The energy consumed by stabilizing the internal and external forces is relatively low, but it requires continuous activation of the core muscles.

Both of them began to prepare for the extreme speed zone.

The elastic energy stored in Bolt's steps is mainly concentrated in the local joint structure.

The Achilles tendon of the ankle, the patellar tendon of the knee, and the iliotibial band of the hip joint respectively store the impact energy of the corresponding joints.

Its elastic recovery efficiency is directly related to the range of motion of the joint.

Su Shen responded by emphasizing the overall energy storage effect of the fascia chain.

The fascial network of the posterior superficial line Achilles tendon-hamstring-erector spinae, lateral line, etc. forms an "elastic linkage" under the action of three-dimensional force.

In this way, the complete performance of the fascia chain can increase the overall energy recovery rate by 15%-20%.

The two of them were simply——

Mars hits Earth.

They all started to show their real abilities.

The three-joint torque technology gradually increases the step frequency and stride length through the sequential movements of rapid plantar flexion of the ankle joint, high lifting of the knee joint, and active forward swing of the hip joint.

However, this technique relies too much on the joints exerting force sequentially, and the torque of each joint needs to be constantly adjusted during the acceleration process, which results in a time cost for the movement conversion. When athletes need to increase their speed quickly, this sequential force mode may not be able to meet the instantaneous force increase requirements, resulting in an acceleration curve that is not steep enough.

Bolt also did not do well on this issue before.

Of course, you can also understand him as not having the intention to do it.

After all, it's easy to win.

Who is willing to spend time studying these things?

But look at him now?

The adjustment of torque during acceleration becomes more and more handy.

The cost of action conversion has also become lower.

Mills arranged a breakthrough for him.

The essential flaw of the traditional "ankle-knee-hip" three-joint sequential recruitment lies in the hierarchical delay of neural signal transmission and the antagonistic inhibition of muscle activation.

So Mills moved Bolt's pre-activation window forward.

That is to say, the feedforward control mechanism is used to decouple the joint activation timing from the landing cycle!
50ms before the swinging leg touches the ground.

The touchdown point is predicted through the visual-vestibular system.

Start the pre-activation procedure for the next joint in advance.

And it requires Bolt to pre-activate the eccentric contraction ability of the quadriceps of the knee joint before his ankle touches the ground.

Stores elastic potential energy.

During the knee joint buffering period, the gluteus maximus of the hip joint is simultaneously activated to prepare for concentric contraction.

Shorten the torque switching window period.

That is to say, through the predictive regulation of the central nervous system, the "passive response after touching the ground" is transformed into "active preparation before landing", compressing the time chain of sequential activation and increasing the overlap rate of the torques of the three joints by several percent.

The second is to break the traditional pattern of "alternating contraction of agonist and antagonist muscles" and establish a functional co-activation mechanism.

When the ankle joint is in plantar flexion, the tibialis anterior and triceps surae maintain a co-activation of 20%-30%, while traditionally it is only 10%, forming a "dynamic stability triangle".

When the knee joint is raised high, the quadriceps and hamstrings contract synchronously with a force ratio of 4:1, reducing the energy loss of flexion and extension conversion.

This then allows for higher torque output by increasing joint stability while reducing the conduction delay of nerve signals in antagonist muscle inhibition.

such.

Bolt's three-joint torque technique.

It has been improved essentially.

Under such backward scientific research conditions in Jamaica.

Can Mills do this?

You have to say, he's really capable.

That's why.

Bolt is full of confidence here.

It was his turn on the technical level.

Shock the rest of the people.

Sue.

Let me show you what I can do.

Three joint torques.

break out!

Bolt began to show amazing energy here.

The speed zone is right in front of you.

The whole person seemed to be suddenly covered with lightning.

Energy is bursting out of the eyes.

If energy could be materialized.

I guess you'll see it now.

A terrifying energy tide burst out from Bolt's body.

it is good.

This is you.

This is you.

Usain!
Show the world what you're really capable of.

That's how it should be.

Bolt stepped in.

Six-second burst.

The third phase.

Unlock.

Height unlocked.

Deep unlocking.

Antagonist muscle inhibition deep regulation!
Overactivation of antagonist muscles can seriously affect joint movement speed and force output. Through neural control training, the inhibition of antagonist muscles can be optimized.

Mills arranged for him to -

Antagonist myoelectric stimulation technology is used to apply weak electrical stimulation to the antagonist muscle when the agonist muscle contracts to reduce its excitability.

Proprioception training is carried out to enhance athletes' active control over antagonist muscles, so that they can inhibit antagonist muscle activity to the greatest extent without affecting joint stability.

Reasonable regulation of the antagonist muscle inhibition depth can increase joint movement speed by 20%.

Wave-like force of the lower limb chain!
With the three joint torques, it is...

When the ankle joint exerts force, the force generated is transmitted upward in the form of a wave, triggering the pre-activation of the knee and hip joints at the same time.

When the knee joint exerts force, it not only completes its own extension movement, but also drives the hip joint to swing forward faster through the muscle fascia connection.

When the hip joint exerts force, the propulsion force of the lower limbs is further strengthened. This wave-like force makes the joints of the lower limbs form an organic whole, and the efficiency of force transmission is greatly improved.

Suddenly.

Bolt felt that his extreme speed was finally beginning to recover.

It's not that he's sliding downhill at a very fast pace.

However, the way he ran now required him to make certain sacrifices in speed.

Strive to extend the entire extreme speed zone.

But if it can maintain a longer acceleration zone.

And on this basis, he can restore his extreme speed again.

Just do it.

Mills gave him this arrangement.

There is an opportunity to further extend the extreme speed zone...

It gave us another chance to regain our top speed.

Dynamic coordination of upper and lower limbs!
A phase difference model of upper and lower limb swinging was established to determine the optimal swinging rhythm, such as when the supporting leg was extended, the contralateral upper limb swung forward to the maximum amplitude.

Through special coordination training, the nerve's ability to control the coordination of upper and lower limbs is enhanced, so that the reaction force generated by the swing of the upper limbs can better assist the acceleration of the lower limbs.

In theory, Mills believes that optimized upper and lower limb coordination can increase overall propulsion by 12%-15%.

Then.

Bolt has a chance.

Restore your human speed limit segment.

The activation ratio of synergistic muscle groups is optimized!
Sue.

Let you see.

My progress!!!
Bolt took another step forward.

In three-joint torque technology, the activation ratio of synergistic muscle groups is often fixed, which makes it difficult to adapt to complex acceleration requirements.

That's why Mills wanted him to come by himself.

Let Bolt make his own adjustments.

Because this is part of the three-joint technique.

A crucial step to improvement.

If you fail to do this, all the rest will be in vain.

All the previous work was in vain.

Bolt——

During the ankle joint force phase, the activation ratio of the triceps surae and tibialis anterior is adjusted to 7:3 to ensure plantar flexion strength and stability.

During the knee joint force phase, the quadriceps and hamstrings contract synergistically in a ratio of 6:4 to achieve efficient flexion and extension conversion.

During the hip joint force phase, the activation ratio of gluteus maximus to iliopsoas is set at 8:2 to enhance the back-pedal and forward swing strength. Accurate activation ratio can improve the efficiency of muscle group coordination. Bolt is in the extreme speed zone, another step.

Precise control of the center of gravity trajectory!
At top speed, the trajectory of Su Shen's body center of gravity is crucial to propulsion efficiency.

At the moment of touching the ground, the ankle joint exerts force to move the center of gravity forward quickly, reducing the horizontal braking time.

When the knee joint is buffering, the vertical fluctuation of the center of gravity is controlled to the minimum range by precisely controlling the flexion angle, avoiding energy waste in vertical fluctuations.

During the hip joint force phase, use the forward swing and backward kicking movements to quickly move the center of gravity forward in a straight line.

Mills established a mathematical model of the center of gravity trajectory.

Combined with my own experience, I get real-time feedback - the center of gravity offset error can be controlled within 1-2 cm.

Significantly improve acceleration efficiency.

Bolt did it in one go.

You can see the torque adjustment just now.

Giving Bolt quite a bit of extra confidence.

Thinking in my heart...

I'm so good this time.

They were all stepped on.

this time.

I'd better let Su take a look at my technical ability.

indeed.

Very strong.

Very oppressive.

but.

Su Shen is still leading now.

Bolt.

Do you have a plan?
Don’t I have a ladder to cross the bridge?

Su Shen also started to liberate around fifty meters.

Not in a hurry.

Joint angle optimization!

Determine optimal joint angles through biomechanical analysis!
Ankle joint: Maintain 90°-95° ​​plantar flexion angle at the moment of contact with the ground, and reach 120°-130° when extending.

Knee joint: Maintain a flexion angle of 120°-130° during the buffer period and close to 180° during extension.

Hip joint: Flexion angle reaches 120°-130° when swinging the swinging leg forward, and extends to 180° when pushing back.

Dynamic adjustment of force vector synthesis angle!
The synthetic angle of the ground reaction force is adjusted in real time according to the acceleration process.

Increase the proportion of vertical force and keep the combined angle at 45°-50°.

Gradually reduce the vertical force ratio and adjust the combined angle to 35°-40° to improve forward propulsion efficiency.

Maintain a stable force vector angle to ensure continuity during extreme speeds.

Step out at full speed.

Three-dimensional force timing matching optimization!

The propulsion efficiency can be improved by optimizing the timing matching of the three-dimensional force components!
Su Shen proved it immediately.

Bolt is changing.

he.

Same here.

and.

There will only be more means.

Stronger.

More advanced.

Vertical force Fz - actively increase the plantar flexion stiffness of the ankle joint at the moment of contact with the ground, so that the Fz peak occurs 10-15ms earlier and the support base is quickly established.

When the knee joint enters the buffer period, the rigidity of the lower limbs is appropriately reduced, the Fz action time is prolonged, and full energy absorption and conversion are achieved.

Front and rear force Fx - before the swinging leg lands, Su Shen adjusts the angles of the hip and knee joints so that the direction of Fx is closer to the horizontal at the moment of landing.

During the ankle extension phase, the propulsive effect of Fx is maximized through rapid forward movement of the hip joint and coordinated extension of the knee joint.

Divide Fy into internal and external parts - activate the side chain muscles such as the gluteus medius and tensor fasciae latae, keep Fy stable during the entire acceleration process, and prevent energy loss caused by lateral movement of the body.

Su Shen continued to move forward.

Same body.

Lightning flashed.

It felt like plasma exploded inside my body.

After optimization of the timing matching of three-dimensional force components.

Refinement of hierarchical control.

hit the road.

The original hierarchical control had the problem of insufficient efficiency in information transmission between levels.

By refining the hierarchical control levels, the control accuracy can be improved.

Su Shen immediately activated them one by one skillfully.

The first step is to establish a primary control layer, which is responsible for processing basic sensory information from muscle and joint receptors and quickly triggering simple neuromuscular responses such as stretch reflexes;.

Then the intermediate control layer receives and integrates the information from the primary layer, and adjusts the force intensity and sequence of each joint according to the movement goals.

The final high-level control layer is based on decisions made by the cerebral cortex.

Combining the information from the visual and vestibular systems, the entire acceleration process can be macro-controlled. Su Shen has a clear division of labor at all levels, and information transmission is more orderly and efficient, avoiding control delays and confusion caused by mixed information.

Another step forward.

Introducing parallel control!
This is what Su Shen did to make up for the lack of sequential force.

This is where the parallel control mechanism comes in.

The so-called parallel control mechanism is——

In the extreme speed zone, in addition to activating the joints in the order of "ankle-knee-hip", the core muscles and upper limb arm swing muscles are activated at the same time.

The stable contraction of the core muscles provides a solid foundation for the lower limbs to exert force and reduces the shaking of the body when exerting force.

The coordinated action of the upper limb swinging arms assists the body in accelerating forward through the principle of conservation of momentum.

When a certain joint fails to exert force, the parallel control pathway can quickly call on other related muscle groups for compensation. For example, when the ankle joint is insufficiently strong, the overall acceleration effect can be maintained by enhancing the extension strength and speed of the hip joint.

This is what Su Shen did here.

The so-called parallelism.

It is a way of quickly compensating by muscle groups, strength and speed when there is a problem in exerting force on a certain joint.

Even if you are the best athlete.

You will also have some problems.

Because humans are not robots.

Even if you run well with this shot, it doesn't mean you will run well with the next shot.

So it's best to get yourself a patch.

This patch is the parallel control mechanism.

Although the parallel mechanism requires high compensation from the muscle groups.

but……

how to say?

This problem is not a problem at all for Su Shen.

because.

After he reopened this time.

No muscle was left behind.

For these techniques the muscles support training.

Su Shen has always cared more than anyone else.

That just presents a problem.

Even Su Shen had problems with the strength of some joints in the extreme speed zone.

So can he.

Easily rely on your own parallel control mechanism.

Apply a patch.

Let your system continue to run smoothly.

This……

Mills' attention was originally on Bolt, but at this moment he had to be diverted by Suarez.

the reason is simple.

Su Shen did it here.

Once again, it was hard for him to accept.

Because he had just seen with his own sharp eyes and experience...

This Oriental man took several single and double steps in the previous few times.

There is a problem with the knee joint working.

This was definitely a mistake.

Who told the people in front to go so fast?
but……

This thought did not last a moment.

It is replaced by the next thought.

he.

Is he kidding?
I made a mistake, why...

Running is like nothing happened.

It can't be that I saw it wrong, right? ? ?
of course not.

It's just that Mills didn't know this system and theory.

So at first glance.

The whole person’s cognition.

Challenged again.

Sushen parallel control is combined with hierarchical control to form a hierarchical-parallel hybrid strategy.

Ensures the accuracy of control.

It also improves the flexibility and response speed of the system.

This is a problem that even Mills finds difficult to solve now.

By him.

An understatement.

Resolve.

and.

With almost no loss of speed.

Rushed to the back.