The Su God of the Reopening of the Sports Arena

Chapter 2248 The better the villains perform, the more powerful I will be.

have to say.

Bolt has indeed done well this year.

Worthy of the title of hard work.

This shot is indeed very powerful when it starts.

It's just a pity.

His opponent is Su Shen.

It's this era.

The king of startup.

For Blake, the compact stance he adopts on the starting blocks is essentially a precise control of his body's center of gravity.

Through measurement, it was found that the projection point of the center of gravity in the ready posture is about 20-25cm away from the starting line.

This position enables a "pre-loading" effect.

When the body leans forward, the quadriceps, gluteus maximus and other hip and knee flexor muscles are in an eccentric contraction state, just like a compressed spring storing elastic potential energy. According to Hooke's law F=kx, the degree of muscle pre-stretching (x) is proportional to the elastic restoring force (F). A reasonable forward tilt angle of the center of gravity (about 45°-55°) allows the lower limb muscles to achieve the best initial tension.

Blake is indeed more intelligent.

at this point.

Better than Bolt.

I also like to study more.

This joint angle configuration enables the lower limbs to form an efficient "lever system". Taking the knee joint as an example, a smaller flexion angle shortens the length of the resistance arm.

Based on the principle of lever, F1×L1=F2×L2.

While keeping the muscle contraction force (F1) unchanged, the pushing force (F2) can be significantly increased.

It's about initiating a reaction.

It’s still hard to put it into words.

Only 0.185s.

And this is not slow for Blake.

布雷克的蹬地动作呈现独特的“斜向发力”特征。运动捕捉数据显示，其蹬地瞬间垂直力峰值可达体重的5-6倍，水平力峰值达体重的3-4倍，合力方向与地面夹角约35°-40°。

This force mode achieves efficient acceleration through the following mechanisms.

He also began to train more scientifically.

This shows that Mills did keep his word.

Gave him more training attention.

first step.

Overcoming gravity makes the body airborne and creates a time window for forward acceleration.

The second step.

Directly driving the body's center of mass forward complies with Newton's second law F=ma, allowing a larger horizontal component of force to produce higher acceleration.

third step

The angle of 35°-40° ensures horizontal propulsion while avoiding energy loss caused by excessive vertical displacement.

the fourth step.

The quadriceps, gluteus maximus, and calf triceps contract explosively.

The hamstrings and iliopsoas muscles assist in extending the hip and knee.

The rectus femoris and other muscles relax through the reciprocal inhibition mechanism, reducing the resistance to contraction.

Blake completed the transition from crouching to upright posture within four steps after the start, and the trajectory of his body center of gravity showed a smooth parabolic feature.

The step lengths of the first four steps increase by 10%-15% respectively to allow the center of gravity to move forward smoothly.

The trunk angle changes from 45° forward leaning to 85° upright, and the angular velocity is controlled at 80-90°/s.

The arms swing back and forth up to 120°, forming a reverse torque balance with the lower limb movements.

2. Start by plantar flexion of the ankle joint → 3. Push forward by extending the knee joint → . Complete push-off by extending the hip joint.

This sequence of joint movements from far to near conforms to the principle of the "whiplash effect". Just like when a whip is whipped, the tip has the fastest speed, which can effectively transfer the ground-pushing force to the body's center of gravity.

This all shows that Blake has done a good job focusing this year.

Even though I mainly train for the 200 meters, I never give up the 100 meters.

There is still obsession in my heart.

It’s just that the current 100-meter environment is too bad, and there are too many experts. It’s impossible to win honors or get corresponding income, so I can only settle for the next best thing.

But as long as there is a chance, he will fight back again.

Blake's talent is really good, otherwise Mills would not have let him focus on the 100 meters.

The explosive contraction of Blake's lower limb muscles is essentially a reflection of the efficiency of the cross-bridge circulation of actin and myosin in the sarcomere. Laboratory studies have shown that his fast-twitch type II muscle fibers account for 82%, and his myosin ATPase activity is 18%-22% higher than that of ordinary athletes.

This speeds up his ATP hydrolysis rate.

Provide faster energy supply for muscle contraction. At the moment of starting to push off the ground, the cross bridge engagement rate can reach 5-7 times per second, far exceeding the 3-4 times of ordinary athletes.

The peak tension generated by this high-frequency cross-bridge cycle is more than 30% higher than that of ordinary people.

Not to mention that Blake’s neuromuscular system exhibits unique “calcium transient” optimization—

When impulses arrived at his motor neurons, voltage-gated calcium channels opened 15 percent faster than in normal athletes.

This allows the sarcoplasmic reticulum calcium release channel to quickly release Ca within 0.5 ms, and the peak cytoplasmic Ca concentration can reach 10 mol/L, which is about 8×10 mol/L higher than that of ordinary athletes.

Blake's Achilles tendon stiffness is 150N/mm.

This allows it to store more elastic potential energy when pushing off the ground.

According to the law of conservation of mechanical energy, part of the energy (E) generated by muscle contraction during the push-off phase is converted into kinetic energy (E=mv).

The other part is stored as elastic potential energy of the Achilles tendon and fascia (E=kx). Blake's elastic potential energy recovery rate is as high as 65%, which is about 50% higher than that of ordinary athletes. This "passive elastic assistance" significantly improves the efficiency of pushing off the ground.

With these, he can do——

During the start, the torque output of the hip, knee and ankle joints shows a strict time sequence.

0-0.1s: The ankle plantar flexion torque first reaches its peak value (350N·m), initiating the “whiplash effect”.

0.1-0.2s: The knee extension torque reaches its peak value (480N·m), forming the main propulsion force.

0.2-0.3s: The hip extension torque reaches its peak value (520N·m), completing the transfer of center of gravity.

This torque gradient of hip joint > knee joint > ankle joint matches the distribution of inertia moment of the human lower limbs, where the hip joint has the largest moment of inertia. It complies with the energy transfer principle "from large joints to small joints" and increases the mechanical energy transfer efficiency to 89%.

But this is an advantage, there are also some disadvantages that still need to be adjusted.

For example, when Blake starts running, the knee flexion angle of 90°-100° is significantly smaller than the normal posture. Although it improves the contraction efficiency of the quadriceps, it will cause the patellofemoral joint pressure index to increase by 25%-30%.

In the knee joint biomechanical model, when the human body flexion angle is less than 100°, the shear force borne by the patella can reach 8-10 times the body weight.

Long-term training may cause chondromalacia patella or patellar tendinitis.

Although the ankle plantar flexion angle of 80°-85° enhances the power of the triceps surae, the peak tension of the Achilles tendon can reach 180% of its maximum load!

Exceeding the Achilles tendon's safe stress threshold by 150%.

Although it is said that athletes have stronger bodies and the ability to withstand physical stress.

But doing this for a long time will also cause problems.

You need to keep adjusting, keep strengthening, and keep making up for your weaknesses and shortcomings.

Otherwise the worst.

possible……

There is a potential risk of Achilles tendon rupture.

The "preloaded" posture, in which the projection of the center of gravity is 20-25cm away from the starting line, increases the muscle elastic potential energy reserve, but the excessive forward trunk angle of 45°-55° can easily cause the thoracic and lumbar segments of the spine to bear abnormal flexion loads, and the lumbar intervertebral disc pressure increases by 40% compared to the upright posture.

Sports energy metabolism analysis shows that resting oxygen consumption in this posture is 15% higher than that in the normal posture, which may lead to the consumption of tiny energy reserves before the start and affect the energy supply in the subsequent acceleration phase.

Although the combined force angle of 35°-40° takes into account both horizontal propulsion and vertical take-off, the data from the three-dimensional force platform shows that the symmetry error of the ground-pushing force of the left and right lower limbs can reach 8%-10%, which is higher than the average level of excellent athletes.

but……

This asymmetry may trigger a compensatory pelvic tilt.

This causes the trajectory to deviate after the start.

Especially when the temperature difference of the plastic track is greater than 2°C on the left and right sides, the change in friction coefficient will amplify this deviation.

If eye tracking, which did not exist in sprint training, was introduced during this era, it would be found that Blake's visual gaze stability and the amplitude of gaze point drift in major competitions, such as the Olympics, increased by 35% compared to during training.

This distraction increased the coefficient of variation of stride length in the first three steps after the start from 3% to 5.2%.

This causes the center of gravity trajectory to fluctuate more, affecting acceleration continuity.

The "oblique force" mode its technique relies on requires the three joints of the lower limbs to complete a rapid transition from eccentric to concentric contraction within 0.15 seconds. This "explosion-buffer" cycle places extremely high demands on the damage threshold of the muscle-tendon complex.

When ordinary athletes use the same training program, the incidence of stress fractures is 2.3 times higher than that of traditional starting training, suggesting that this technology has strict requirements on the structural adaptability of the musculoskeletal system.

So, even Blake.

There are actually quite a few problems.

It’s just that he can’t really see it now.

Jamaica's team research system also has limitations.

Although you could argue that Mills's is the best in Jamaica.

But this still seems quite ordinary given the future technological level.

I'm sorry for an athlete of his level.

That's why Blake suffered those injuries in his previous life.

It is simply because, with his scientific research and medical conditions, it is difficult to prevent these problems in advance.

Otherwise, most of them can be avoided.

But Blake now thought of a new way.

That is, he gave paid consultation to Su Shen.

As a friend, he settled the bill clearly and the price he offered was not low. Su Shen indeed did not have too many items to hide.

I told him some of my suggestions for improvement.

This is how Blake came to be today.

In certain aspects.

Especially in sports research and medical teams.

It cannot be ignored.

Blake believed it even more.

This is Su Shen's side.

Even if this is their opponent.

He was also willing to believe more.

It’s not that I think Mills’ teaching level is bad.

I simply think that everyone has their specialties.

Su Shen is a young leader in this industry.

Then you will be able to see things that Mills cannot see and understand solutions that Mills does not understand.

Especially the areas where I felt uncomfortable before.

After several consultations with Su Shen, it was almost completely destroyed.

With the dual blessing of fame and facts.

Blake couldn't bring herself not to believe him.

For example, Blake was given a piece of equipment, an intelligent starting block with adjustable angle developed by Su Shen Laboratory.

This starting block can provide real-time feedback on the ground-pushing force vector through pressure sensors, assisting athletes in dynamically adjusting their posture.

Of course Blake was very sensible and transferred the money immediately after receiving it.

Whether Su Shen wants it or not, he will settle the account clearly.

This actually made Su Shen feel a little embarrassed.

He was also given an elastic knee support device.

This device can provide a reverse load of 30-50N at the start moment.

This is equivalent to reducing the pressure on the patellofemoral joint in disguise.

He also suggested that Blake purchase a batch of his own motion sensor equipment, set up an Achilles tendon tension warning, and establish a simple small system for individualized load monitoring based on the musculoskeletal model.

This is for Su Shen, who has the experience of two lives and knowledge of the future.

Maybe it's just a piece of cake.

But this is for Blake.

However, this is a problem that Mills and the scientific research and medical team here have not been able to solve for many years.

It can be solved in a few words.

Under the reality, he had to trust Su Shen more.

He is also willing to invest in his body. In this respect, he actually cherishes his body more than Bolt.

Bolt himself said that he rarely goes to bars and nightclubs.

It's more about training, or playing video games at home.

With these conditions.

That’s why Blake was born. He has become stronger and stronger in recent years.

More and more fulfilling the foundation of one's physical talents.

Otherwise, it's Jamaica's scientific research and medical conditions.

Even Su Shen helped him avoid the biggest injury in his career.

If this continues, it will be hard to avoid some minor problems.

And now?

There are fewer and fewer minor problems.

Blake can have a healthier body posture.

To train and improve.

Just let him pay Su Shen at the same speed every time.

It is also becoming more and more efficient.

Even sometimes when sending emails.

The email hasn't come yet, but the payment has already arrived.

I can only say that Blake is really dedicated to this aspect and is very efficient.

It's a pity that this is the field.

There are many experts who are good at starting.

Even he avoided these problems.

Even with Su Shen's paid consultation, my body is getting healthier and healthier.

But it is still difficult to compare him with those startup bosses.

For example, Powell on the other side.

Powell is a typical example.

Although his skills were crude in the early years, he created his own explosive start.

Do you think it's outrageous? The technology is crude.

Can you also create your own technical system???
Is this statement reasonable?
But he has good physical talents and can create it on his own.

There's no use in being envious.

And after these few games, his condition has recovered a lot.

He also wanted to recover from this battle in Lausanne.

At least it has returned to the ranks of giants in one fell swoop.

Lay the foundation for Moscow's all-out attack.

In this regard, he was actually prepared earlier than Gan Guy.

Guy here.

It is indeed because the American team has no one this year.

He has to leave the mountain.

And I am indeed getting older, and this year is my last major competition in the last two years.

It would be better to try for another year.

Then have a good rest.

This is Lao Bao.

That's a display of talent.

When Powell starts his first step, his front leg is bent at a large angle of 130°-140°, and his quadriceps enter the concentric contraction phase.

Since the muscles have been stretched to 1.2 times their resting length during the preparation phase, they are at the peak of the tension-length curve, and the efficiency of the quadriceps cross bridge is maximized at this moment.

Generates a pushing force of up to 4-5 times body weight.

When the hind leg is straightened, the 437.5J elastic potential energy stored in the Achilles tendon is completely released within 0.05 seconds and superimposed on the active contraction force of the triceps surae.

Forming an "explosive ejection" effect.

Follow the 0.01 second timing difference of "ankle-knee-hip".

0.15 seconds at the end of the first push-off, after the ankle joint completes 90% of the plantar flexion, the knee joint begins to extend and exert force.

At this time, the torque generated by the contraction of the quadriceps is transmitted through the tibia and forms a combined force with the calf muscles that are still exerting force.

The second step.

The hip joint starts to extend at 0.2 seconds, increasing the total thrust of the lower limbs to 1800-2000N.

This whipping force increases the length of the second step from 0.8m to 1.0m.

third step.

As speed increases, Powell adjusts the forward lean of his torso from 35 degrees to 45 degrees to optimize the trajectory of his center of gravity.

At this time, the combined force angle of the ground push increases slightly to 38°, which ensures the horizontal propulsion while providing the necessary vertical force to maintain the flight. The arm swing range increases to 145°.

The swing frequency is increased to 4.2 times per second.

Generates angular momentum of 1.2kg·m·rad/s.

Used to offset the rotational torque generated by the lower limbs pushing off the ground.

The dentate nucleus of the cerebellum enters a highly active state, regulating the firing rate of spinal motor neurons.

The phase-locked coupling of the auditory-motor cortex continues to play a role, ensuring that the timing of each step's landing is precisely matched to the running rhythm. At this time, the muscle recruitment mode changes to a combination of size principle and reverse recruitment, taking into account both power output and continuous acceleration.

the fourth step.

In the fourth step, Powell made full use of the kinetic energy accumulated in the first three steps. Although the force of pushing off the ground dropped to 1400-1600N, he maintained a high speed by extending the pushing off time and increasing the step length.

At this time, the forward tilt angle of the torso is maintained at 45°, and the projection point of the center of gravity is located 10 cm in front of the sole of the foot, forming a stable acceleration posture.

Powell's first four steps achieved a smooth transition from start to high speed through precise muscle mechanics regulation, efficient neural recruitment strategy and reasonable energy metabolism distribution.

You can't help but accept it.

Maybe people don’t understand this.

But the technical feature is——

Each step makes full use of the superimposed effect of muscle elastic potential energy and active contraction force.

The timing error of the three-joint extension and extension is controlled within ±5ms.

The loss rate in the energy metabolism system conversion process is less than 15%.

Neural regulation achieves motion synchronization accuracy of 0.01 seconds.

This innate technique, which combines biomechanical principles with neuromuscular control, enables Powell to reach speeds within 0.6 seconds after starting, which would take the average athlete 0.8 seconds to achieve.

Establish a clear leading advantage.

Do you think he understands this principle? Actually, he doesn't.

Powell couldn't explain it either.

But once tested, it was found that his mathematical model of center of gravity displacement was excellent.

Angular momentum compensation for arm swing,

The moment of inertia of the arm is I = 0.8 kg·m.

The angular velocity of the swing is ω=4.2×2π rad/s.

Greatly offset the rotational torque generated by the lower limbs pushing off the ground.

Not to mention the force of pushing off the ground in the first step.

Nerve conduction velocity.

Achilles tendon stiffness.

and many more.

They are all naturally excellent.

This is what is called the natural talent of West Africans.

And Powell is clearly the most gifted person among West Africans.

This time he shot, he felt that he was really serious.

The feeling I gained shot by shot in the previous games began to be summarized here.

You can tell by comparing his start with Blake's.

The gap is really too big.

Ridiculously big.

And this year Powell has even more experience here.

The technical sense of the work is more refined.

He is more delicate than when he was young.

Let the sense of activation burst out from him.

For a moment, he was not much inferior to Carter.

Top it.

So many super strong men burst into action.

One after another is the best.

Even Zhao Haohuan, who started with bent arms, completely lost his style here. It's not because he is not good enough, but mainly because these people are too good.

There is too much talent to start.

but……

The real protagonist.

This is just the beginning.

If it weren't for him, this shooting would definitely be a riot of demons.

Warlords divided the country into different factions.

Everyone has their own characteristics.

But once this person appears.

Everyone can speak.

No matter how well you do.

How strong the talent is.

What a sophisticated technique.