The Su God of the Reopening of the Sports Arena

Chapter 2505 The Ultimate Move to Counter Super Speed! Twin Peaks Speed, Activate!

It was different from what everyone expected.

There wasn't much of a high-speed competition in this race.

Because after Bolt activated the fourth stage of his six-second burst, he was in a completely overwhelming position.

Furthermore, under the same high-speed burst conditions, early-stage players are definitely not as good as late-stage players.

So here it is.

Even though Su Shen had created a significant advantage earlier.

It is still being rapidly eroded.

It made the viewers anxious and impatient.

After all, this is the Bird's Nest.

Every one of us is a Chinese citizen.

It's inevitable to feel anxious when you see your athletes gradually being overtaken.

The same applies to professionals.

Because so much of it gets swallowed up at high speed.

After entering the later stages.

It will probably be even more difficult to sustain.

It looks like Bolt has evolved again.

It will once again reach the top of the world.

Red lightning.

Even they couldn't hold on any longer.

but……

This is not because there is a problem with Su Shen's technique.

in fact.

The whole thing has entered an excellent state.

Just compare them again.

I ran into Bolt in this area.

Don't talk about him.

Anyone who comes will die.

This is a man who can break 46km/h at top speed.

No one can defeat him in a single blow.

Fortunately, Su Shen knew this concept, and Randy knew it too, but the others who didn't understand it so clearly didn't.

So they are worried right now.

After all, in the ultimate showdown of sprinting, the 50-70 meter speed zone is the stage where athletes' speed potential is concentrated and exploded, and it is also the ultimate arena for the contest of technical efficiency and physical talent.

Falling behind here means it's easy to be at a disadvantage throughout the entire game.

Although the delayed head-up rearward technique in the ultimate frontal technology system used by Suarez is an innovative achievement of modern sprinting technology.

While it has significant scientific value in improving the ability to maintain speed in the later stages of a race, it is difficult to demonstrate its technical advantages in the 50-meter and 70-meter speed ranges when competing against Bolt.

It even appears "inconspicuous".

But that doesn't mean it.

This phenomenon is not due to a failure of the technology itself.

Rather, it is the result of the interplay of multiple competitive elements.

Bolt's superhuman physical talent has created an insurmountable speed barrier. His unique speed curve and energy metabolism pattern form a differentiated competitive logic. Combined with the special biomechanical environment and visual perception bias in the extreme speed zone, the technological benefits of Suarez's delayed head-up rear-mounted technology have been obscured so far.

However, it should be emphasized that this technological advantage is merely being masked.

It hasn't disappeared.

However, when making comparisons, people's attention and judgment are prone to deviation.

This is also a common misconception that humans, as animals, often make when making subjective judgments.

The core competitiveness of sprinting is always based on body shape and physiological function. Technique, as a tool to amplify efficiency, has its limitations limited by the athlete's natural talent.

Bolt's innate physical attributes created a "hard power barrier" that was difficult for delayed head-up and rear-end techniques to overcome, diluting Suarez's technical advantage in the 50-meter and 70-meter speed zones due to the difference in natural talent.

The speed change trajectory throughout a sprint is a comprehensive reflection of an athlete's technical system, physical talent, and energy metabolism characteristics.

The starkly different speed profiles of Suarez and Bolt make it difficult to highlight the technical value of delayed head-up technology in the 50-meter and 70-meter top speed range.

Its essence is a clash between two competitive logics.

Sushen achieves "high-efficiency acceleration - slow deceleration" through technical optimization.

Bolt, on the other hand, achieved "smooth acceleration and long-term peak" thanks to his natural talent.

The latter's curve characteristics create a stronger visual and competitive dominance in the high-speed zone.

So what exactly are the key features of this technology?

Is that all there is to it?
Is it merely an extreme front-side mid-delay head-up rear camera technology?

Of course not. If that were the case, there would be no need to use it as a last resort.

The reason for doing this is...

To push one's body to a new technical level.

called——

A double-peak eruption.

To understand what a bimodal growth pattern is, you first need to understand what a bimodal athlete is.

Bimodal?
In the technical research and competitive analysis of sprinting, the speed curve is a core indicator for measuring an athlete's speed distribution strategy, technical effectiveness, and physical adaptability throughout the race.

Different athletes have vastly different speed curves, but Suarez's "double-peak" speed curve is a typical product of his maximizing development of his physical talent by relying on the delayed head-up and rear-positioning technique in the ultimate frontal technique system.

It is also a concrete manifestation of the competitive logic of compensating for talent with technology and achieving "winning through skill." Compared to the "dam-shaped" speed curve of naturally gifted athletes like Bolt.

Suarez's "double-peaked" speed curve has a unique formation mechanism, biomechanical implications, and competitive value.

Its essence is an innovative path for athletes to break through performance bottlenecks by reshaping speed and improving rhythm through technical intervention when their physical conditions are limited.

The speed curve in sprinting is a graph showing how an athlete's speed changes over distance from start to finish. The horizontal axis represents the distance or time traveled, and the vertical axis represents the instantaneous speed.

Traditionally, the ideal sprint speed curve is considered to be "single-peak"—the athlete accelerates rapidly after the start, reaches peak speed in the middle of the race, then enters a brief plateau, and finally slows down slightly before the finish line. The core characteristic of this curve is "one-time acceleration and sustained peak speed," which is typically exhibited by gifted athletes with exceptional muscle strength and limb leverage.

That is, someone like Bolt.

He is the limit of this type.

That was in my previous life.

This is even more true in this lifetime.

So you can't beat him in his area.

So what you need to do is—

To start anew.

Start a new track.

Correct.

This is what Su Shen wanted to do.

I'm not as good as you on the same track.

Then I'll switch to another one to fight you.

And the "double-peaked" velocity curve.

This breaks with this traditional understanding.

It exhibits a unique trajectory of "two accelerations and two surges".

So?

What is meant by bimodal?

Specifically, the morphological characteristics of the "double-peaked" velocity curve can be divided into four stages:

The first stage is the initial acceleration phase from the start to the middle stage, which is the first speed increase phase. After the starting gun fires, Su Shen relies on the support of the starting blocks and the tension transmission of the forearm fascial chain to quickly complete the forward shift and conversion of the body's center of gravity. The lower limbs push off and swing in coordination, and the speed quickly increases from a stationary state, forming the first speed increase slope.

After the speed reaches the first peak, it does not enter a deceleration phase as quickly as traditional technologies do. Instead, it enters a short speed buffer period by relying on the low center of gravity control of the delayed head-up technology.

During this phase, the speed neither increases significantly nor decreases markedly, but remains relatively stable, accumulating energy for the second acceleration.

Then comes the second phase of speed increase, from the early stage of mid-race acceleration to the early stage of the middle run. Through the stable support of the core muscles and the optimization of the forward hip movement, the body's energy reserves are mobilized again to drive the speed to increase again, forming a second speed peak. This is also the maximum speed range of Su Shen throughout the entire race.

Finally, from the later stages of the race to the finish line, the speed gradually decreases. Relying on the motion economy and momentum provided by the delayed head-up technique, the speed reduction is kept to a minimum.

Compared to a "single-peak" speed curve, the core difference of a "double-peak" speed curve lies in the rhythm and stages of speed increase.

The "single-peak" curve is an acceleration that is "all at once," relying on the absolute explosive power of physical talent.

In contrast, the "bimodal" curve represents a gradual acceleration, controlled by technological adjustments. This difference is visually apparent in that the "single-peak" curve has only one distinct velocity peak, with a relatively long plateau period around that peak.

The "double-peak" curve has two speed peaks. The first peak is the result of the body's instinctive exertion, and the second peak is the product of technological empowerment. The buffer period between the two peaks is the key node for technological intervention and physical adaptation.

From a visual perspective, the "bimodal" velocity curve presents an "M" shape outline on the graph, while the "single-peak" curve presents a "∩" shape outline.

Behind this difference in form lies a fundamental difference in the athletes' energy allocation strategies and technical movement patterns throughout the entire process. Suarez's "bi-peak" speed curve is not a compromise due to a lack of talent, but rather a proactive choice resulting from technical optimization.

By accelerating in stages, the energy reserves of the phosphagen system can be avoided from being depleted prematurely.

This allows for efficient maintenance of speed in the later stages of the race.

The formation mechanism of the "double-peak" velocity curve.

This is... the core enabling technology of delayed head-up.

The formation of the "double-peak" speed curve is not accidental, but the inevitable result of Su Shen's long-term practice of delayed head-up technology.

The delayed head-up rearview technology, as the core of the ultimate front-side technology system, is based on three dimensions: biomechanics, energy metabolism, and neuromuscular regulation.

It provides comprehensive support for the construction of the "bimodal" velocity curve, and its mechanism of action runs through the four stages of the velocity curve.

The first stage.

Low center of gravity attitude control: a technical guarantee for the speed buffer period after the first peak.

In traditional sprinting techniques, athletes often quickly raise their heads and stand upright after the start. The drawback of this technique is that the center of gravity shifts upward too early, causing the acceleration phase to end prematurely, and the speed quickly enters a deceleration phase after the first climb.

The core requirement of delayed head-up rear-positioning technology is to maintain a low center of gravity and forward lean posture until the early stages of the race.

This attitude control provides crucial support for the buffer period following the first speed peak.

A low center of gravity and forward lean posture optimizes the push-off direction, converting more of the force generated by the lower limbs into horizontal propulsion rather than vertical lift. After the initial speed peak, the athlete's muscles begin to experience slight fatigue. If an upright posture is adopted at this point, the horizontal propulsion will decrease rapidly, and speed will naturally decline.

A low center of gravity posture can maintain the body's dynamic balance through continuous activation of the core muscles, keeping the horizontal propulsion force at a relatively stable level and thus avoiding a sharp drop in speed.

A low center of gravity reduces air resistance and lowers the rate of energy consumption, thus allowing sufficient energy to be stored for a second acceleration.

Even from the perspective of neuromuscular regulation, the delayed head-up technique, through long-term specialized training, enables athletes to develop stable neuromuscular memory. After the initial speed peak, the neuromuscular system can precisely control the contraction and relaxation rhythm of muscles, avoiding excessive co-contraction of agonist and antagonist muscles and reducing ineffective energy consumption.

This precise control allows the muscles to recover adequately during the buffer period, preparing them for the second acceleration.

Phase Two.

Tension transmission of the forearm fascial chain: the power source of the second velocity peak.

If low center of gravity posture control is the foundation of the "double-peak" speed curve, then the tension transmission of the forearm fascial chain is the core driving force of the second speed peak.

As an important branch of the anterior lateral chain, the forearm fascial chain connects the muscles of the hand, forearm, upper arm and anterior trunk. Its tension state directly affects the coordination efficiency of upper limb swing and lower limb push-off.

If we say that during the buffer period of the first speed peak, Su Shen maintained the forearm fascial chain with appropriate tension through the arm-bending and arm-swinging movement pattern.

This pre-stretched fascial chain is like a spring ready to be released, capable of quickly releasing tension during the second acceleration. When he enters the second acceleration phase, the speed and amplitude of the upper limb swing increase simultaneously, and the tension of the forearm fascial chain is transmitted to the lower limb through the torso, driving the hip forward movement and the coordinated force of the lower limb push-off and swing, thus forming a force transmission chain of "upper limb leading lower limb, torso transmitting power".

This power generation pattern can effectively mobilize the body's synergistic muscle groups to participate in the work, making up for the lack of strength in a single muscle group.

This will drive the speed to increase again, forming a second speed peak.

Compared to the straight-arm swing technique of traditional methods, the forearm fascial chain tension transmission in the bent-arm swing mode after the punch is more efficient and consumes less energy. The straight-arm swing leads to power dispersion and easily causes shoulder muscle fatigue.

The difference is that bending the arm and swinging the arm makes the arm swinging movement more rhythmic and stable. The tension transmission of the fascial chain can reduce the ineffective work of the muscles, so that more energy can be used to increase speed.

This efficient power generation mode is the key to Su Shen's ability to accelerate again after the first acceleration.

The third phase.

Optimized regulation of energy metabolism: the physiological basis of two accelerations.

The energy supply in sprinting relies on the anaerobic metabolic system, in which the energy efficiency and reserves of the phosphagen system directly determine the athlete's acceleration ability. The traditional "single-peak" speed curve depends on the one-time burst of energy supply from the phosphagen system. The drawback of this energy supply mode is that energy is consumed too quickly, which can easily lead to insufficient energy reserves in the later stages and a greater drop in speed.

The formation of the "bimodal" velocity curve is due to the optimized regulation of energy metabolism brought about by the delayed head-up technology, which realizes the staged energy supply of the phosphagen system.

During the initial acceleration phase, Su Shen controlled the energy consumption rate at a relatively low level through technical adjustments. A low center of gravity posture and efficient use of the forearm fascial chain reduced ineffective energy consumption, ensuring that the energy reserves of the phosphagen system were not depleted during the first acceleration.

After entering the buffer period, the body's energy metabolism system enters a brief adjustment phase. During this time, some of the energy in the phosphagen system is rapidly restored, providing a physiological basis for the second acceleration.

In the second acceleration phase, the energy metabolism system is activated again, with the phosphagen system and anaerobic glycolysis system working together to provide energy, driving the speed to increase again.

This phased energy supply model avoids the drawbacks of traditional technologies, such as "one burst followed by complete exhaustion," and significantly improves energy utilization efficiency.

The delayed head-up technique can slow down the rate of lactic acid buildup and reduce the impact of lactic acid on muscle contraction efficiency.

During the second acceleration phase, although the proportion of energy supplied by the anaerobic glycolysis system increased, the rate of lactic acid accumulation was slowed down, and muscle fatigue was effectively controlled, thus ensuring the continuity and stability of the second acceleration.

Phase Four.

It is also the most crucial one.

Elastic release of the hip kinetic chain: continuation of peak speed and efficiency guarantee during the sprint phase.

The complete construction of a "double-peak" velocity curve requires not only the formation of two velocity peaks, but also the effective delay of velocity decay after the second peak, and the elastic release mechanism of the hip kinetic chain.

This is the core technology supporting speed stability during the sprint phase, and this mechanism is also deeply empowered by delayed head-up technology.

From a biomechanical perspective, the low center of gravity and forward lean posture maintained by the delayed head-up technique continuously optimizes the kinematic trajectory of the hip, ensuring that the hip joint remains within the range of moderate flexion for power generation. In traditional sprinting, once the athlete enters the sprint phase, the center of gravity straightens too early, forcing a greater range of hip extension. This causes the hip muscles to shift from a highly efficient "elastic energy storage-release" working mode to an inefficient "simple isotonic contraction" power generation mode, resulting in decreased muscle work efficiency and a faster rate of speed decay.

The delayed head-up and rearward positioning technique, with its low center of gravity and forward lean, limits excessive hip extension, ensuring that the junction of the posterior and anterior hip fascia chains at the hip is always in a pre-stretched, elastically stored state. When the lower limb completes the push-off motion, the elastic potential energy of the hip fascia chains is rapidly released, creating a synergistic effect with the force of the active muscle contraction. This enhances the propulsive force of each step while reducing the energy consumption of the active muscle contraction.

In other words, the delayed head-up technique, through long-term specialized training, strengthens the neural coupling between the hip muscles and the core muscles. During the sprint phase after the second speed peak, the neuromuscular system can precisely control the contraction sequence of the hip extensors and flexors, avoiding excessive co-contraction of antagonistic muscles, making the hip flexion and extension movements more rhythmic and fluid.

This precise neural regulation effectively maintains the stability of stride frequency and stride length, preventing a sudden drop in speed caused by a decrease in stride frequency or a shortening of stride length. At this point, as long as the core muscle groups are continuously activated, the trunk posture can be further stabilized, the longitudinal sway of the body can be reduced, and air resistance and energy loss can be decreased, thereby prolonging the plateau period of the second speed peak.

This ultimately results in a high-quality velocity curve characterized by "prominent double peaks and gradual decay".

Not to mention the elastic release mechanism of the hip kinetic chain.

Essentially, it is a highly efficient process of mechanical energy conversion and reuse. The elastic energy storage and release process of the fascial chain does not rely on the energy supply of the anaerobic metabolic system, but converts the reaction force of the ground when pushing off the ground into elastic potential energy stored in the fascial tissue, and releases it in the subsequent swinging and extension phases.

This "passive energy storage-active release" working mode can effectively reduce the proportion of energy consumption by the phosphagen system and anaerobic glycolysis system, delay the onset of muscle fatigue, and provide key energy support for maintaining speed during the sprint phase.

At this point, we can assess the compatibility between the elastic release of the hip kinetic chain and the coordinated push-off and swing of the lower limbs.

Closed-loop optimization of sprint technology.

From the perspective of motor coordination mechanism, the low center of gravity and forward tilt posture maintained by the delayed head-up rear-positioning technique not only optimizes the force trajectory of the hip itself, but also constructs a top-down coordinated force transmission path of "trunk-hip-knee-ankle".

During the sprint phase, the release of elastic potential energy from the hip fascia chain during lower limb extension is precisely synchronized with the power generation sequence of ankle plantar flexion and knee extension. When the posterior hip fascia chain releases elasticity to generate push-off force, the knee extends naturally, and the ankle fully extends, layering the elastic force transmitted from the hip with the active contraction force of the lower limb muscles to form a "hip-dominant, knee-ankle coordinated" push-off power generation pattern. This avoids the problem of disconnection between hip power generation and knee-ankle extension, and interruption of power transmission, which is common in traditional techniques, significantly improving the effective propulsive force of each push-off step.

At this moment.

The elastic release of the hip kinetic chain also simultaneously optimizes the efficiency of lower limb swinging movements.

During the swing phase after the push-off, the elastic rebound of the anterior hip chain, iliopsoas-rectus femoris-anterolateral thigh fascia can actively pull the thigh to swing forward quickly, completing the swinging motion without excessive active muscle contraction. This maintains stride frequency and shortens the energy consumption of the swing phase.

This coordinated mode of "elastic release of energy during push-off and elastic rebound of assistance during swing" enables the lower limb push-off and swing movements to form an efficient closed loop, ensuring that stride frequency and stride length remain in dynamic balance during the sprint phase, and further delaying speed decay.

This will make the plateau period of the second growth peak more stable and longer-lasting.

That sounds so incredible, but are there any real-world examples of it?

Yes, there was one, but not in 2015, but in Tokyo 78 years later.

A man named Jacobs.

It takes the bimodal type to its extreme.

It is also the only one in history.

Therefore, his meteoric rise to fame was astonishing.

If I really have to give an example...

That was the real-life Jacobs.

Then another question arises: Jacobs is a better runner in terms of speed and the later stages of the race. It's not that he's not good at the beginning of the race, after all, he did beat Coleman in the beginning of the race.

But the Coleman he defeated was clearly a Coleman who had just recovered.

This can be seen from the results of the matches.

He had absolutely no chance of winning against a prime Coleman.

Therefore, if you simply copy Jacobs' model...

That would definitely be a dead end.

Because the two people have different 100-meter running styles.

The significance of science lies in its ability to combine and adapt various theories to athletes with different physiological conditions.

This is the true meaning of the scientific research movement.

There are many similarities, after all, they both follow a bimodal pattern, such as their core shape.

The "M"-shaped velocity trajectory exhibits non-monotonic decay.

For example, the fundamentals of biomechanics.

Both involve the elastic storage and release of energy in the hip kinetic chain.

For example, constructing a "bimodal" speed curve requires the neuromuscular system to precisely control step frequency and step length to avoid speed decay caused by a drop in a single indicator.

Both Suarez and Jacobs possess excellent neuromuscular coupling ability, enabling them to maintain a dynamic balance between stride frequency and stride length throughout the race, thus ensuring the smooth transition between two speed peaks.

For example, they all use front-side techniques and front-side power generation modes.

Now that we've discussed the commonalities...

The most important thing is the difference.

After all, just because a theory works for one person doesn't mean it can be replicated for another.

This is a no-brainer.

Do you want to thoroughly study the bimodal communication model used in Jacobs and apply it to yourself?
This requires scientific analysis, theoretical deconstruction, and reconstruction, combined with one's own physiological conditions and functions.

Otherwise, blindly copying will only lead to misguided attempts.

The core difference between Suarez's and Jacobs' "bimodal" speed curves lies in—

The fundamental difference between proactive modification and natural adaptation.

Suarez's "bimodal" speed curve is the product of proactive technical transformation driven by scientific training, while Jacobs' "bimodal performance" is the result of natural adaptation based on physical condition and specialized foundation. This essential difference determines that the core logic of their technical systems is different.

Jacobs' "bimodal performance" lacks a systematic technical transformation background and relies more on the natural adaptation of physical condition and professional foundation.

Jacobs initially focused on the long jump, possessing excellent hip explosiveness and ankle support. After transitioning to sprinting, his technique retained the core characteristics of the long jump: fast hip extension rate, sufficient landing cushioning, and large stride length.

Moreover, as the 2022 World Indoor Championships 60m champion, he has outstanding short-distance acceleration ability and extremely high efficiency in the first 10-30 meters after the start, enabling him to quickly reach his first speed peak.

The powerful hip muscles and elastic potential energy reserves developed through long jump training allow the athlete to maintain and further increase speed naturally in the middle and later stages without needing to make deliberate technical adjustments.

Sports technique analysis shows that Jacobs' technique lacks the refined modifications of Suarez. Indicators such as head lift timing and hip angle changes are all in a natural state. His "double-peak" curve is the result of the natural integration of physical function and sprinting technique, rather than an optimized form formed by actively correcting technical defects.

Su Shen found that his sprinting technique system had several core weaknesses that limited his speed limit and stability in the later stages. The core problems were concentrated in three dimensions: posture control during the acceleration phase from the start, release of stride length potential, and efficiency of hip kinetic chain power generation.

The overall technique exhibits typical empirical characteristics, lacking precise biomechanical control. This is reflected in the speed curve as a standard single-peak decay pattern. Although it has extremely strong explosive power in the initial acceleration phase, it lacks effective technical support to maintain high speed after reaching maximum speed. In the later stages, due to muscle compensation and rapid energy depletion, the speed decay rate is significantly higher than that of top athletes of the same period.

They consistently struggled to achieve a substantial breakthrough in performance in the later stages.

At least not at his level.

Before two years of intensive training, Su Shen's technical weaknesses were clearly interconnected:
Looking up too early after the start causes the torso to straighten prematurely, disrupting the optimal acceleration posture of low center of gravity and forward lean. This not only damages the integrity of the power transmission chain from the torso to the hip, knee, and ankle, but also prematurely terminates the inertial superposition effect during the acceleration phase.

In the key stride frequency and stride length combination in the first half of the race, the stride length extension in the first few steps was seriously insufficient. The problem of the small stride length base directly limited the efficiency of acceleration in the early stage, making it impossible to quickly establish a speed advantage in a short distance. Moreover, the lack of scientific rhythm in stride length increase further aggravated the energy consumption in the acceleration phase.

The most crucial hip kinetic chain component suffers from a lack of precise constraints on hip joint movement trajectory, resulting in insufficient matching between flexion/extension range and force exertion timing. Consequently, core hip muscles such as the gluteus maximus, iliopsoas, and hamstrings are unable to enter an efficient elastic energy storage-release cycle, instead relying primarily on simple isotonic contraction to generate force, leading to low efficiency in muscle group synergy.

The inability to fully convert ground reaction force into propulsion and the accelerated muscle fatigue became the core cause of slowdown in the later stages.

Over the past two years, Randy's team and Su Shen have worked together to conduct a comprehensive and precise diagnosis of Su Shen's technical shortcomings based on a mature champion model. They have built a systematic technical transformation system from four dimensions: force exertion posture, trajectory control, power transmission, and muscle group activation, forming a highly targeted and personalized optimization plan.

Starting from the start, the focus is on optimizing the starting block layout logic. By adjusting the distance and angle between the front and rear foot plates, the initial force angle of the hip and knee joints is increased in a targeted manner, so that the force direction at the moment of take-off is more in line with the forward movement trajectory of the body's center of gravity, reducing the loss of force components.

This allows the ground reaction force during the starting phase to be converted more efficiently into forward propulsion, laying a solid foundation for the acceleration phase following the start.

In terms of core posture control, a breakthrough technology of delayed head lifting is introduced, abandoning the traditional paradigm of raising the head early during the acceleration phase. The key point of upright torso is moved back significantly, maintaining a low center of gravity posture with moderate forward tilt of the torso throughout the process, extending the optimal acceleration range, and ensuring that the body's center of gravity is always in the inertial channel of forward acceleration during the acceleration phase, avoiding acceleration interruption and power transmission loss caused by upright torso.

In terms of strength and technique training, a gradient resistance acceleration running training system is adopted. Through precise adjustment of differentiated resistance loads, the ability to actively extend stride length is strengthened in a targeted manner, breaking through the inherent stride length bottleneck.

At the same time, it focuses on deeply strengthening the hamstring muscles and ankle joint support and force generation ability to make up for the weakness in the power generation of the later push-off, and further strengthens the coordinated force generation mode of the hip muscles and core muscles through special training.

Optimize the timing of force application and transmission efficiency of the hip kinetic chain.

After several years of training, this systematic and scientific technological transformation system has achieved a fundamental leap in the Sushen technology model, from experience-driven to precise biomechanical regulation.

The effectiveness of core technologies has been qualitatively improved.

Through postural constraints and synergistic muscle training, the efficiency of elastic energy storage and release in the hip kinetic chain is significantly improved, the superposition effect of the fascial chain and muscle contraction is fully manifested, and the force exertion efficiency is greatly enhanced.

At the neuromuscular level, the neural coupling between the hip core muscles and the trunk core muscles is substantially improved. The timing of muscle contraction, activation level, and antagonistic muscle inhibition are more precisely controlled, completely eliminating the problems of muscle compensatory force exertion and excessive co-contraction in traditional techniques, and achieving a high degree of synergy and smooth transmission of force. This is achieved through the systematic correction of the shortcomings of core techniques, the scientific reconstruction of the force exertion mechanism, and the comprehensive optimization of exercise efficiency.

This allowed Su Shen to successfully break through the constraints of traditional technology systems, completely break free from the shackles of the single-peak decay speed curve, and construct a high-quality speed curve shape with prominent double peaks and gentle decay.

This technological transformation is by no means a simple adjustment of movements, but rather the result of proactive optimization based on biomechanical principles and neuromuscular regulation laws. It is a deep integration of precise correction of technical defects and ultimate exploration of exercise efficiency.

There's no way to avoid this.

It's impossible.

Don't just say you'll do it.

Even getting started is impossible.

Secondly, the peak speed characteristics are different.

Su Shen's style is characterized by "high initial speed followed by a steady pace" and is different from Jacobs' style of "flat peaks and consistent speed throughout".

The core criterion for determining a bimodal speed curve in sprinting is that two clear speed peaks must be formed throughout the race, and both peaks must be in the high-speed range throughout the race, with only a brief and slight decrease in speed at the transition between the two peaks. It is not a single peak followed by a secondary peak, which is the core difference between the two.

Essentially, it's about the differences in the peak gradient of the bimodal structure, the connection logic, and the technical orientation regarding the continuity of the later stages.

It presents a clear technical distinction between "high speed at the beginning and stable speed at the end" and "flat speed at both peaks and stable speed throughout".

Suarez's bimodal speed curve exhibits typical technical characteristics of "high speed at the beginning and stable speed at the end," with a clear gradient difference between the two speed peaks, and perfectly matches the core criteria for judging a bimodal speed curve in sprinting.

Its first speed peak is the ultimate peak speed of the entire journey. Relying on the long-distance low center of gravity acceleration mode built by the delayed head-up rear-position technology, the first high-speed peak is formed at the end of the acceleration segment. This peak is the concentrated release of its front-end technical efficiency. By maintaining the forward-leaning posture of the torso, it breaks the technical constraints of the traditional early termination of the acceleration segment, allowing the acceleration inertia to be fully superimposed, thus breaking through its own speed limit and forming a front peak height far exceeding the norm.

During the transition between the two peaks, there was only a brief and slight decrease in speed, without any significant attenuation. This stability in the transition is due to the efficient connection of the elastic energy storage and release mechanism of the hip kinetic chain, which avoids the speed gap between acceleration and mid-running in traditional running methods.

Entering the final sprint stage, although the second peak speed is slightly lower than the first peak speed, its core value lies in "stabilizing speed" rather than "reaching higher". Relying on the stability of the core trunk and the continuous elastic output of the hip kinetic chain, the second peak speed is transformed into a stable high-speed plateau period, completely getting rid of the technical dilemma of traditional single-peak decay and maintaining a stable speed in the later stage.

Consolidating the advantages established in the early stages is essentially the implementation of the technical logic of maximizing the establishment of advantages in the early stages and precisely controlling the speed in the later stages to consolidate those advantages.

Jacobs' bimodal speed curve exhibits a distinct technical characteristic of "flat bimodal speed and stable speed throughout the entire range." The two speed peaks have no obvious gradient difference, which is a balanced high-speed output mode that perfectly matches the bimodal judgment criteria.

Its first speed peak is formed in the early stage of acceleration after the start. Relying on the explosive power and stride length advantage brought by its innate physical condition, it quickly completes the switch from standstill to high speed, forming the first high speed peak.

The speed fluctuation during the transition between the two peaks is minimal, with almost no significant deceleration. The speed curve transitions smoothly throughout the entire process. This is due to the balanced output of its hybrid energy supply mode and the natural elasticity of the hip muscles, which can maintain high-speed transitions without deliberate technical adjustments.

Its second speed peak is basically the same height as the first peak, with no significant difference. Moreover, the two peaks are not isolated, but are connected to form a long-distance, high-speed, stable range. Its core advantage lies in "steady speed" rather than "stage-by-stage acceleration". In the later stages, there is no speed decay, and it can maintain high-speed and uniform progress by relying on a stable combination of stride frequency and stride length and energy supply. It even has the potential to slightly increase speed in the later stages.

Jacobs's flat double-peak curve shape is essentially a high-speed and stable output with no weaknesses throughout the entire process. He relies on his physical ability to achieve no significant fluctuations in speed throughout the entire process. With his ability to maintain a stable speed over an extremely long distance, he can overtake his opponents in the later stages. This is a manifestation of the technical logic of balanced power throughout the entire process and breakthroughs achieved by relying on stability in the later stages.

The core difference between the two bimodal forms is essentially a difference in the underlying technological logic and the adaptability of physical abilities.

Su Shen's dual-peak logic is a technology-driven approach of "playing to one's strengths and avoiding one's weaknesses." By relying on refined technological modifications, he amplifies his early-race acceleration advantage and uses a dual-peak model of "high-speed boost + stable speed" to compensate for his inherent weakness in physical ability in the later stages. He optimizes his speed curve through precise technological control.

Jacobs's bimodal logic is a "balanced output" driven by ability. It relies on the explosive power, speed maintenance and energy supply advantages brought by his innate physical condition to achieve high speed throughout the entire process with a "two peaks in balance + steady speed throughout" mode. The bimodal shape can be achieved without any shortcomings.

The difference in the bimodal shape between the two reflects the two core development paths of the top sprinters' bimodal speed curve: one is the technology-driven gradient bimodal.

Second, the capability-driven balanced bimodal model represents the optimal technology choice that aligns with its own characteristics.

Then there's the hip kinetic chain mechanism, which is different.

There is a difference between "technology-driven" and "capability-driven" models.

Su Shen's hip kinetic chain operation is "technology-driven," meaning that through precise technical movement design, the hip kinetic chain is forced into a highly efficient and flexible working mode.

Its core technology is the delayed head-up and rearward positioning technique. This technique maintains a low center of gravity and forward lean posture, strictly limiting the movement trajectory of the hip joint to a moderate flexion range of 30°-45°, avoiding the fascial chain relaxation caused by excessive hip extension in traditional running methods. This technical constraint keeps the posterior hip chain—gluteus maximus-hamstrings-posterior calf muscles—and the anterior chain—iliopsoas-rectus femoris-anterior thigh fascia—always in a pre-stretched state. With each push-off, the elastic potential energy and the active muscle contraction force create a superimposed effect, increasing propulsion by 18%-20%.

Meanwhile, Su Shen strengthened the neural control of his hip muscles through specific methods such as running over small hurdles at fixed intervals and resistance training, ensuring that the timing of elastic release was completely synchronized with knee and ankle extension, forming a closed loop of "hip-led, knee and ankle coordinated" force generation. Sports biomechanical analysis showed that Su Shen's hip kinetic chain elastic release efficiency reached 67%, significantly higher than the 45%-50% of ordinary athletes. This high efficiency relies entirely on the precise control of his technique—without the constraints of techniques such as delayed head lift, the elastic working efficiency of his hip kinetic chain would decrease by more than 30%.

Jacobs' hip kinetic chain operation is "ability-driven," meaning it relies on innate muscle strength and elasticity to naturally achieve efficient elastic energy storage and release, with technical movements playing only a supporting role. Jacobs possesses exceptional absolute strength in his hip muscles, with a maximum contraction force of 420N for the gluteus maximus and an explosive force of 38N·m/s for the hamstrings. This powerful muscle capacity allows him to rapidly stretch the hip fascia chain during the landing cushioning phase, even without the constraints of delayed head-up techniques, through rapid hip extension, thus completing the energy storage process. His ankle joint support also ensures the smooth operation of his hip kinetic chain.

When landing, the ankle joint's cushioning range is controlled within 15°, effectively reducing energy loss and converting more ground reaction force into elastic potential energy of the hip fascia chain.

Unlike Suarez, Jacobs' hip kinetic chain elastic release timing relies more on muscle memory and physical instinct rather than technical force. His elastic release efficiency is 62%, which is lower than Suarez's, but thanks to his higher end-stage maintenance of absolute muscle strength, his propulsive force is still at the world's top level.

The advantage of this "ability-driven" operating mechanism lies in its strong stability and its resistance to the influence of competition intensity and physical condition. This is also the core reason why Jacobs is able to maintain a stable speed in continuous battles.

There is also the trunk posture control logic—the essential difference between dynamic forward tilt speed control and upright steady speed control.

The formation of the two bimodal curves relies on completely different trunk posture control logics. This is the implicit core difference that determines the connection of speed peaks and the stability in the later stages, and it is also a key dimension that has not been analyzed in depth before.

Throughout the entire race, Su Shen maintained a dynamic forward-leaning posture. His torso posture was not at a fixed angle, but rather underwent gradual fine-tuning as the acceleration phase progressed. The core logic was to use posture constraints to serve the construction and connection of the speed peak.

During the initial speed peak, the torso maintains a deep forward lean, combined with a delayed head-up technique, maximizing the extension of acceleration inertia and providing posture support for the initial surge. During the transition between the two speed peaks, the torso's forward lean angle is slightly adjusted but never fully upright to avoid speed loss due to an upward shift in the center of gravity, ensuring the continuity of power generation in the hip kinetic chain. During the second speed peak and the final sprint, the torso maintains a moderate forward lean, using continuous activation of the core muscles to counteract fatigue-induced backward leaning, transforming the second speed peak into a stable speed plateau. Essentially, this involves using dynamic posture control to actively manage speed; once posture is out of control, speed decay becomes immediately apparent.

Jacobs, on the other hand, adopted a steady, upright posture with a relatively small forward lean angle throughout the race and minimal fluctuations. The core logic was to leverage his physical advantages to achieve a natural, stable pace. After the start, he quickly transitioned his torso posture without needing to consciously maintain a deep forward lean, relying on the stride length provided by his height and the explosive power of his hips to quickly reach his initial speed peak.

During the transition between the two peaks and in the later stages, the torso remains basically upright. Relying on the strength of the hip muscles and the support of the ankle joint, the fluctuation of the center of gravity in the upright posture is offset. The speed can be maintained without technical adjustment. The posture control is a natural manifestation of the body's ability, rather than a technical design that actively adapts to the speed curve. The posture has a weak constraint on speed, and speed stability depends more on the body's instinct.

The sustainability of technology is one aspect of the difference between "high controllability" and "high dependence".

They formed Su Shen and Jacobs, both of which are different bi-peaked types.

Indeed, a bimodal growth pattern is not so easy to form, not even for Usain Bolt.

It requires extremely complex preparation, a high degree of technical skill, and physical strength.

The key is that front-side technology is still needed to drive it with front-side mechanics.

Bolt lacks this quality.

Therefore, Su Shen left this technology until so late before starting to promote it.

It's precisely because of himself.

It's also difficult to get the timing right.

If Jacobs is a two-peak athlete with a strong finish, then...

Then Su Shen is about to create the first promising double-peak movement in history.

Of course, by 2030, these two types will probably be the only ones in history.

We should examine and dissect historical exceptions, then integrate them with scientific theories.

What I'm doing is what I should do with my body after Su Shen comes over.

After so many years of physical preparation.

This ability is extremely taxing on the body.

After two years of final adjustments.

at last.

It can be displayed.

Then.

Usain Bolt is the first athlete in human history to achieve superhuman speed.

He was the first contestant to open the fourth door at lightning speed.

Now that Jacobs is no longer around...

Surprisingly, Jacobs hadn't even debuted yet.

So, the first athlete in history to achieve an extremely fast double-peaked physique.

It is about to be born.

Facing Bolt.

To unleash such a powerful move.

Prepare such special skills.

Of course.

because of him.

It's worth it for me to do this.

Feeling the intense heat behind me, like sparks carrying electricity.

Su Shen.

Following the established procedures.

They pulled out their trump card.

This trump card was actually revealed from the very beginning, but as I said before.

Previously, they were overshadowed by Bolt's incredible speed.

but.

That doesn't mean Su Shen.

I didn't use my ultimate skill.

But this is the ultimate move.

Its duration.

It's just a bit long.

all of a sudden.

You just can't tell.