The Su God of the Reopening of the Sports Arena

Chapter 2507 So... the miracle began!!!

Bang bang bang bang bang.

Well known.

In the 100-meter sprint, the 60-70 meter segment is a crucial transition point from the "acceleration phase" to the "finish sprint phase," during which most runners experience a significant drop in speed.

This phenomenon is not caused by a single factor, but is the result of a coordinated imbalance in multiple systems, including energy supply, physiological functions, technical movements, and bodily regulation.

A "transition fault" in the energy supply system.

From efficient energy supply to inefficient compensation.

The energy supply in sprinting depends on the orderly connection between two major anaerobic energy systems, and the 60-70 meter mark is precisely the weak point in this connection. In the first 50 meters or so, the body mainly relies on the phosphagen system for energy. This system rapidly regenerates ATP by breaking down phosphocreatine stored in muscles. It has the advantages of strong instantaneous energy supply and no accumulation of metabolic byproducts, which can perfectly match the explosive energy demand in the start and acceleration phases.

However, the energy reserves of the phosphagen system are limited, and it can only sustain high-intensity exercise for 6-10 seconds. By the time it reaches about 60 meters, nearly 70% of the ATP and phosphocreatine reserves have been consumed, and the energy supply efficiency drops sharply.

At this point, the glycolysis system needs to take over as the main energy source, producing ATP by breaking down muscle glycogen to maintain high-speed running, but this process has a natural limitation:

First, the energy supply rate is only 1/3 of that of the phosphagen system, which cannot meet the high power output requirements that need to be maintained after 60 meters. Second, the metabolic product lactic acid will accumulate rapidly, leading to a decrease in pH value and an increase in hydrogen ion concentration in muscle cells, thereby inhibiting the binding of actin and myosin.

It reduces the efficiency of muscle contraction, causing a feeling of fatigue such as "heavy legs and weak strength".

This "transition fault" in the energy supply system means that the energy supply in the 60-70 meter range cannot match the needs of maintaining speed, which becomes the core physiological basis for the speed drop.

More importantly, the differences in the energy reserves of different runners can amplify the rate of speed loss.

This is especially true for promising young players.

Runners with insufficient phosphagen system reserves will experience an earlier "energy gap," leading to a sudden and severe drop in speed after 60 meters.

Runners with weak glycolysis will experience a gradual slowdown, with a decrease in cadence and deformed movements, due to insufficient energy production and rapid accumulation of lactic acid.

"Fatigue overload" of the neuromuscular system.

From precise coordination to disordered regulation.

That's a big problem too.

Sprinting at high speeds relies on the efficient coordination of the neuromuscular system, but sustained high-intensity exercise in the 60-70 meter range can lead to double fatigue of this system, directly causing speed decline. From a neuromodulation perspective, the explosive acceleration in the first 60 meters requires the central nervous system to recruit a large number of motor units in a high-frequency firing mode, keeping fast-twitch muscle fibers contracting at high speed.

However, continuous neural excitation can lead to decreased synaptic transmission efficiency, delayed nerve signal transmission, and slower muscle recruitment. The original step frequency of 4.8-5.2 steps per second is difficult to maintain, which in turn leads to a reduction in power output per unit time.

From a muscular function perspective, the high-intensity push-off and swing of the 60-meter dash has caused mechanical fatigue of fast-twitch muscle fibers. Reduced muscle glycogen reserves lead to decreased muscle contraction strength, while lactic acid accumulation further exacerbates the "stiffness" of the muscles, resulting in a reduction in the range of motion of the hip and knee joints.

It drops from the ideal 70° to below 55°.

The ground reaction force during push-off is reduced. At the same time, the efficiency of the eccentric-concentric contraction conversion of the muscles decreases.

The ground contact time increased from <90 milliseconds before 60 meters to over 100 milliseconds.

The effective time for pushing off the ground is shortened, and the stride length decreases accordingly, resulting in a double decrease in stride frequency and stride length.

This directly leads to a decrease in running speed.

In addition, the coordination and balance between antagonist and agonist muscles is disrupted: the high-intensity exercise in the first 60 meters causes excessive fatigue in the agonist muscles of the legs (quadriceps femoris and gluteus maximus), weakens the inhibitory effect of the central nervous system on the antagonist muscles, increases the "internal friction" between muscles, further reduces running efficiency, and exacerbates the trend of slowing down.

Then comes the significant depletion of physical energy.

Especially for promising young players.

In the acceleration phase before 60 meters, runners' techniques revolve around maximizing speed, with the torso leaning forward, gradually increasing stride frequency, and coordinating arm swing and push-off, resulting in high technical efficiency. However, in the 60-70 meter range, physical fatigue and decreased energy lead to passive distortion of technique, causing a significant loss of energy.

This creates a vicious cycle of "fatigue - movement distortion - speed loss".

Then there is the "efficiency loss" of technical actions.

It will go from precise optimization to passive deformation.

Of course, the same applies to runners who finish late in the race. If you allocate too much energy to the beginning of the race, you will definitely slow down in the end.

The stronger you are, the smaller the percentage of speed reduction you will experience.

However, there is no issue with the speed not dropping.

This problem has been virtually unsolvable in the history of sprinting.

Because no one can break it.

Just like before, it was thought that humans could not reach 46 hours per kilometer.

They mean the same thing.

For early-stage athletes, it goes without saying that their physical reserves are incomparable to those of later-stage athletes. In this situation, with such enormous energy expenditure, how do you expect to cope?
So even if it's God Su.

The most common technological variations also include...

One is that the torso becomes upright too early.

The torso, which was originally gradually rising during the acceleration phase, returns to vertical position prematurely when fatigued. This causes the lever arm of the lower limbs to shorten when pushing off the ground, and the direction of the push-off changes from "forward and upward" to "upward." This reduces the horizontal propulsive force and increases the fluctuation of the center of gravity, thus exacerbating energy consumption.

Second, the arm swinging motion was out of control.

Fatigue causes tension in the upper limb muscles, changing the arm swing amplitude from "symmetrical front and back, height up to the tip of the nose" to "reduced swing amplitude, swaying left and right". This not only fails to provide coordinated power to the lower limbs, but also increases the body's rotational resistance and reduces running efficiency.

Third, the ground-pushing technique has deteriorated, changing from "rapid ground-pushing and rigid support" to "heel landing and insufficient push-off", which increases the ground braking effect, reduces vertical stiffness from 35-50kN/m to below 30kN/m, and significantly reduces effective propulsion, etc.

These technological transformations are not caused by subjective will, but rather by the body's "passive adjustment" in a state of fatigue, which further reduces energy utilization efficiency.

This exacerbated the already strained energy supply, ultimately leading to a greater drop in speed.

For example, if the stride length fails to compensate for the decrease in stride frequency, or if the center of gravity fluctuates too much, it will cause additional energy consumption.

These are typical examples of the loss of technical efficiency in the 60-70 meter range.

Not to mention the excessive energy expenditure in the preceding stages, which puts "double pressure" on the body's regulatory system, namely the cardiopulmonary load and metabolic imbalance.

They will all appear.

Not one will be missing.

Running at high speeds in the 60-70 meter range puts double pressure on the cardiopulmonary and metabolic systems, indirectly exacerbating the slowdown. From a cardiopulmonary perspective, the anaerobic exercise in the first 60 meters causes the body's oxygen debt to accumulate rapidly, with the heart rate approaching or exceeding 90% of the individual's maximum heart rate, and lung ventilation reaching its limit.

At this point, the muscles' demand for oxygen becomes conflicted with the oxygen supply capacity of the cardiopulmonary system. Blood oxygen saturation decreases, and the aerobic metabolism of muscle cells is insufficient to provide energy, leading to further reliance on inefficient glycolysis for energy, and an accelerated accumulation of lactic acid.

At the same time, breathing rhythm is easily out of control, resulting in "breath-holding" or "shallow and rapid breathing", which leads to the untimely expulsion of carbon dioxide, causing discomfort such as chest tightness and dizziness, and affecting the normal exertion of muscles.

Therefore, it was once considered in the sports science community as...

Once the speed of the mechanism is exceeded, the curve will inevitably decline.

Unless you don't run to your limit.

I deliberately created data that showed there was still some capacity left.

Otherwise, if you exert all your strength, you will inevitably experience a decline after reaching your maximum speed.

After that, all that remained was to maintain the status quo.

It depends on how well you maintain it.

But it's also a curve that declines downwards.

As long as you exert your full strength, there is no need to adjust your speed and then accelerate again.

Unless you make a mistake.

However, this situation usually only occurs in amateur competitions. True professional athletes, as long as they run at full speed, will conform to this scientific curve.

After all, this curve was originally designed for people to determine under extreme conditions.

This curve wasn't created to make you go easy on me or to conceal your strength.

And now.

The speed has already begun to drop.

The real critical moment has arrived.

Su Shen knew.

Can we increase the speed again?
That is the key to whether the dual-peak speed can be successful.

In the extreme competition of the 100-meter sprint, the period when the speed drops in the later stages of the race is the key window for determining whether the athlete can maintain their advantage and accumulate strength for the final decisive stage.

Technical stability at this stage is a far better indicator of a top sprinter's true ability than instantaneous speed.

This is especially true for promising young athletes.

The most recognizable technical barrier for Su Shen at this stage is the delayed head-up rear camera technology that remained unchanged throughout the entire process. This almost demanding adherence to technology is by no means a simple matter of maintaining posture.

Instead, it chose to be deeply bound to the rigid transmission of the posterior chain fascia-muscle system and the continuous activation of the core stability system, so as to avoid technical deformation and maintain the pace of propulsion when the speed naturally decays.

This is the core support for accumulating strength for a second outbreak.

This is also the key to its ability to maintain the initiative in a highly competitive market.

Yes.

It is the posterior surface chain of the twelve fascial chains.

The essence of sprinting is the process by which the human musculoskeletal system efficiently converts bioenergy into propulsive kinetic energy, and the core carrier of this conversion is the human fascial chain system, among which the posterior superficial chain serves as the "main line of power transmission" for human movement.

Extending from the plantar fascia to the galea aponeurotica at the top of the head, and running through the posterior muscle groups and fascia of the whole body, it is the core chain that supports the human body to stand upright, completes the push-off and propulsion, and maintains the stability of the body's force line. It directly determines the transmission efficiency of ground reaction force and the controllability of body posture during sprinting.

For 100-meter runners, the decline in speed in the later stages of the race is not simply a decrease in speed, but an inevitable result of the depletion of ATP reserves in the body's fast-twitch muscle fibers, the lag of muscle glycogen breakdown rate behind energy consumption, and the gradual accumulation of muscle fatigue. At this time, the contraction force and contraction speed of muscle fibers decrease synchronously, and the explosive power of the lower limbs push off naturally declines.

In order to combat this decline, the body is prone to unconscious compensatory movements, the most fatal of which is the posture adjustment of raising the head and straightening the chest, an action that seems to be for maintaining balance...

In effect, it cuts off the rigid transmission of the back chain at its source.

It disrupted the body's biomechanical balance.

This ultimately led to a loss of rhythm and a break in the power line, allowing the opponent to seize the opportunity to narrow the gap.

The head-raising motion that most athletes exhibit during the slowdown phase is far more dangerous than simply shifting the center of gravity upwards. From the perspective of the posterior chain transmission mechanism, the head is the top terminal of the posterior chain.

Its posture directly determines the tension and transmission efficiency of the entire chain. When the athlete subconsciously raises their head, the head extends forward and upward in the sagittal direction, which first causes an abnormal change in the physiological curvature of the cervical spine. The cervical spine changes from a natural neutral position to excessive forward flexion, which in turn pulls on the galea aponeurotica and nuchal ligament around the occipital bone.

This causes the tension at the top of the watch chain to become instantly unbalanced.

This tension imbalance propagates down the posterior superficial chain, first affecting the neck muscles, causing passive tension in the upper trapezius and insufficient activation in the deep erector spinae muscles. It then propagates to the thoracic spine, where the thoracic spine, which normally maintains a moderate kyphosis, is forcibly straightened, resulting in an abnormally reduced thoracic kyphosis angle. This leads to relaxation of the back fascia, making it unable to form an effective rigid support surface.

Further down, the stress is transmitted to the lumbar spine and sacroiliac joint. The original physiological lordosis of the lumbar spine is forced to adjust due to the traction of the thoracic spine, the lumbar lordosis angle increases, and the stability of the sacroiliac joint decreases. At this point, the core transmission segment from the cervical spine to the lumbar spine in the posterior chain has been broken and cannot form a continuous rigid support.

These are the players of this era.

One of the core reasons why the Twin Peaks Speed ​​cannot be grasped at all.

Because the transmission of the posterior superficial chain is interrupted, it will directly affect the coordinated force exertion of the lower limb muscles and fascia. From the gluteal muscles to the posterior calf muscles, the tension transmission of the entire posterior superficial chain will be out of control.

As a core muscle group in the lower limbs of the posterior chain, the gluteus maximus should maintain efficient contraction during the push-off phase. However, due to insufficient stability of the lumbar spine and sacroiliac joint, activation is delayed, and contraction strength is greatly reduced.

The hamstrings on the back of the thigh are connected to the gluteal muscles through fascia. An imbalance in the tension of the posterior superficial chain prevents the hamstrings from working in synergy with the gluteus maximus, resulting in a disconnect in force exertion during extension.

Moving down to the back of the calf, the gastrocnemius, soleus, and plantar fascia form the end of the posterior superficial chain. Due to the tension imbalance at the upper end, the ground reaction force is lost when it is transmitted from the sole of the foot to the calf, and cannot be efficiently transmitted upward to the trunk. Instead, it generates excess lateral force, causing the body to sway slightly.

At the same time, the act of looking up will also cause the center of gravity to shift vertically upward.

Make the center of gravity projection point deviate from the optimal force-bearing area of ​​the supporting foot.

The force point, which should have been concentrated on the forefoot, shifts backward, increasing the force-bearing area of ​​the support phase.

The extended buffer time further reduces the efficiency of force generation during the push-off.

More importantly, the head-raising action triggers a chain of compensatory bodily responses, further exacerbating the disorder of the posterior epiphyseal chain.

Tilting the head upwards passively lifts the ribcage, compressing the chest cavity and shifting the breathing pattern from abdominal breathing required for sprinting to thoracic breathing. This significantly reduces the depth and frequency of abdominal breathing, decreases tidal volume, and reduces lung oxygen supply efficiency, failing to meet the oxygen demand of fatigued muscle groups. Consequently, lactic acid buildup in the muscles accelerates, further exacerbating fatigue in the lower limb muscles and creating a vicious cycle.

Furthermore, lifting the rib cage also pulls on the abdominal muscles. The transverse abdominis, as a key muscle group for core stability, should maintain high activation and isometric contraction throughout the sprint. However, it becomes relaxed due to the pull of the rib cage, causing the core stability system to fail. The trunk cannot form a stable power base, and the extension of the hip, knee, and ankle joints loses core support and cannot form coaxial power. The matching relationship between stride frequency and stride length is completely unbalanced.

The stride frequency drops sharply due to muscle fatigue and decreased power efficiency, while the stride length increases or decreases uncontrollably due to body imbalance. The support and extension of each step appear chaotic, and the originally smooth rhythm of progress is completely disrupted.

If the opponent seizes the opportunity to accelerate in the later stages, they can easily overtake the opponent and disrupt the opponent's rhythm.

At that time, even if one wanted to adjust, it was difficult to regain one's rhythm.

They could only watch helplessly as the gap widened.

This is also why almost all sprinters in the early stages tend to lose speed in the later stages.

The core reason for being overtaken.

In contrast, look at Su Shen now.

Technical performance during the speed decline phase.

Firstly, the ultimate execution of its delayed head-up technology is essentially achieved through stabilizing head posture.

Lock the tension at the top of the watchband.

Ensure that the entire rear watchband remains in a rigid conductive state at all times.

It provides stable mechanical support to the body when it is fatigued.

To fundamentally eliminate compensatory actions and maintain the continuity of the pace of progress.

The delayed head tilt technique is not simply about leaning your head back and chin touching your collarbone, but rather about precise biomechanical posture control, keeping your head in a neutral, rearward position throughout the entire process.

There is neither forward extension nor excessive backward retraction; the cervical spine maintains a natural neutral position, with the C1 to C7 vertebrae aligned neatly without any flexion, extension, or lateral tilt. This posture allows the galea aponeurotica and nuchal ligament around the occipital bone to maintain moderate and stable tension at all times.

It becomes the "fixed anchor point" at the top of the back chain.

Ensure the tension balance of the entire chain from the source.

The chin should be pressed against the front of the collarbone. This is not just a posture requirement, but rather a way to further stabilize the cervical spine posture by lowering the chin, preventing unnecessary tension in the neck muscles, and activating the deep stabilizing muscles in the neck to provide extra support for the cervical spine, ensuring that the head posture does not loosen at all due to physical fatigue.

Keep your line of sight level and lock onto the runway ahead.

There was no lifting or shifting.

This allows the eye and neck muscles to work together to create stability.

This further enhances the controllability of head posture, enabling precise control from the head to the neck.

This forms the first line of defense for the rigid transmission of the rear chain.

The stability of head posture directly determines the conduction efficiency of the upper and middle segments of the posterior epithelial chain and the neutral stability of the cervical spine.

This allows the neck muscles to be in an optimal activated state.

The middle and lower trapezius muscles continuously exert force, rather than the upper trapezius muscles being passively tensed, and the deep erector spinae muscles maintain high activation starting from the cervical spine.

This activation state is transmitted from top to bottom along the spine, maintaining the thoracic spine at the optimal kyphosis angle of 25° to 28°, and fully stretching the back fascia in the thoracic region.

This forms a flat and rigid support surface.

As the core carrier of the posterior superficial chain, the tension of the back fascia directly determines the rigidity of the trunk. When the back fascia is in a stable tension state, the connection between the thoracic and lumbar vertebrae is more stable, the lumbar vertebrae naturally maintain a physiological lordosis angle of 35° to 38°, and the sacroiliac joint is tightly fitted without any loosening.

At this point, a continuous and rigid spinal support chain is formed from the cervical spine to the lumbar spine and then to the sacroiliac joint. This support chain is the core center of the posterior surface chain transmission.

This ensures that the ground reaction force is transmitted upwards without any loss, and also provides a foundation for the stable activation of the core muscle groups.

The core muscles, as the "transfer station" for the transmission of the posterior chain, directly affect the transmission quality of the posterior chain through their activation state and stability. Su Shen's delayed head-up posterior placement technique stabilizes the spinal support chain, keeping the core muscles in a state of high activation and isometric contraction, thus forming a stable core support base.

During the speed decline phase.

While other athletes experience core relaxation due to loss of head posture, Suarez's transverse abdominis muscle maintains an activation level of over 70%. As a "natural belt" for the core muscle group, the continuous contraction of the transverse abdominis muscle tightly wraps around the abdominal and lumbar muscles, further stabilizing the lumbar spine and sacroiliac joint.

This makes the spinal support chain more rigid.

At this time, the multifidus muscle acts as a stabilizing muscle group deep within the spine.

Working in tandem with the erector spinae muscles, the spine maintains a neutral position, preventing forward and backward swaying or lateral tilting during push-off and takeoff. This core stability keeps the torso in a forward-leaning posture of about 5°.

This posture is the optimal posture for sprinting, ensuring forward momentum while keeping the tension of the posterior chain within a controllable range, providing stable support for the lower limbs to push off.

At this moment, it opens at lightning speed.

Consumption has increased dramatically.

Su Shen immediately mobilized the stability of his core and the rigid transmission of the upper and middle sections of the rear chain.

This lays a solid foundation for the coordinated exertion of the posterior epithelial chain in the lower limbs.

As the power output end for sprinting, the lower limbs rely entirely on the tension transmission of the posterior superficial chain and core support for the coordinated force exertion of their muscle groups and fascia.

After the speed begins to decline.

During the slowdown phase, Su Shen's every step of support and extension demonstrated the extreme precision of the transmission at the end of the rear chain.

The sole of the foot serves as the starting point for the back chain.

The support phase always begins with the outer side of the forefoot striking the ground first, quickly transitioning to full forefoot support.

This landing method can instantly tighten the plantar fascia. As the starting point of the posterior superficial chain, the tension of the plantar fascia directly determines the force efficiency of the calf muscles. When the plantar fascia is tightened, it will quickly pull the gastrocnemius and soleus muscles on the back of the calf, allowing these two muscle groups to enter a pre-activated state in advance.

Prepare for the push-off and power generation.

At the same time, the precise landing of the forefoot concentrates the ground reaction force in the optimal area, and the reaction force is quickly transmitted upward through the plantar fascia. It is then transmitted through the calf muscles to the hamstrings on the back of the thigh, and then to the gluteus maximus in the buttocks, forming a continuous power transmission along the posterior superficial chain without any interruption or loss.

During the push-off phase, Suarez's hip, knee, and ankle joints exert force simultaneously and extend in coordination. The core support for this movement is the tension transmission of the posterior chain and core stability.

The gluteus maximus, as a core power-generating muscle group in the lower limb segment of the posterior superficial chain, contracts efficiently during push-off, and its contraction force is closely connected to the hamstrings through the gluteal fascia.

The hamstrings contract synchronously, working in synergy with the gluteus maximus to efficiently transfer the contraction force of the hips to the knee joint.

The knee joint extends rapidly under the pull of the gluteus maximus and hamstring muscles, while the gastrocnemius and soleus muscles on the back of the calf contract fully, driving the ankle joint to plantarflex, completing the push-off force and propelling the body forward.

Throughout this process, the tension of the posterior chain remains stable. From the plantar fascia to the gluteus maximus and then to the back fascia, the entire chain acts like a taut steel cable, efficiently integrating the force generated by the lower limb extension with the ground reaction force.

It is transmitted upwards to the torso and then transformed into the forward propulsion force of the body. Even if the lower limb muscles are fatigued and the extension force is reduced, it can still be transmitted rigidly through the posterior chain.

Minimize energy loss.

Ensure that the pace of progress is not disrupted.

During the landing cushioning phase, the rear chain also plays a crucial role in shock absorption and stability, preventing the body from losing balance due to the impact of landing and preparing for the next push-off.

When Suarez's feet land, the anterior calf muscles and gluteus medius work together to exert eccentric force to absorb the impact upon landing. The stability of this movement is inseparable from the tension support of the posterior chain.

The gluteus medius, a deep muscle group in the buttocks, is connected to the gluteus maximus through a fascia. The stabilizing tension of the posterior superficial chain keeps the gluteus medius highly activated, allowing for efficient eccentric contraction upon landing and preventing the body from tilting to the left or right.

The eccentric force exerted by the anterior calf muscles forms an antagonistic balance with the posterior calf muscles, which not only acts as a shock absorber but also quickly tightens the posterior calf muscles, preparing them for the next push-off and storing elastic potential energy.

This connection between landing cushioning and pre-stretching relies entirely on the tension control of the rear chain, ensuring that every step lands solidly and stably without any unnecessary swaying. This ensures that the matching relationship between stride frequency and stride length is always within a controllable range. Even when the speed is declining, the fluctuation range of stride frequency is minimal, the stride length is stable and precise, and the pace of progress remains smooth without any panic.

This is because the entire rear chain is rigidly conductive.

This not only ensures efficient power transfer and body stability, but also allows Su Shen to store elastic potential energy in his muscle fibers during the speed drop phase.

To build up strength for a second burst of energy later in the season.

This is also the core value of the synergistic effect between delayed head-up technology and the back-chain.

During sprinting, the elastic potential energy of muscle fibers is an important source of explosive power. When muscle groups are stretched appropriately, they will store a certain amount of elastic potential energy.

Release during contraction to enhance the power output.

Su Shen uses delayed head-up and rear-positioning techniques to lock the tension in the posterior chain, allowing the muscle groups in various parts of the body to maintain a moderate pre-stretch state throughout the exercise, including the muscle fibers and fascia of key parts of the posterior chain such as the back fascia, gluteal fascia, hamstrings, and calf muscles.

In every stage of support, extension, and cushioning, the optimal pre-stretch range of 110% to 115% of the resting length is maintained.

This pre-stretched state will not cause muscle fatigue due to overstretching.

It can also store elastic potential energy to the maximum extent.

The speed began to decline.

At this point, the crucial ten meters arrived.

If this isn't done correctly, the entire technique will fail.

It wasn't done well.

It's like admitting defeat in advance.

There is no possibility of a counterattack.

So everything before that was the normal process.

The speed drops and then reverses.

This……

That's the key to this game!
This is also what Su Shen needs most!

Otherwise, he would have to face Bolt, who had opened the fourth gate to extreme speed, in a head-to-head battle.

A dead end.

Su Shen did not blindly pursue an increase in instantaneous speed.

Instead, it relies on the stable transmission of the rear chain and the precise execution of technology to make each step an accumulation of elastic potential energy.

When the body is in a state of forward-leaning torso and taut posterior chain, with each push-off, the muscle groups release elastic potential energy and complete a new pre-stretch through landing cushioning, forming a "stretch-contraction" cycle.

Even if the fast-twitch muscle fibers in the lower limbs become fatigued, the conversion and accumulation of elastic potential energy can compensate for some of the lack of explosive power and maintain a stable propulsion rhythm.

The rigid transmission of the posterior chain keeps the synergistic activation of muscles at a high level, with minimal difference in the timing of force exertion between muscle groups. This avoids energy waste caused by disjointed force exertion, allowing every bit of energy to be precisely converted into propulsive force or stored as elastic potential energy, thus reserving sufficient power for a second burst of power in the final decisive stage.

This tactical approach of "building momentum through stability" is based on the delayed head-up technique and efficient transmission of energy through the rear chain, and it also reflects Suarez's ultimate understanding and control of sprinting techniques.

During this critical window of reduced speed, the competition has reached a fever pitch.

The opponents behind them had already used the fatigue resistance of slow-twitch muscle fibers to accelerate twice in the second half of the race.

Speed ​​into the lightning.

There were faint sounds of something cutting through the air.

Bang bang bang bang bang.

Bang bang bang bang bang.

However, some athletes managed to overtake others by adjusting their stride length or stride frequency.

Competition on the track is becoming increasingly fierce, and the difference in every step can determine the final outcome.

At this moment, external interference, the opponent's rhythm, and one's own fatigue...

Both of these challenges place extremely high demands on the players' technical composure and mental state, and what Su Shen demonstrated was the unique technical perseverance and tactical composure of a top player.

This is the core support for this composure.

It still uses delayed head-up technology and stable transmission via the rear watch chain.

Bang bang bang bang bang.

Unaffected by the acceleration and overtaking of his competitors, he remained steadfast in his own technical framework, his red figure standing out resolutely on the track.

This determination is not simply due to mental strength, but stems from the extreme stability of his physical technique and the uninterrupted rigid transmission of the rear chain, giving him absolute control over his own rhythm.

65 m.

With each step, the forefoot lands precisely, instantly pulling up the tension at the starting point of the rear chain.

With each push-off, the hip, knee, and ankle joints exert force in a coaxial manner, and the power is efficiently transmitted through the posterior chain.

Each step of the cushioning process involves coordinated eccentric shock absorption by muscle groups, and stable regulation of tension in the posterior chain.

From head to toe, from cervical spine to sacroiliac joint, from back fascia to plantar fascia, the entire rear watch chain is like a precisely operating transmission belt.

By integrating the strength of every part of the body, even as the speed naturally decreases, the body's propulsion rhythm remains stable, and the standardization of the movements remains extremely high.

There was no panic whatsoever, and no technical distortion whatsoever.

Every step was firm and powerful, and every exertion of force was precise and efficient.

This extreme technical stability allows Su Shen to maintain a clear tactical mindset even when fatigued.

He knew that the decline in speed was an inevitable phase, and that blindly accelerating would only disrupt his rhythm, consume more energy, and cause him to miss the opportunity to unleash his full potential in the later stages.

He relies on the stable support of the rear chain to consume the least amount of energy and accumulate the most elastic potential energy with stable technical movements, waiting for the best opportunity for a second burst.

At this moment, every muscle group in his body is contracting and relaxing according to the optimal biomechanical trajectory. The muscles at the back of his neck stably support his head, and the muscles in his back tighten the fascia to form a rigid torso.

The core muscles continuously contract to stabilize the base, while the glutes and lower limb muscles work together to propel the body. Every link in the posterior chain is precisely connected and efficiently transmitted.

There are no unnecessary movements, no wasted energy—this is the ultimate level of technical execution.

It is something that ordinary players can hardly achieve.

This is also why Suarez is now a benchmark for Asian sprinting.

This is the core reason why they can even directly challenge Bolt.

From a biomechanical perspective

Su Shen's delayed head-up rear-mounted technology perfectly complements the transmission mechanism of the rear watch chain.

The head stabilizes and locks the tension at the top of the rear watch chain, the trunk stabilizes and solidifies the core support of the rear watch chain, and the coordinated force exerted by the lower limbs activates the power at the end of the rear watch chain.

These three elements form an organic whole, constituting his technological moat during the period of declining speed.

This technical system not only conforms to the physiological structure and movement patterns of the human fascial chain, but also meets the biomechanical requirements of sprinting, representing a perfect fusion of technology and human function.

This reflects the core development trend of modern sprinting: "refined technique, efficient power generation, and stable posture."

Compared to other athletes who lose speed and control in the later stages due to technical errors, Su Shen's advantage lies in...

He internalized the delayed head-up technique into an instinctive bodily response, maximizing the transmission efficiency of the posterior strut.

Even in extreme states of physical fatigue and decreased speed, one can maintain the precision of movement and the stability of rhythm by relying on technical inertia and the rigid support of the fascial chain.

This ability is honed through meticulous training day after day, a pursuit of perfection in every technical detail, from adjusting head posture to activating neck muscles, and then to core stability and lower limb power generation.

Every step has been honed through countless trials, ultimately forming muscle memory and technical instinct.

Put them in a high-pressure environment on the field.

Even when facing Bolt's Super 4 power.

There is still a glimmer of hope.

67 m.

Bang bang bang bang bang.

The phase of speed decline is coming to an end.

As the final decisive stage approaches.

Su Shen uses delayed head-up technique and the stable transmission of elastic potential energy and physical strength through the rear chain.

Everything is ready.

At this moment, his head remains neutral and positioned at the back.

With the chin pressed firmly against the collarbone and the gaze fixed ahead, the watch chain remains taut like a steel cable, and the core remains as stable as a rock.

The elastic potential energy of the lower limb muscles has reached its peak, and it is just waiting for an opportunity to be released instantly.

The second outbreak was completed.

Those athletes who lost control of their rhythm and caused their rear chain to become disordered due to head-up movements in the later stages were no longer able to launch an effective attack.

All we could do was watch as Su Shen's red figure grew increasingly swift on the track.

But this...

not enough.

Because too much was consumed earlier.

Light is a backlist.

No.

Ignition successful!

68 m.

At this point, it's not a matter of energy metabolism or fatigue accumulation.

Or the efficiency of elastic potential energy recovery drops sharply.

It's still about neural control and temporal disorder.

This all began to cause a loss of coordination and balance in movement.

After the Su God mobilized the post-epithelial chain, metabolic adaptation and efficiency began to recover.

But it's not enough.

Resynchronization of elastic systems.

But it's not enough.

Recalibration of neural control.

But it's not enough.

Stable reconstruction of action patterns.

But it's not enough.

Of course not.

Su Shen knew it wasn't that simple.

otherwise.

How could history have reached 2015?

There hasn't been a bimodal high-speed model yet.

It is certainly difficult for him.

These ones.

Everything was as expected.

One is certainly not enough.

It's still not stable enough.

The body's instability prevents the replenishment of energy lost at a rate that cannot be achieved.

Then.

Let's add one more.

Add the previous list chain.

after all.

It's not just a simple transfer.

Instead.

Combine them.

This creates a double-chain pull.

This creates a new closed loop for the entire energy system.

Yes or no.

And that's how it's formed.

come on.

Yussane.

This time it's not Moscow.

The gap between you and the top performers in terms of speed is naturally huge.

Then.

One high-speed run isn't enough.

I'll only come twice.

twice.

Is that enough?
……

why?
Why the speed of the pursuit?

Not fast enough?
Bolt was somewhat puzzled. He had already activated the fourth stage of his six-second burst, and now he was facing up-and-coming competitors. Shouldn't he be able to easily defeat them?

???

Why……

Why can't we quickly defeat the opponent here?

No reason.

Just like Bolt's fourth stage of his six-second burst.

Miracle.

born.