The Su God of the Reopening of the Sports Arena

Chapter 2443 Super Liberation! Two Years of Technological Upgrades Begin to Emerge

Chapter 2443 Super Liberation! Two Years of Technical Upgrades Begin to Emerge

Besides Suarez's outstanding achievements.

It shocked the world.

Actually, looking at it this way...

The other people's grades weren't bad either.

Especially Zhao Haohuan.

Old Zhao bent his arm and spread it out.

The "On your positions" command was given.

When Zhao Haohuan bent over and placed his hands on the ground, he deliberately widened the distance between his hands to 1.2 times his shoulder width. This adjustment was due to his height.

His height of just over 1.9 meters naturally results in a high center of gravity, and a narrow hand spacing would make him less stable when leaning forward. Through testing with a 3D motion capture system, a wider hand spacing reduced his torso's forward lean angle from the traditional 45° to 38°.

The load on the core muscles is reduced by 18%, while ensuring an open field of vision and avoiding obstructed vision due to excessive forward tilting.

His front and rear push-off distance is 15 centimeters longer than that of ordinary athletes, a result of precise calculations based on leg length proportions. The height difference between the front and rear push-offs is controlled at 5 centimeters, with the rear push-off slightly higher, maintaining the ankle dorsiflexion angle at 12°. This angle allows the gastrocnemius and soleus muscles on the back of the calf to reach their optimal pretension value.

Test data shows that the muscle's energy reserves are increased by 2% at this angle compared to the previous posture, laying the foundation for the explosive release of power at the moment of pushing off the ground.

Don't underestimate this small amount; for tall people, for athletes who have already broken the 9.70-second barrier, it's significant.

Any breakthrough.

These are all pieces of the puzzle that must be grasped.

To achieve excellence and reach new heights, more than just simple operations are required.

We need to do better in every aspect.

As soon as the "Ready" command was given, Zhao Haohuan raised his hips, and his core muscles instantly entered a "rigid lock" state.

The rectus abdominis and erector spinae muscles contract synchronously, and the peak electromyographic signal reaches 240μV, forming a "rigid pillar" that runs through the trunk. This is one of the core breakthroughs of his technical improvement.

In the past, his high center of gravity caused his torso to sway from side to side when starting. Through "core-hip coordination training", he reduced the amplitude of torso sway from 2.5° to 0.8°.

The force transmission loss rate decreased from 22% to 9%.

The moment Zhao Haohuan bends over, the first thing he adjusts is the angle of his hip joint. He doesn't use the low center of gravity posture of a traditional sprinter's "squat," but instead controls the hip flexion angle at around 60°.

This angle is the "critical point of balance" that he found through countless training sessions.

A height of just over 1.9 meters naturally leads to a higher center of gravity, and a squatting posture that is too deep will cause excessive tension in the muscles around the hips, which will actually affect the speed of exertion.

A 60° flexion angle allows the gluteus maximus and quadriceps to maintain adequate pretension while preventing the upper body from becoming unbalanced due to excessive forward leaning.

As for the distance between his feet, it was 3 centimeters wider than his shoulders.

This is the "power generation space" reserved for the hip thrust movement.

A wider stance allows the hip joint to rotate more during push-off, while also increasing the foot's contact area with the ground by 8%, thus improving grip.

When adjusting his stance, his left foot was completely flat on the push-off board, while his right toes were slightly turned outward by 5 degrees. This subtle angle adjustment was to ensure that the force line during the push-off was transmitted more smoothly to the hip joint, avoiding force loss due to the misalignment of the toes.

In the past, his improper toe angle caused some of the power to be dispersed when he pushed his hips forward. Now, this correction has improved the efficiency of his initial power generation.

bang——

The gunshot broke the silence, and Zhao Haohuan bent his arm and started running.

When the right foot pushes off the ground, instead of relying on the ankle for power as before, the hip joint is used as the axis to swing the thigh forward.

At the moment of pushing off the ground, the gluteus maximus contracts rapidly, releasing the previously stored elastic potential energy and propelling the hip joint forward. At the same time, the quadriceps muscles work together to extend the lower leg forward and upward. This is a "hip-dominant" push-off pattern.

The force line is transmitted directly from the sole of the foot to the hip joint, and then converted into forward propulsion through the hip thrust.

This avoids the loss of force at the knee joint.

Compared to three years ago, his starting force transmission efficiency has improved significantly.

This is in contrast to Moscow.

boom.

With the first step of the start, his hip joint completed the first small hip thrust.

The high-speed camera captured that when his thigh swung forward, his hip joint naturally externally rotated 3°. This tiny rotation increased his stride by 5 centimeters compared to a traditional start, while also making the angle of his foot contact with the ground more closely, reducing braking resistance.

In the past, Randy always felt that his starting stride was not good enough. Now, with the help of this hip-send starting technique, his first stride is very long, laying the foundation for the subsequent acceleration phase.

Acceleration phase.

Su Shen had already flown away smoothly.

But he had already gotten used to it, and now all he had to do was focus on his own work.

Su Shen has things to do.

Of course, he also has things to do.

The 10-meter mark is complete.

Start accelerating.

The acceleration phase is a crucial transition zone in the sprint technique chain, from "start to top speed". The core challenge lies in how to achieve the dual goals of "step-by-step speed increase" and "pre-activation of mid-run power generation mode" through precise control of hip delivery technique during the dynamic forward shift of the body's center of gravity.

Zhao Haohuan's current technical breakthrough is essentially about moving the hip thrust from a passive, follow-the-ground action to a secondary movement.

The core engine has been upgraded to "actively guided power chain reconfiguration" and optimized through a 10-20 meter hip delivery strategy.

This lays the foundation for a rapid breakthrough of 20-30 meters and efficient output during the subsequent mid-race run.

10-20 meters:
The hip-thrust "power-guided" function and rapid start-up.

At 10 meters, the body posture transitions from "starting forward lean" to "accelerating forward lean". At this point, Zhao Haohuan's hip thrust technique's primary task is to complete "force line correction" and "muscle group activation" to provide guidance for rapid start.

Previously, this stage relied heavily on ankle extension to increase stride frequency, resulting in the force line being concentrated in the lower limbs, leading to the problem of "powerful push-off but inefficient propulsion." Now, Zhao Haohuan has achieved this through "hip-driven force line reconstruction"...

This achieves a fundamental optimization of power transmission.

It may seem like a simple "motor-driven" approach, but in fact it's setting the stage for what's to come—

The force line guiding mechanism for hip delivery.

This laid the groundwork.

10-15 meters.

Zhao Haohuan gradually increased the hip extension range from 12° at the start to 18°.

This process is not simply about "lifting the thigh," but rather about using the active forward thrust and external rotation of the hip joint to reduce the vertical force during the push-off phase from 45% to 38% and increase the horizontal force from 55% to 62%.

This adjustment of force line originates from the "coordinated linkage of the hip joint and knee joint" during hip extension:
When the hip joint is pushed forward, the direction of contraction of the quadriceps muscle changes from "vertically upward" to "obliquely forward and upward".

This causes the knee joint to extend towards the body's longitudinal axis.

This avoids the lateral energy loss caused by the deviation of the force line when pushing off the ground, which was previously a problem.

High-speed motion capture data shows that at the moment his foot touches the ground, the angle between the line connecting his ankle and hip joints and the ground changes from 58° at the start to 63°. This angle change increases the effective propulsive component of the push-off reaction force by 9%. The core driving force behind this adjustment is the active guidance of the hip thrust movement on the trajectory of the lower limb joints.

The forward thrusting motion of the hip joint acts like an "invisible traction bar," unifying and focusing the force of each joint in the lower limbs towards "forward propulsion," completely changing the inefficient state of "force being dispersed among the joints" during the acceleration phase that Zhao Haohuan had previously experienced.

This is the benefit of the force line guidance mechanism of hip delivery.

We have said goodbye to the chaos and instability of the past.

Now it's like having a clear command.

Combat effectiveness is more concentrated and cohesive.

15-20 meters.

Zhao Haohuan further increased his hip extension to 20°. The core goal at this point was to activate the synergistic force exertion pattern of the gluteus maximus and hamstrings, thus reserving muscle group function for the "super hip extension" during the subsequent mid-race.

Zhao Haohuan previously relied primarily on his quadriceps during this phase, causing the muscle group to become fatigued prematurely.

Now, Zhao Haohuan is adjusting the "muscle activation sequence" through hip thrusting movements.

It enables the early switching of the dominant muscle for force exertion.

Electromyography (EMG) tests showed that, starting at 15 meters, his gluteus maximus EMG signal increased from 160 μV to 200 μV, his hamstring EMG signal increased from 140 μV to 180 μV, while his quadriceps EMG signal remained around 210 μV.

This change stems from the "hip extension preloading" during hip extension: when the thigh swings forward to its highest position, the slight extension of the hip joint puts the gluteus maximus in a "micro-stretch-rapid contraction" state, while the hamstrings complete pre-tension with the help of the slight flexion of the knee joint.

Both were already in a "ready-to-go" state before pushing off the ground.

The contraction efficiency during push-off will naturally be better.

The remaining value of this pre-activation effect lies in—

Engage the gluteus maximus and hamstrings, which have stronger fatigue resistance, in advance.

Reduce the early load on the quadriceps.

This lays the foundation for muscle group function during the sustained acceleration phase after 20 meters and the high-intensity output during the middle run.

Bang bang bang bang bang.

After 20 meters, the body enters the "rapid construction period". At this time, the core task of hip delivery technology is to achieve "synergistic gain of stride frequency and stride length", and at the same time activate the "super hip delivery" power mode of running in advance.

To avoid the "speed gap" during the transition from the acceleration phase to the mid-race phase.

Zhao Haohuan's technical breakthrough at this stage lies in breaking the perception that "step frequency and stride length are mutually exclusive" by achieving "dynamic balance control" through hip extension.

This achieved simultaneous improvement in both areas.

Between 20 and 25 meters, Zhao Haohuan's hip extension angle stabilized at 20°, and his stride frequency also increased somewhat.

The key to this breakthrough lies in the "hip joint rotation cushioning" technique during hip extension:
When the thigh swings forward to its peak, the hip joint internally rotates by 0.5°, and then quickly externally rotates by 1.5° when pushing off the ground. This tiny rotational motion is like the meshing of a high-speed gear.

It provides additional rotational torque for the front swing of the thigh, increasing stride frequency, and also expands the effective propulsion distance of the stride through external rotation.

Compared to the previous acceleration mode, his stride frequency increase (4.7%) and stride length increase (4.8%) were basically the same in this stage, whereas previously when the stride frequency increased by 3% in this stage, the stride length only increased by 1.5%.

The essence of this synergistic gain lies in the precise control of the "lower limb kinetic chain" by the hip thrust movement.

It utilizes the rotational movement of the hip joint to coordinate the swinging rhythm of the thigh and calf.

This reduces the time it takes for the foot to touch the ground from 0.11 seconds during the initial phase to 0.095 seconds.

While increasing stride frequency, stride length is simultaneously expanded due to the effective propulsion of hip extension, completely solving the technical dilemma of "at the expense of one thing" in the traditional acceleration phase.

Randy looked at Zhao Haohuan.

Although most eyes were on Su Shen, a quick glance at Zhao Haohuan behind him still...

Very pleased.

To reiterate, it's mainly because Su Shen's personal abilities are too strong, his mental abilities are too strong, and his ability to plan for himself is too strong. This makes the coach's relationship with Su Shen seem like more than just that of a mentor and friend...

It's more like a state of complete learning and being guided.

Even when he was researching topics or undertaking tasks with Su Shen, his role was primarily supportive.

To put it bluntly, for a super coach like Randy, it just feels a bit...

A little disappointed.

I don't feel that much of a sense of accomplishment.

It's not that he didn't want to cooperate with Su Shen; after all, he learned a lot from working with Su Shen, which greatly broadened his horizons.

The main reason is that the satisfaction of one's own value comes from Su Shen...

The amount gained was a bit too little.

And this.

Zhao Haohuan.

I find so much satisfaction in him.

Zhao Haohuan is more like one of the ultimate athletes that Randy could train with all his knowledge.

They have a greater sense of participation and planning.

That brings a greater sense of accomplishment.

If it were Su Shen, after he proposed some plans, people might not be so satisfied, and more likely they would just give him a better template instead.

Of course, after seeing those templates, he was truly convinced.

They just do it better.

Randy isn't petty about this.

Otherwise, I wouldn't have been able to work with Su Shen for so long.

However, if we compare it to Zhao Haohuan.

Because his knowledge in this area is far inferior to Su Shen's, he has more opinions on the coaching team and will carry them out diligently.

The execution level will be higher.

It brings greater personal satisfaction to coaches.

Humans are just that kind of animal.

This is unlikely to change for at least the next few centuries.

At 25-30 meters, the hip extension range increases to 25°. At this point, Zhao Haohuan has begun to practice the "three-muscle linkage" hip extension power generation mode during the run.

Gluteus maximus 40%, quadriceps femoris 35%, hamstrings 25%.

This achieved an "advanced transition" from the acceleration phase to the mid-race phase. In contrast, in Moscow, Zhao Haohuan often experienced a 0.02-0.03 second speed stagnation during this transition due to the shift in power mode.

It's mainly because he's too tall.

He's not Usain Bolt.

Almost all athletes who reach this height will experience this physiological problem.

That's why people say Bolt is such a supermodel.

Because these problems that occur in tall athletes are also present in Bolt...

It has almost never appeared.

outrageous.

Zhao Haohuan activated the hip-sending mode in advance.

This "transition fault" has been completely eliminated.

The strategy model that Randy set for him before the start of winter training.

This provides a real-world demonstration.

Biomechanical analysis shows that, starting at 25 meters, his hip extension already possesses the core characteristics of "super hip extension" during the middle of the race.

The ratio of hip thrust amplitude to thigh swing height increased from 0.8 in the initiation phase to 1.2.

This means that the "effective propulsion distance" of the hip thrust movement has increased significantly.

At the same time, the pelvic tilt angle is stabilized at 3° during hip extension, ensuring a rigid connection between the upper body and lower limbs and avoiding trunk swaying caused by excessive hip extension.

This pre-activation makes him 0.2 m/s faster at 30 meters than when using the traditional acceleration mode.

Furthermore, the speed curve exhibits a "smooth climb" characteristic.

There are no stalled nodes.

There are fewer stagnant nodes.

The speed and consistency are naturally higher.

Overall, the logic that Randy built for Zhao Haohuan, in the acceleration phase, is to build a "power reserve pool" for top speed and mid-range running.

Why do you say that?
This is because Zhao Haohuan's hip delivery strategy in the 10-20 meter acceleration phase is essentially based on two major goals: "rapid construction" and "pre-running in the middle of the race," and has built a three-dimensional technical system of "force line optimization - muscle group activation - mode transition."

The 10-20 meter hip thrust line guidance solves the problem of "force dispersion and inefficiency" in the traditional acceleration phase, providing directional assurance for rapid start-up.

The 20-30 meter hip extension coordination control achieves a synchronous increase in stride frequency and stride length, while activating the core power generation mode in advance during the middle run, avoiding "transition gaps".

From a technical perspective, hip delivery at this stage is no longer a simple "action execution," but rather an "active reconstruction of the kinetic chain."

It integrates the functions of various joints and muscle groups in the lower limbs into a unified "propulsion system" by taking the lead in the hip joint. This not only lays the speed foundation for the ultimate breakthrough after 30 meters, but also ensures that the "super hip delivery" can quickly enter a highly efficient output state during the middle running phase through muscle pre-activation and mode pre-positioning.

This technical design, which "paves the way for the subsequent stages," is the core of Zhao Haohuan's hip delivery technique during the acceleration phase, which surpasses the traditional model. It is also the fundamental guarantee that he can maintain high speed during the subsequent running and sprinting phases.

Bang bang bang bang bang.

Running along the way.

The 30-50 meter range is a critical interval in sprinting, transitioning from "acceleration build-up" to "maximum steady state." The core task is to convert the speed accumulated during the acceleration phase into sustainable maximum speed output, while simultaneously upgrading the hip delivery technique from "cooperative drive" to "absolute dominance."

Zhao Haohuan's technical breakthrough at this stage lies in the "three-dimensional control" of the hip extension movement, including amplitude, rhythm, and force exertion mode, which has created a "low-loss, high-stability, and sustainable" high-speed running system, laying the foundation for continuous and efficient output in the middle stage of the race after 50 meters and for fatigue resistance in the later stages.

Hip delivery-led high-speed maintenance and kinetic chain deepening.

This is the new challenge Randy gave him: weight running.

Then it's about implementing it step by step.

At 30 meters, Zhao Haohuan's speed has reached a good level, entering the "extreme speed construction period". At this time, the primary goal of the hip extension technique is to avoid speed loss due to movement fluctuations by accurately locking the amplitude, while strengthening the rigid connection between the core and the hip to build a stable extreme speed running posture.

Compared to the problems he often encountered at this stage, such as "excessive hip extension leading to movement distortion" or "insufficient extension leading to speed stagnation," Zhao Haohuan has now achieved stable output during acceleration and mid-run transitions through the "dynamic locking of hip extension amplitude" technology.

30-35米，赵昊焕的送髋幅度从加速阶段末的25°提升至28°，并在此后5米内稳定维持这一幅度。这一幅度是他基于自身身体结构与动力链效率测算的“最优阈值”。

Below 28°, the stride length is insufficient, making it impossible to fully utilize the height advantage.

If the angle is higher than 30°, an additional 15% of core strength is required to maintain balance, and it is easy to cause the hip joint to push forward excessively, which will disrupt the stability of the upper body's forward-leaning posture.

The core technology for achieving this precise targeting is "graded contraction of the hip muscles":
The gluteus maximus provides extension power with 42% of its force to ensure that the hip extension reaches the threshold.

The quadriceps muscle uses 33% of its strength to control the speed of the thigh swing forward, avoiding excessive amplitude.

The hamstrings provide "end-of-stretch cushioning" with 25% of their force. When the thigh swings forward to 28°, the hamstrings contract rapidly for 0.003 seconds, precisely controlling the swing endpoint like a "mechanical limiter".

Electromyography showed that the contraction timing error of these three muscle groups was less than 0.002 seconds, ensuring a high degree of stability in hip extension amplitude.

This utilizes a "threshold control" mechanism based on the hip extension amplitude.

To complete the initial construction of rapidly improving performance.

35-40 meters, as the speed continues to increase.

The impact of air resistance and ground reaction force is significantly enhanced, and at this time, the stable output of the hip delivery technique is highly dependent on the rigid connection between the core and the hip.

During this stage, Zhao Haohuan controlled the relative displacement of the torso and pelvis within 0.3° through "isometric contraction of the core muscle groups," which is far lower than the 1.2° of traditional athletes, thus constructing a "rigid body" power transmission structure.

The specific technical approach is as follows:

The rectus abdominis and erector spinae muscles maintain continuous isometric contraction, and the electromyographic signal stabilizes at 220μV, forming a "rigid pillar" that runs through the trunk.

The external oblique muscles and latissimus dorsi muscles work together to fix the pelvis within a range of "horizontal position ±0.5°", preventing the pelvis from tilting to the left or right or rotating forward or backward when the hip is extended.

The direct effect of this rigid reinforcement is that the force transmission loss rate during hip extension is reduced from 8% in the acceleration phase to 5%, and the effective propulsion force per step is increased by 4%.

This ensures that the speed, which is already at a high level of around 10 m/s, can still maintain a stable, slight increase of 0.1 m/s.

Hip rigidity enhancement.

It played a significant role here.

Zhao Haohuan previously had hip dysplasia.

I worked with Su Shen for 10 years.

From his teens to his current peak performance.

Inadvertently.

Weaknesses have been completely transformed into strengths.

It has become a completely advantageous project for them.

Even because he is one of the few people in the world, besides Suarez, who has developed this field most scientifically and best, even without Bolt's super talent, he can learn it without a teacher.

However, it allows them to retain sufficient capital for technological development within their own bodies.

This is why Randy praised Zhao Haohuan's performance in training.

Many of the difficulties he had anticipated.

In fact, it did not occur.

at this point.

Perhaps even Randy himself.

Neither thought.

In fact, the reason why Zhao Haohuan was able to do so smoothly was that Su Shen had laid a very good foundation for him.

It was so good that he and Randy had almost forgotten about it.

His initial setbacks and decline were precisely due to insufficient hip strength.

It lacks functionality.

The level of development is not high.

What now?
All of these have now become Zhao Haohuan's advantages.

These 10 years of quiet cultivation.

During this technological upgrade process.

Finally, their hard work paid off.

It unleashed a power that had never been imagined before.

The 40-meter mark is a crucial juncture in sprinting, transitioning from "accelerated accumulation" to "explosive bursts of speed." This stage is not a period of speed stabilization, but rather a "power-accumulating window" for storing energy and activating muscle groups for the explosive bursts of speed after 50 meters.

The core value of Zhao Haohuan's hip delivery technique at this stage lies in gradually mobilizing the body's power potential to its peak state through the "dynamic power storage" strategy, while simultaneously activating the "explosive power generation mode" in advance.

Ensure that it can instantly enter the high-speed output state after 50 meters.

This is called the "power-accumulating boost" and pre-activation of the hip thrust.

At 40-45 meters, Zhao Haohuan's hip thrusting motion shifts from "actively generating hip thrust" to "elastically storing hip swing," the core of which is to accumulate elastic potential energy through the "stretch-contraction cycle" of the muscles around the hip joint.

Previously, I often continued the "hard-force" mode during the acceleration phase at this stage, prematurely depleting the energy of my deep muscles, which led to exhaustion after 50 meters.

It has not yet reached the optimal stage of the model.

Energy was wasted.

Now? Zhao Haohuan, through "fine-tuning the force intensity" when thrusting the hip, allows the muscle groups to complete energy storage in a dynamic manner.

Specifically, when the thigh swings forward to a high position, he no longer consciously contracts his quadriceps to exert force, but instead uses the natural forward swing of the hip joint to keep the hamstrings and gluteus maximus in a "slightly stretched" state.

This stretching is not passive relaxation, but rather like "slowly drawing a bowstring," allowing muscle fibers to lengthen within a controllable range and silently store elastic potential energy.

The moment the foot touches the ground, these stretched muscle groups contract rapidly, converting the stored potential energy into propulsion. At the same time, the slight flexion of the knee joint cushions the impact, preventing energy from being wasted upon contact with the ground.

The key to this "elastic power storage" lies in the "balance between exertion and relaxation".

When extending the hip, neither tense it up to the fullest extent, causing premature muscle fatigue, nor completely relax it and lose power connection. Instead, let the hip joint act as an "elastic hub," completing the "collection-storage-initial release" of energy during the swing.

This builds confidence for an even more powerful burst of energy after 50 meters.

45-50 meters.

The focus of hip extension techniques has shifted to "deep muscle activation," with the goal of getting the core muscles that will be used for explosive power 50 meters into a "ready state" in advance.

Explosive speed in sprinting relies on the coordinated effort of the gluteus maximus, hamstrings, and deep core muscles.

If these muscle groups are not fully activated before the burst of power, "delayed power generation" is likely to occur, causing the best opportunity for explosive power to be missed.

He'd been like that before.

I can never seem to match it.

They only faced each other a few times, and that was just...

Luck plays a part.

And now.

Randy and what he did was...

We need to seize this opportunity.

Remove the word "luck".

During this phase, Zhao Haohuan activated his muscles by shifting the point of force when delivering his hip.

The hip thrust, which was originally dominated by the quadriceps, gradually shifts the center of force to the gluteus maximus and hamstrings. When the hip joint pushes forward, he will subconsciously contract the posterior fibers of the gluteus maximus, which will lead the hip joint to complete a slight backward extension and pre-swing.

This seemingly insignificant movement can quickly activate the deep fibers of the gluteus maximus, switching it from a "basic involvement" state to a "ready to explode" state.

Simultaneously.

The hamstrings complete a "rapid contraction-relaxation" cycle by swinging the thigh backward, much like oiling machine parts, which improves muscle reaction speed.

This "muscle awakening" is not achieved through high-intensity exertion, but through the "precise targeting" of the hip thrust.

Each hip thrust angle and force has been refined repeatedly to ensure that the movement can accurately stimulate the key fibers of the target muscle group, allowing them to adapt to the explosive power rhythm in advance without consuming too much energy.

Just like an athlete's "warm-up punch" before a competition.

It's not for hitting the target.

Instead, it allows the arm muscles to find the feeling of exertion in advance.

Because the explosive speed after 50 meters requires not only powerful motors, but also a high stride frequency to match. If the stride frequency is out of sync with the rhythm of exertion, even the strongest motor cannot be converted into effective speed.

During the hip extension process of 40-50 meters, Zhao Haohuan has already begun to "rehearse" the stride frequency rhythm during the explosive phase. By subtly increasing the frequency of hip extension, he allows his body to adapt to the high-speed swinging state in advance.

Before 40 meters, his hip extension frequency and stride frequency maintained a steady increase, while after 40 meters, he would subtly increase the swing speed of his hip joint while maintaining a stable hip extension amplitude.

It's not about deliberately "keeping up with the pace," but rather about shortening the "pause interval" during hip thrust. In Moscow, when Zhao Haohuan thrusts his hip, there's a brief pause of 0.005 seconds after the thigh swings forward to a high position.

This can create a sense of imbalance within oneself, making it easy to be restricted during rapid bursts of energy.

He was unable to achieve the expected results and performance range that the champion model had assigned him.

Well now.

Through long-term training, Zhao Haohuan has reduced this pause interval to 0.003 seconds.

Make the hip thrust movement more fluid, and your stride frequency will naturally increase.

The value of this "rhythm rehearsal" lies in...

Allow your body to adapt to the high-speed rhythm of the burst in advance under low load, so as to avoid "disorder of movement" caused by sudden acceleration after 50 meters.

When he crossed the 50-meter mark, his hip extension frequency was close to the level required for explosive power. At this point, he only needed to increase the intensity of his exertion to smoothly enter a state of maximum speed.

No need to spend time adjusting the rhythm anymore.

This laid the foundation for him to seize the initiative in the 50-60 meter burst of speed.

Randy's technical skills and theoretical knowledge had improved significantly over time, which allowed him to effectively train Zhao Haohuan.

Actually, it's more like when he was training Su Shen in the original timeline.

It became even easier to handle.

Even more meticulous.

The goals are clearer.

Just like now, the task he gave Zhao Haohuan in this part is:
The core logic of the 40-50 meter hip delivery technique —

To build a "connecting bridge" for rapid development.

Zhao Haohuan's hip delivery strategy in the 40-50 meter range is essentially about building a "bridge" connecting "accelerated accumulation" to "rapid burst".

The 40-45 meter "elastic energy storage" solves the "energy reserve" problem, ensuring a sufficient power source during the burst.

The 45-50 meter "muscle awakening" solves the "power output" problem, allowing the core muscle groups to respond to explosive commands in a timely manner.

The "rhythm rehearsal" that runs throughout the entire process solves the problem of "movement adaptation".

This allows the body to seamlessly transition to the high-speed state during bursts of power.

The hip thrust in this phase, while lacking the explosive power of the burst after 50 meters, lays the groundwork for the final explosion.

It's like a meticulous "pre-battle preparation," allowing the body to smoothly switch from "acceleration mode" to "burst-ready mode" through precise control of energy, muscle groups, and rhythm.

When Zhao Haohuan ran 50 meters, the muscles around his hip joints were full of energy, his deep power source was fully awakened, and his stride frequency was adapted to the high-speed requirements.

Once you exert all your strength during the next hip thrust, you can instantly break through the speed threshold and enter the true period of explosive speed.

Randy did all that?

The reason has now been revealed.

That is.

Extreme speed.

He wanted to make Zhao Haohuan's speed reach its limit.

To raise it to new limits.

He wanted to make Zhao Haohuan...

His comprehension is second only to Suarez and Bolt.

The original timeline might have only included peak Guy.

Only those who can do it.

It's about improving, improving, and improving again the six-second burst of power.

To put it simply...