The Su God of the Reopening of the Sports Arena

Chapter 2440 While the world was still in 2015, I was already in 2025.
"Everyone is in position!"

"preparation!"

BOOM ...

Su Shen heard the gun and started.

The response was good.

His high-altitude acclimatization equipment had already prepared his body for this environment, allowing him to quickly get into the zone even on the plains.

There's no need to spend time adapting once you get here.

This is actually why there weren't many high-altitude competitions in the past. Mainly because if your country isn't located in a high-altitude region, and you go there to compete, you need a relatively long period of physical adaptation. Otherwise, let alone performing at your best, you'd be lucky if you didn't experience physical discomfort and drag down your performance.

Of course, if you were born in a high-altitude region, there's nothing that can be done. For example, the mountain god Omanyala is a typical example.

Don't worry about the results of the plains or the competition.

Anyway, I'm the king of kings on the plateau.

It doesn't matter if you're an Olympic champion or a World Championship champion.

Everyone who comes here has to kneel down before me.

Even if you have a weak digestive system, you'll have problems here. This is called winning without fighting.

Jacobs, the 100-meter champion at the Tokyo Olympics.

I give this a thumbs up with tears in my eyes.

Su Shen activated!

Bang bang bang.

The Golden Three Steps.

Efficient transmission of ground reaction force + hip joint drive for force generation.

Continuous and rapid extension.

Bang bang bang.

Four steps again today.

Violence widens the gap between them and everyone else.

Of course, it's normal for him to widen the gap.

Because the rest of the people are at this level.

No one can stop Su Shen's attack on the international stage, let alone on the domestic stage.

Fortunately, these athletes in China are used to this.

Which athlete standing here didn't come from Ersha Island?

I've long since become numb to my surprise.

If Su Shen didn't get a head start, it would be strange if I had so many.

accelerate!
Bang bang bang.

First, establish the energy metabolism (SSC cycle) and motion posture regulation (moment of inertia) in the "support-swing" transition.

Next, we began to establish the intrinsic relationship between the forward swing reset technique and the SSC cycle acceleration.

Bang bang bang.

The core requirements of the SSC cycle transition phase have been established, and we have begun to try "push-stretch-swing" transitions with little or no delay.

10 m.

The forward swing starts immediately after the backswing ends, eliminating the "idle period".

15 m.

The forward swing and the extension of the supporting leg are synchronized to enhance the transmission of propulsion.

20 m.

The release of SSC cycle energy begins.

The key lies in this.

The forward swing reset technique optimizes the timing of muscle contraction.

Bang bang bang.

During the forward swing, the hip flexor muscles contract, which in turn activates the hip extensor muscles of the supporting leg.

Bang bang bang.

At the apex of the forward swing, the ankle dorsiflexes, preparing for the cushioning and energy storage phase.

25 m.

The synergistic mechanism of forward swing reset technology and dynamic adjustment of rotational inertia is introduced.

The core requirement for dynamic adjustment of rotational inertia has begun to be met.

Create a dynamic balance between "increased swing radius and stable swing angular velocity" in the body.

During the forward swing phase, fine-tuning of the joint angles achieves coordinated optimization of "swing radius and angular velocity".

26 m.

Dynamic gradient adjustment of knee flexion angle.

27 m.

The contraction speed of the iliopsoas muscle is increased synchronously.

28 m.

During the post-swing phase, energy pre-storage provides torque support for the adjustment of rotational inertia.

29 m.

At the end of the backswing, the lower leg extends moderately to lengthen the hip extensor muscles and pre-store energy.

30 m.

The near-seamless connection between the rear swing and the front swing is intended to reduce torque transmission loss.

Concentrate your mind and standardize the movements of the forward swing reset technique.

It means reducing the difficulty of neural modulation.

Gradually, I looked up.

Transition between sprint and mid-race.

Bang bang bang.

All I saw was Su Shen.

Prepare for landing at the apex of the forward swing.

Enhance ground reaction force feedback.

This is to shorten the SSC loop transition time.

Optimize dynamic adjustment of rotational inertia.

Running along the way.

At this point, Su Shen was already far ahead of the others.

Hips ready... sustained high power output!

The body's angular momentum is stable.

Precise control of rotational inertia.

get ready.

The speed has increased dramatically!
Su Shen's hip flexor-hip extensor muscle group rapid switching system.

Specifically, during the forward swing phase of the leg, the iliopsoas muscle contracts with maximum power to drive the thigh forward. When the thigh swings forward to a hip flexion angle of 70°-80°, the iliopsoas muscle quickly stops contracting.

The gluteus maximus immediately shifts from eccentric to concentric contraction, quickly pulling the thigh back to the rear, completing the "forward swing-backward swing" reset process.

Initially, this was done to achieve sustained high power in the hip joint.

Prepare to shift gears.

35 m.

Optimization of the timing of hip muscle activation.

40 m.

Maximize the use of the hip muscle lever arm.

45 m.

The symmetrical cancellation of the angular momentum of the upper and lower limbs.

50 m.

Maintain a neutral and stable trunk position. Then, before the peak speed arrives, actively suppress the "forward swing of the lower legs" phenomenon.

The optimized distribution of foot mass is also happening simultaneously.

The critical point for the backswing is ready.

The forward acceleration point is ready.

The brake reset point is ready.

The connection point for exerting force is ready.

Prepare for a rapid burst of energy.

The range of angle change has been optimized.

Linearization of motion trajectory.

Specifically, this is manifested as follows:

Precisely activate the core hip flexor muscles and unleash their contraction potential!

Inhibit excessive contraction of antagonistic muscle groups and reduce energy consumption!
Optimize the working sequence of synergistic muscle groups to build a "power chain"!
Shorten the energy transfer radius of the swing leg and increase angular velocity and linear velocity!

Optimize the timing of "pedaling and swinging coordination" to eliminate gaps in energy transfer!
Adjust the direction of force transmission to reduce energy loss during decomposition!
Optimize hip joint movement trajectory and improve exercise efficiency!

Bang! ! !
A six-second burst of power!

Super 3 bursts forth!

Su Shen felt an instantaneous explosion!
This is actually the forward swing reduction technique, which expands the range of motion of the hip joint through "active hip flexion + full hip extension".

The maximum hip flexion angle is increased to 50°-55°, and the maximum hip extension angle is increased to 20°-25°.

From a muscle working perspective, the increased hip flexion angle increases the contraction amplitude of the iliopsoas muscle from 20mm in the previous running method to 30mm, increases the contraction speed by 25%, and increases muscle output by 30%.

The increased hip extension angle increases the stretch of the gluteus maximus from 15mm to 25mm, and the stored elastic potential energy increases by 60%.

The elastic force released during the hip extension phase is increased by 45%.

In terms of joint mobility, the increased range of motion of the hip joint increases the "effective movement time" within the gait cycle, that is, the time for muscles to exert force to propel the body forward, from 180ms in the previous running method to 240ms, and the proportion of effective movement time increases from 45% to 60%.

The power output of the hip joint per unit time increases significantly, which is equivalent to...

It breaks through the previous limit of "short effective exercise time" in running methods.

Next, coordinate the movement sequence of the hip, knee, and ankle joints!
Eliminate joint movement conflicts!

Prepare your joints for an ultimate burst of power!
The core competitive requirements at the highest speed stage, which Suarez and Randy essentially mean the same thing, are three points—

The current competitive goal at the highest speed stage is not simply to further increase speed, but to achieve "the longest time to maintain peak speed". Its core requirements can be summarized into three dimensions.

First, there is the "ultra-stable maintenance" of power output. During this stage, the power of the hip joint muscle group needs to be stable at more than 90% of the individual's peak power, and the fluctuation range is strictly controlled within 3%. Once the power decay exceeds 5%, the speed will drop by more than 0.2m/s within 0.5 seconds.

Secondly, the coordination of movements must be "extremely precise." The angular momentum coupling coefficient of the upper and lower limbs must be kept above 0.95, and the rotation angle of the trunk around the vertical axis must not exceed 0.2°. Any slight deviation in any movement will be amplified through the biomechanical chain, leading to a surge in energy loss.

Thirdly, the "maximization of exercise efficiency" is required. During this stage, the energy utilization efficiency needs to reach more than 55%, and the energy loss of each step should be controlled within 8J. By reducing the energy consumption of ineffective movements, the peak speed maintenance time can be extended.

After all, I am a top performer, and it is too difficult to compete at the top speed. With the speed already getting higher and higher, how can I maintain it better?
This might be a better breakthrough point right now.

The technical constraints are based on key biomechanical parameters at the highest speed stage.

The first thing to do is to establish the "rigid transmission" principle of power output in the powertrain.

The so-called "rigid transmission principle" means that "rigid transmission" is the core principle of the kinetic chain power output during the highest speed stage of sprinting. Its essence is to construct a mechanical transmission path that is "without energy leakage and without power interruption" through precise control of the neuromuscular system and stable constraints of joint posture, so as to ensure that the peak power generated by the hip muscle group is efficiently transmitted to the ground and converted into forward power.

This principle can be broken down into three key dimensions: "force efficiency optimization of the core hub", "rigid guarantee of the transmission path", and "temporal coordination of pedaling and swinging connection".

Core hub.

It is the three-dimensional optimization principle of "force-time-effect" for the hip muscles.

Since the hip is the core output hub of the sprint kinetic chain, its power transmission efficiency depends on the coordinated matching of the "force magnitude, timing accuracy, and energy conversion efficiency" of the muscle groups.

Therefore, Randy's process is the driving force behind the "rigid transmission".

From the perspective of the mechanical basis of power output, hip power originates from the alternating explosive contraction of the hip extensor and hip flexor muscle groups, and the force exertion effect of both is highly dependent on the mechanical adaptability of the joint angle.

During hip extension, the efficiency of gluteus maximus activation is positively correlated with the hip joint's posterior swing angle:
When the hip joint swings back to 10°-15°, the gluteus maximus tendon is pre-stretched by 12%-15%. At this time, the muscle enters the optimal energy storage state of the "lengthening-shortening cycle". The efficiency of converting elastic potential energy into kinetic energy can reach more than 85%, and the peak force at the moment of extension is increased by 20%-25% compared with the state without pre-stretching.

During hip flexion, the power output of the iliopsoas muscle is a quadratic function of the hip flexion angle. When the hip flexion is 75°-80°, the muscle fiber contraction speed and the lever arm length are optimally matched.

At this point, the iliopsoas muscle can output up to 95% of its peak power, which is the core driving force for the forward swing of the thigh.

From the perspective of temporal coordination of neural control, "rigid transmission" requires the hip extension and hip flexion muscle groups to achieve "zero gap" in force connection, which relies on the "pre-activation mechanism" of the neuromuscular system.

When the gluteus maximus enters the final stage of extension, the central nervous system has already sent an excitation signal to the iliopsoas muscle through proprioceptive feedback, enabling it to complete electromyographic activation within 0.003 seconds.

This is manifested by a rapid increase in the root mean square (RMS) value of electromyography to avoid the occurrence of a "dynamic vacuum period".

This coordinated pattern of "extensors not yet relaxed, flexors already activated" keeps the fluctuation range of hip joint power output within 3%.

For ordinary athletes, due to delayed neural activation, power fluctuations can reach 8%-10%, which may directly lead to a "disconnection" in power transmission.

From the perspective of energy conversion efficiency.

The "rigid transmission" of the hip muscles is also reflected in the extreme compression of "ineffective energy consumption".

Through long-term training, elite athletes can reduce the "no-load activation time" of the hip flexor-hip extensor muscle group transition from 0.015 seconds to 0.006 seconds, thus reducing energy waste caused by muscle contraction.

Meanwhile, the motor unit recruitment of the gluteus maximus and iliopsoas muscles is highly selective. During the highest speed phase, more than 80% of type IIa fast-twitch muscle fibers can be preferentially activated. These fibers contract three times faster than slow-twitch muscle fibers and have higher energy utilization efficiency, generating more power with less ATP consumption.

This is the process of repeated critical thinking.

Muscle exertion patterns—the source of power in sprinting.

This is one of the propositions that began with the scientific development of sprinting in the 80s.

Running, as one of the most basic forms of movement for human survival, has long attracted people's attention.

As early as the 1930s, American scholar Fcnn (1930) began to study the work done by sprinters against gravity and the changes in work at different speeds. Kistler (1934) and Dickinson (1934) respectively studied the effects of the starting reaction force and the distance between the starting feet on running speed. These studies pioneered the research on sprints.

Subsequently, researchers analyzed the characteristics of sprinting from multiple perspectives, including kinematics, dynamics, electromyography, energy metabolism, and talent selection and training, gradually deepening their understanding of the specific characteristics of sprinting.

Behind the rapid development of sprinting worldwide is a significant improvement in the level of scientific training, which is primarily reflected in the understanding of sprinting force patterns.

Force application mode refers to the specific and rational force application pattern exhibited by the neuromuscular system during human movement, which meets the requirements of the specific sport. This mode aims for the effectiveness and economy of the movement, providing maximum power and minimizing resistance. The 100m sprint demands extremely high precision and dynamic control of neuromuscular force application; any error or even minor flaw by the athlete can essentially eliminate their chances of winning.

Therefore, the force application pattern is particularly important for the 100m sprint, a typical cyclical short-distance event. Developing a force application pattern that aligns with the biomechanics of the sport and the individual athlete's condition through scientific training methods is essential for every world-class athlete to achieve outstanding results.

Su Shen also follows this principle here.

The 1940s.

Mann et al. (1980) conducted a biomechanical analysis of the lower limb supporting leg movement of elite male sprinters during high-speed running. They concluded that a certain efficient force pattern formed by the muscles of the hip, knee, and ankle of the supporting leg is an important factor affecting running speed, and pointed out the key role of sprint force pattern in speed driving force and athletic performance.

Subsequently, basic research by some scholars has directly or indirectly supported this view. Lemaire et al. (1989) conducted kinematic tests on eight high-level sprinters from Canada and the United States. Using inverse dynamics, they calculated the power output of the hip, knee, and ankle muscles in the swing leg during indoor and outdoor high-speed running. They found that although many coaches attach great importance to knee extension and flexion strength training in their sprint training programs, the power (explosive force) analysis results showed that the hip joint muscles were the main driving force of the lower limbs throughout the swing phase. This also suggests that the training of hip extension and flexion muscles should be given sufficient attention in the weight-bearing strength training programs for sprinters.

This study further clarifies the location and role of the hip extensor muscles in enhancing lower limb drive, and provides guidance for strength training for sprinters.

However, judging from relevant research in the 1980s and 1990s, due to the limited research on dynamics and electromyography at that time, most of the research was basically limited to the field of kinesiology.
This study analyzes the muscle exertion patterns in sprinting solely from the perspectives of movement manifestations and muscle anatomy and function.

This is why in those days, many sprinters used steroids, which are now commonly used in bodybuilding.

Especially on Amelika's side, almost everyone is a muscle man.

This can easily lead to a bottleneck.

After 2000, sprint research developed rapidly. Belli et al. (2002) used a force table, high-speed camera, and electromyography to test the lower limb joint torque and power of nine middle-distance runners at slow, medium, and maximum speeds. Through kinematic, dynamic, and electromyographic synchronous studies, they found that—

The role of the ankle and knee extensors is to generate high joint stiffness before and during landing, while the hip extensors are the main driving force for forward movement of the body.

Subsequently, Bezodis et al. (2008) used a force table and high-speed camera to study four 100m athletes of different levels, and used inverse dynamics to analyze in more detail the dynamic characteristics of the hip, knee, and ankle joints in the lower limbs during the support phase of the run, in the early and late stages of the support phase. The results showed that in the early support phase at maximum speed (10.37 m/s), that is, from the foot landing to the point where the body's center of gravity is perpendicular to the landing point, the force (power) was mainly generated by the hip extensor muscles. In the late support phase (propelling phase), the hip extension torque and plantar flexion torque were the main driving forces.

Looking further, in the early stage of the propulsion phase, the hip extension torque is the main driving force. However, in the later stage of the propulsion phase, the eccentric contraction of the hip flexor muscles counteracts the hip extension inertial torque to reduce the hip extension angular velocity, preparing for the next phase cycle. At this time, the plantar flexion torque increases and becomes the main driving force in the later stage of the propulsion phase.

Through segmental interaction dynamics research, it was found that in the later stage of swing (before the maximum flexion of the hip joint), the hip extensor muscles perform eccentric contraction to counteract the inertial torque of hip flexion, thus slowing down the flexion speed of the hip joint. Afterward, the hip extensor muscles perform positive work to actively swing the leg down (hip extension). In the support phase, they perform positive work to counteract the external torque, thus continuously extending the hip joint.

From the late swing phase to the mid-to-late support phase, the hip joint consistently exhibits hip extension torque, with the hip extensor muscles performing eccentric and concentric contractions sequentially. Furthermore, Huang et al. (2013), using segmental interaction dynamics to study elite sprinters, found that the role of the hip extensor muscles during the swing phase is equally important as that during the support phase. Morin et al. (2015) demonstrated that the generation of horizontal ground reaction force is related to the highly activated electromyographic activity of the hamstring muscles before ground contact and the hamstring muscles capable of generating significant eccentric force. Therefore, the working range and nature of the hip extensor muscles are more clearly defined, emphasizing not only hip extension in a closed-chain configuration but also active hip extension in an open-chain configuration.

and this.

That is, at the world node.

The current peak and forefront of sprinting.

It was exactly 2015.

And to fast forward to what Su Shen is doing now—

The theoretical stage will take another six or seven years, and by the time Ralph Mann passes away in 2025, it will still be in the theoretical stage and will not have fully entered into actual combat training.

and so.

Once you understand the changes over the years and the current stage of the world's kinematics system.

Only then can you understand better.

Su Shen and the others.

Just how ruthless are they?

How advanced it was.

It's as if the whole world is still in 2015.

But it's already 2025 for him.

Even beyond 2025.