The Su God of the Reopening of the Sports Arena

Chapter 2158 New move! Three-dimensional ground reaction force control technique

This shot.

Su Shen not only shattered the barrier that activated the limit.

I guess he had broken the limit of the acceleration zone just now.

I have waited for so many years.

I have practiced hard for so many years.

Isn't it just waiting until now?

10 years of layout planning.

Just for this day.

Shocking the world.

Boya Acceleration Zone...

like.

It seems that I didn’t catch up.

It seems that the gap has not been narrowed.

This……

is it possible?

Maybe there is.

But the gap is so big that it cannot be seen by the naked eye.

In other words.

It has become very small.

extremely small.

The meat was also difficult to judge.

Before Su Shen, when facing Bolt, you could see that Su Shen was leading the whole way.

But in fact, you look at the data separately.

You will be able to see it very clearly.

In fact, Su Shen can lead in the future.

The most important thing is super start.

When there is a lot of pulling here.

It can directly pull away from Bolt by about 0.1.

Behind.

They are all in a state of being chased.

So it means that the entire future is ahead.

But in fact, let’s break down the data.

You will be able to discover where Su Shen is truly ahead.

Only the starting ten meters.

in this situation.

The signs of this already appeared last year.

this year.

There has been a complete change.

And you have to know.

This Bolt is not the original Bolt.

This is a wave of...

Bolt after hard work and self-discipline.

This one.

Su Shen can handle it.

This can only explain.

Under Mills' arrangement, Bolt has indeed made great progress in this area.

but.

On Su Shen's side.

Bigger.

Because it starts now.

Su Shen is going to come up with more new things.

Do you think the above is very high-end and awesome?

Sorry.

front.

It was really just an appetizer.

Finished eating these.

The main meal has just begun.

"Start running midway!"

“This is Bolt’s strong area!”

Yes.

Mitchell is right.

This is Bolt's strong area.

and so.

Usain.

Take a good look at it.

This.

It’s the Want Want gift package prepared for you.

Bang bang bang bang bang.

The acceleration zone is coming to an end.

Su Shen was ready to raise his head and run.

So does Bolt.

After the acceleration zone, he had surpassed Carter and came in second place.

Yes.

So the scene.

It became Suarez vs Bolt again.

The status of red lightning vs black lightning.

This.

Of course, this is also the scene that everyone wants to see when buying tickets for this game.

Promotional slogan and video.

Isn't it built around these two people?

The rest.

It’s not that I’m not strong.

Under the influence of this era, changes to varying degrees have actually occurred.

Or rather, evolution.

but……

After all, I still can't keep up with the pace of these two lightnings.

It started with Suarez defeating Bolt head-on in last year’s Olympic final.

He is already the real lightning.

Standing opposite Bolt as an equal.

The stage of the times.

No matter how strong you were before.

He is a Tiger-level player.

Still a giant.

There is actually no difference at this time.

Everyone should give way to these two people.

These two people are just as everyone expected.

They came into direct confrontation.

Su Shen uses his killer move again.

As I said before, the previous technologies are connecting technical nodes.

In fact, it’s just a precondition.

Now is the time to start showing off your real killer moves.

This is……

Three-dimensional ground reaction force control!

What is three-dimensional ground reaction force control?

When the athlete's foot contacts the ground, an interaction occurs. According to Newton's third law, the ground will give the athlete an equal and opposite reaction force, which is the ground reaction force.

This force can be broken down into three dimensions: vertical (Fy), horizontal (Fx), and front-to-back (Fz).

Vertical force (Fy) is mainly used to support the athlete's weight, overcome gravity and achieve the body's levitation.

Horizontal force (Fx) is the primary source of force that propels the athlete forward and accelerates.

The force in the anterior-posterior direction (Fz) is relatively small, but it also plays an important role in maintaining the balance and stability of the body.

The relationship between three-dimensional ground reaction force and sprint performance is:

Vertical direction:

Greater vertical ground reaction force can enable athletes to obtain greater upward momentum at the moment of contact with the ground, which helps to shorten the support time, increase the height and time of the jump, and thus create better conditions for the next step of pushing and stretching.

For example, elite sprinters have a higher peak vertical ground reaction force at the moment of take-off, which enables them to quickly push their bodies off the ground and achieve an efficient take-off phase.

Horizontal:

Horizontal ground reaction force directly affects the athlete's acceleration and speed. By increasing the horizontal ground force, the athlete can obtain greater forward propulsion, thereby increasing the starting and mid-run speed.

Studies have shown that during the acceleration phase of sprinters, the magnitude of the horizontal ground reaction force is positively correlated with the acceleration, and during the maximum speed phase, the maintenance of horizontal force is crucial to maintaining a stable speed.

Front and rear direction:

Although the forward and backward forces are relatively small in value, they play an indispensable role in maintaining the body's lateral balance and stability. During sprinting, athletes need to fine-tune the forward and backward forces to keep their bodies moving in a straight line on the track and avoid wasting energy or affecting speed due to lateral deviation.

Now you understand a little bit.

Combined with the fact that Su Shen was in the plateau area before.

The reason is to constantly impact the vertical force, horizontal force and other related technical nodes.

That's right.

That was just a trial run.

The real connection point.

It's here.

During the starting phase, the athlete adopts a crouching starting posture and uses the rapid contraction of the leg muscles to push off the ground backward and downward, thereby obtaining a large horizontal ground reaction force and allowing the body to quickly gain initial velocity.

At this time, the vertical ground reaction force will also increase accordingly to support the body to be lifted quickly from a low posture.

Research from Su Shen's laboratory shows that the peak value of the horizontal component of the ground reaction force during the starting acceleration phase is about 1.46 times that of the maximum speed phase, highlighting the key role of horizontal force in the starting phase.

Entering the acceleration phase, the horizontal ground reaction force continues to push the athlete to accelerate. As the speed increases, the vertical ground reaction force also needs to be maintained at a certain level to ensure the stability of the body and the height of the flight, creating conditions for subsequent pushing and stretching.

At this stage, the joint of the supporting leg continues to stretch, and the hip muscles exert force to achieve an organic combination of pushing and swinging. The joint muscles generate hip extension torque in the early stage of support, releasing energy to do positive work and pushing the body forward.

Then the hip flexors work to absorb the energy generated by the hip extensors, preparing to drive the supporting leg forward into the swing phase.

The next stage.

That is, what happens after entering the mid-run stage?

During this phase, the maintenance of horizontal ground reaction force is crucial to keeping the speed stable. At this time, athletes need to minimize the loss of horizontal force through efficient technical movements and muscle coordination.

At the same time, the vertical ground reaction force must ensure that the body takes off and lands smoothly. The dynamic characteristics of the hip and ankle joints are significantly related to the maximum running speed.

Greater hip extension and flexion torques and ankle dorsiflexion torques can generate greater propulsive forces, and increased hip extension can improve the effectiveness of ground reaction forces by increasing step length.

Dorsiflexion of the ankle joint helps increase the reaction force of the sole of the foot and increases forward driving force.

Based on the relationship between three-dimensional ground reaction force and sprint performance, we can know that:

Vertical and three-dimensional ground reaction forces:

The first thing is support and flight.

Vertical ground reaction force directly affects an athlete's support time and take-off height.

Elite sprinters are able to generate a large peak vertical ground reaction force at the moment of contact, which allows them to quickly push their bodies off the ground, shorten their support time, and increase their take-off height and time.

Here comes the point!

Get the small stool moving!

For every 0.01 second reduction in support time, stride frequency can be increased by 1-2 steps per minute.

During his peak period, Bolt's support time was only 0.08 seconds, which was one of the important factors for him to achieve the dual advantages of "cadence + stride length".

Of course, this is the current limit of Joyner's humanity.

There is still a gap.

But it's already quite terrifying.

Few men could catch up.

In the vertical direction, the ground reaction force interacts with gravity. If the athlete can convert the energy generated by pushing off the ground into upward and forward kinetic energy through reasonable technical movements...

When landing, the lower limb joints are used for cushioning, which reduces energy loss and stores elastic potential energy for the next extension.

So theoretically you can...

Proper lower extremity stiffness can reduce the impact of landing, reduce the risk of injury, and enable the foot to rebound quickly, utilizing the elastic energy stored in muscles and ligaments.

Reduce energy loss.

Improve energy utilization efficiency.

Make running more efficient.

This is the first aspect to be exploited for three-dimensional ground reaction force optimization.

The second is the relationship between the horizontal direction and the three-dimensional ground reaction force:

Horizontal ground reaction force is the main driving force for athletes to start and accelerate.

During the starting phase, the strong horizontal ground-pushing force enables the athlete to obtain greater acceleration.

Then it’s time to run midway.

Continuous and stable horizontal force helps maintain high-speed running.

Research by Su Shen Laboratory shows that the horizontal ground reaction force value and its ratio to the ground reaction force are linearly related to the speed of movement, and the horizontal ground reaction force power is quadratically related to the speed of movement.

What do you mean?

To put it simply -

Reduce braking!

When landing, braking force will be generated because the landing point is often in front of the center of gravity.

Athletes need to use reasonable technical movements, such as keeping the knees fully bent and landing close to the center of gravity, to reduce the braking effect and use more energy to propel forward.

For those who are faster, especially top athletes, the "gripping the ground" technique is emphasized. When the foot is falling but not touching the ground, the hips are actively extended, creating a backward "gripping the ground" movement. This brings the landing point closer to the body's center of gravity and effectively reduces the forward extension of the calf during traditional running, thereby greatly reducing the braking force. At the same time, forward propulsion force is generated in the "gripping the ground" link, which, combined with the back push, increases forward momentum.

Braking is reduced.

Can it be faster and smoother?

Is there no upper limit?

Since it is a three-dimensional ground reaction force, there is still one missing.

Front and rear direction.

Although the ground reaction force in the fore-and-aft direction is relatively small in magnitude, it plays a key role in maintaining the body's lateral balance and stability.

During sprinting, the athlete's body will be disturbed by various external forces, such as air resistance, centrifugal force in curves, etc. By fine-tuning the forces in the forward and backward directions, the athlete can keep the body moving in a straight line on the track and avoid wasting energy or affecting speed due to lateral deviation.

After these three forces are reintegrated.

Su Shen ran on the way.

Also began to show differences.

Bolt thought, OK, Sue, you can do it.

It's great that you can run like this in the front.

Start, I can't outrun you.

You can hold your own against me in the acceleration zone.

That's fine.

Then take a look.

Are you running on the way???

Can you keep up with me in running?

It's normal for Bolt to think so.

Running on the road has always been Su Shen’s weakness.

Or it could be said that it was the beginning of Su Shen’s transformation from strong to weak, and from offense to leadership.

Of course, it’s not just Su Shen.

All the ultimate up-and-coming athletes.

Everyone has this problem.

Even Maurice Green, who doesn't seem to have this problem, can only do well in each segment.

If you help him have a good future.

Then there will be problems in other links.

The rest of the steps are done.

It can't be that fast ahead.

It is normal for Bolt to think so.

Su Shen is indeed far ahead of him here.

He didn't catch up with anything in the acceleration zone.

Even some of it can be ignored with the naked eye.

but.

Running on the way.

Can you still hold me up while running?

Sue.

Can enter mid-run.

When everyone started to look up.

Bolt suddenly realized...

Not right.

This guy.

Run on the way.

how.

So fierce too???

I saw Su Shen pushing forward violently.

Use the three-dimensional ground reaction force control method to optimize the joint angles while running!

In sprinting, the coordinated movements of the hip, knee, and ankle joints require precise control.

This is especially true when you start entering the highest speed zone during the run.

Su Shen used the three-dimensional ground reaction force to control the ball, and bent his knees and hips appropriately at the moment of landing to increase the cushioning.

Reduce impact force.

At the same time, prepare for each subsequent push-off.

The knee flexion angle when landing is 130°-140°.

This effectively cushions ground reaction forces.

And it provides a good force foundation for stretching.

During the stretching phase.

Full hip and knee extension allows for efficient transfer of muscle power to the ground.

Generates greater ground reaction force.

Increase the extension angle of the hip joint.

This is……

improve.

Step length???

In other words.

Su Shen’s previous series of operations.

After starting to open up the cadence limit further.

in one breath.

Never stop.

I've also gotten the hang of step length.

This is to...

All at once?

Just one game and then a big wave of accumulated strength will come?

Yes.

you guessed right.

This is exactly what Su Shen planned.

He wanted to take advantage of this opportunity, not only to open the stride rate limit, but also to increase the stride length.

allow oneself.

Completely enter a whole new realm.

Do you think you are the only one who has had a breakthrough?

Sorry.

Than breakthrough.

I'm not inferior to anyone.

You come Bolt.

Same thing!

The foundation has been laid before.

Preparation for the plateau.

Now it's time to show its power.

Cadence and stride length.

This time Su Shen will come along.

Just want to catch them all!!!

Let yourself complete another evolution!!!

Super evolution! ! !

Completely transcend.

My former self.

ps: First update.

The technical chapter is a bit slow, I will try to speed up, keep going! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

Give yourself a cheer up!!!!!!!!!!!!!!!!

rush!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!