Prevent excessive flexion or injury of the knee joint.

Then, the energy transfer efficiency of lower limb motor chains is improved through stable knee joints.

Enables strength to be transmitted from the hip to the ankle more effectively, thereby pushing the body forward and speeding up.

This is because the appropriate knee extension torque can adjust the movement trajectory of the lower limbs.

Keep the body in good posture when activated.

Reduce energy loss.

What Mills handles here is really a link.

Bolt may not know anything.

but……

Mills understands it all.

Step 2.

Through the relationship between changes in hip angular velocity and muscle contraction, Bolt's Hill equation and muscle contraction characteristics are created.

I saw that Bolt's hip angular velocity accelerated from 85° to 155° in 0.2 seconds.

The Hill equation shows that there is an inverse proportional relationship between the force generated by muscle contraction and the speed of muscle contraction.

During the process of hip acceleration, muscles around the hip joints such as gluteus maximus and iliopsoas muscles play a major role.

When the muscles start to contract, the muscles can produce a greater contraction force due to the low initial angular velocity of the hip joint.

Then as the hip angular velocity increases, the muscle contraction force gradually decreases, but... the contraction speed increases.

This force-speed relationship, if handled properly, can enable the hip joint to achieve rapid acceleration in a short period of time.

Look at Bolt's step.

The gluteus maximus contracts with greater strength.

Provides initial rotational power to the hip joint.

As the hip angular velocity increases.

The muscle contraction speeds up.

Bolt then continued to push the hip joint to accelerate rotation.

This will drive the lower limbs to swing quickly.

Achieve the acceleration of the body and move forward.

Another step.

The rapid increase in the angular velocity of the hip joint... means that a large amount of energy is converted into the rotational kinetic energy of the hip joint.

During this process, muscles convert chemical energy into mechanical energy through contraction, providing power to the movement of the hip joint.

at the moment……

New efficient energy conversion.

It is one of the key factors for Bolt's outstanding performance in the new season.

Millsky attempted to allow Bolt to devote more energy to accelerated hip joints in a short period of time through reasonable muscle contraction patterns and nerve control.

This results in faster startup speed.

In addition, the rapid rotation of the hip joint is used to drive the coordinated movement of the entire lower limb movement chain.

Further improve the body's forward efficiency.

This is the new startup mode Mills created for Bolt.

The same sentence.

Bolt himself may not know why he did this.

What is the reason for doing this?

Can.

Mills knows it enough.

Bolt's brain is not that good.

The specific principles and processes cannot be analyzed.

Can.

He has a talent, which is that his body can quickly master the things arranged by Mills.

It doesn't matter if you don't understand.

Strictly implement.

I don't understand the principles.

Just make it your body.

But such a talent is too rare.

You don't understand ordinary people.

It is also difficult for your body to master thoroughly.

Bolt is the typical "brilliant talented athlete".

No need to know why.

As long as someone tells him how to do it.

As long as Mills controls the direction well.

Then Bolt can...

Excellent.

at this point.

It is also a talent that Blake does not have.

Bang.

Another step.

Four steps of gold.

The last step.

It is also Mills' last kick to Bolt to start optimization. The stretch-shortening cycle mechanism is created through the principle of hamstring centrifugal-centripe contraction conversion efficiency.

The so-called stretch-shortening cycle mechanism is a muscle movement mode, which refers to the muscles quickly entering the process of centripetal contraction after centrifugal contraction, with a short transition stage in the middle.

For example, when jumping vertically, first squat down to lengthen the muscles and enter the centrifugal stage, and then jump hard to enter the centripetal stage. This process reflects the SSC mechanism.

Why Mills did this is the reason-

During the centrifugation phase, the muscles are rapidly elongated, just like a spring is stretched, and the tendons and muscles store elastic energy.

The transition phase, also known as the equal length phase, is a brief transition between centrifugation and centripetalism. At this stage, the body needs to maintain stability to ensure the smooth transmission of energy.

This chapter is not over, please click on the next page to continue reading! In the centripetal stage, the muscles contract rapidly, releasing the previously stored elastic potential energy.

This will burst out with greater strength and make the athletic performance better.

For example, the current four steps of gold.

At the start of the Bolt sprint.

The hamstring muscle first undergoes centrifugal contraction.

During hip extension and knee flexion, the hamstrings are elongated to store elastic potential energy.

Subsequently, the hamstring muscle quickly contracts centripetal, releasing stored elastic potential energy, and the muscle itself also produces contraction force.

Then the superposition of this elastic potential energy and the active contraction force of the muscles allows the hamstring muscle to produce greater force and power output during the centripetal contraction stage.

This is Mills' last step in building Bolt's startup capabilities.

Utilize SSC mechanism.

To enhance Bolt's shortcomings.

Effect.

Quite obvious.

Even though Carter started very hard in front, he should have surpassed the heroes, even Bolt should have been left far behind.

result.

Bolt is by Carter's side.

Not...
To be continued...