He Was Too Small for Kyokushin... Then He Started Knocking Out Giants 🥋 | Ryu Narushima.

He Was Too Small for Kyokushin... Then He Started Knocking Out Giants

In a World Built for Bigger Fighters, He Looked Completely Out of Place

Kyokushin Karate is not known for being gentle.

It is one of the most physically demanding forms of full-contact Karate in the world.

Fighters collide at close range.

Powerful low kicks attack the legs.

Body punches punish the ribs and liver.

And openweight tournaments can place a lightweight fighter directly in front of an opponent who outweighs him by dozens of kilograms.

For Ryu Narushima, that was the problem.

He stood at around 5 feet tall and weighed roughly 141 pounds.

In an openweight Kyokushin tournament, that kind of size disadvantage can look almost impossible to overcome.

But Narushima had something that many bigger fighters could not match.

Explosive speed.

Precise timing.

Devastating technique.

And a remarkable ability to end a fight with one clean moment.

Then the giants started falling.

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Ryu Narushima Wasn't Built to Trade Like a Heavyweight

A smaller fighter cannot always use the same strategy as a heavyweight.

Standing directly in front of a much larger opponent and exchanging powerful attacks can become a losing battle.

Narushima understood that.

Instead of trying to become a smaller version of a heavyweight, he developed a style that took advantage of what made him different.

He moved faster.

He entered and exited range quickly.

He attacked from unexpected angles.

And when an opening appeared, he exploded.

That was the foundation of his fighting style.

Narushima wasn't trying to win through size.

He was trying to make size irrelevant.

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The Weapon That Changed Everything: Ippon

One of the most important ideas associated with Narushima's fighting style was the pursuit of Ippon.

The concept is simple.

One decisive technique.

One perfectly timed attack.

One moment capable of ending the fight.

Against larger opponents, this approach could be incredibly valuable.

A smaller fighter may not want to spend several minutes exchanging raw power.

Instead, the goal becomes finding the exact opening that changes everything.

Narushima became exceptionally dangerous because he was constantly searching for that moment.

A kick.

A punch.

A combination.

A sudden counterattack.

The opening could be small.

But against a fighter with Narushima's speed and precision, a small opening was sometimes enough.

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The Lightning-Fast Roundhouse Kicks

Kyokushin Karate has produced some of the most devastating kickers in martial arts history.

Narushima's kicking ability was particularly dangerous because of the speed with which he could launch attacks.

The roundhouse kick became one of his most important weapons.

A properly delivered kick is not generated by the leg alone.

The supporting foot pivots.

The hips rotate.

The entire body contributes to the movement.

For a smaller fighter, speed can dramatically increase the effectiveness of that technique.

Narushima could launch kicks before larger opponents had enough time to fully react.

And once the attack landed cleanly, size didn't always matter.

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Why Speed Can Become a Weapon Against Size

A larger fighter may have more power.

More reach.

More mass.

But those advantages can come with limitations.

Changing direction may take longer.

Recovering after a missed attack can require more effort.

And explosive smaller fighters can sometimes move in and out of range before the larger opponent establishes control.

Narushima understood distance exceptionally well.

He didn't simply rush forward.

He waited for mistakes.

Then he attacked with sudden acceleration.

The giant might have the physical advantage.

But Narushima often had the first movement.

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The Devastating Liver Shot

Another important weapon in full-contact Karate is the body attack.

The liver is particularly vulnerable to a perfectly placed strike.

A fighter may be physically strong enough to absorb enormous punishment.

But the correct attack to the correct target can completely change the fight.

Narushima's body attacks became part of his reputation as a dangerous knockout artist.

Instead of always searching for the head, he attacked targets that could break an opponent's rhythm and mobility.

This is one of the reasons technique can sometimes overcome raw size.

You don't need to attack everything.

You need to attack the right thing at the right moment.

---

Explosive Combinations

Narushima was dangerous when he attacked with a single technique.

But he became even more difficult to deal with when he combined his attacks.

A kick could create an opening for a punch.

A punch could force the opponent to lower their guard.

A feint could create hesitation.

Then, suddenly, the next technique would arrive.

This ability to connect attacks together is one of the characteristics that separates a good fighter from a truly dangerous one.

The opponent isn't simply defending against one attack.

They're trying to predict what comes next.

Against a fighter with Narushima's speed, hesitation could be disastrous.

---

The KO Master

Narushima became known as "The KO Master."

It was a nickname that perfectly reflected his fighting identity.

Some fighters dominate through constant pressure.

Others win by accumulating points.

Narushima developed a reputation for something different.

He could change the entire fight instantly.

One clean technique.

One perfectly timed opening.

And suddenly, the contest was over.

That ability made him especially fascinating in the Kyokushin world.

Because when a smaller fighter faces a much bigger opponent, the possibility of an explosive finish becomes even more dramatic.

---

Dominating the Lightweight Division

Narushima established himself as one of the standout fighters in the lightweight division.

But dominating opponents closer to your own size is one challenge.

Entering an openweight tournament is another.

The moment weight restrictions disappear, everything changes.

Suddenly, a lightweight fighter can be standing across from an opponent who is significantly taller, heavier and physically stronger.

For most competitors, that is where the physical disadvantage becomes impossible to ignore.

For Narushima, it became an opportunity.

---

The All Japan Openweight Challenge

The All Japan Openweight Championship represented one of the greatest tests imaginable.

There were no convenient weight classes.

No guarantee that the next opponent would be close in size.

The lightweight specialist could suddenly find himself facing one of the biggest Karate fighters in the tournament.

On paper, it looked like a terrible matchup.

But fighting isn't decided on paper.

Narushima brought his own advantages into the ring.

And he knew exactly how to use them.

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When the Giants Started Falling

This is what made Narushima's career so memorable.

The physical difference was obvious.

The opponents were bigger.

They had longer reach.

They carried more mass.

Yet when the fights began, those advantages didn't always produce the expected result.

Narushima moved.

He created angles.

He controlled distance.

Then he attacked.

The smaller fighter wasn't supposed to be the one producing the spectacular finish.

But that was exactly what happened.

Again and again, Narushima demonstrated that the right technique, delivered at the right moment, can make an enormous physical advantage suddenly disappear.

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Distance Was His Invisible Weapon

One of the most important elements of Narushima's style was distance management.

Against a bigger opponent, standing at the wrong distance can be dangerous.

Too close, and the larger fighter can use their strength.

Too far, and the smaller fighter cannot attack.

Narushima needed to operate in the perfect zone.

Close enough to explode forward.

Far enough to avoid unnecessary exchanges.

That ability to control space allowed him to make larger opponents uncomfortable.

They couldn't simply walk forward without consequences.

Because every mistake could create the opening Narushima was waiting for.

---

Timing Beats Strength

This is one of the most important lessons from his career.

Strength matters.

Size matters.

Weight matters.

But they are not the only things that matter.

Timing can change everything.

A perfectly timed attack can land when the opponent is moving.

When they are off balance.

When they are committed to their own attack.

Or when they simply don't see the strike coming.

Narushima's ability to recognize these moments was one of his greatest strengths.

He didn't need dozens of opportunities.

Sometimes, he only needed one.

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The Importance of Tactical Intelligence

Narushima's success wasn't simply the result of being fast.

Speed without intelligence can lead a fighter directly into danger.

He needed to understand his opponents.

He needed to recognize patterns.

He needed to know when to attack and, equally importantly, when not to attack.

That tactical intelligence became essential against larger fighters.

A heavyweight might only need one clean exchange to cause serious damage.

Narushima couldn't afford to make unnecessary mistakes.

His movement had to be purposeful.

His attacks had to be efficient.

And his timing had to be exceptional.

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Technique Can Overcome Size... Sometimes

The story of Ryu Narushima does not mean that size never matters.

It absolutely does.

A significant weight difference creates real physical advantages.

But martial arts have always been about finding ways to maximize what you have.

A smaller fighter may have better speed.

Better mobility.

Better endurance.

And the ability to attack from angles that a larger opponent doesn't expect.

Narushima became a remarkable example of how those advantages can be developed into an effective fighting system.

He didn't eliminate the size difference.

He learned how to fight around it.

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Why Narushima's Style Was So Unique

Many Kyokushin fighters are known for incredible toughness.

Narushima certainly possessed the conditioning necessary to compete at the highest level.

But his identity was different.

He wasn't just trying to absorb punishment and keep moving forward.

He brought precision.

Speed.

Explosive movement.

And an obsession with decisive techniques.

That combination made him one of the most unusual and exciting fighters to watch.

You never knew when the opening would appear.

But when it did, the fight could change immediately.

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The Nightmare for Giants

Imagine standing across from a fighter who is significantly smaller than you.

You have the reach advantage.

The weight advantage.

The strength advantage.

You expect to control the fight.

Then the bell rings.

The smaller fighter is faster than expected.

His movement is difficult to predict.

Every kick arrives from an unexpected angle.

Every hesitation creates another opening.

And suddenly, one clean technique lands.

That's what made Ryu Narushima such a dangerous opponent.

The giants could see him.

But stopping him was another problem entirely.

---

Final Thoughts

Ryu Narushima's career is one of the most fascinating examples of how martial arts can challenge conventional expectations.

At around 5 feet tall and 141 pounds, he often looked physically outmatched in the brutal world of openweight Kyokushin Karate.

But the moment the fighting began, expectations changed.

His roundhouse kicks were lightning fast.

His punches were explosive.

His timing was exceptional.

And his ability to create decisive Ippon moments earned him a reputation as "The KO Master."

The larger fighters had the size.

Narushima had the speed.

They had the weight advantage.

Narushima had the timing.

And when the smallest opening appeared, technique became more important than the numbers on the scale.

He was too small for Kyokushin.

At least, that's what they thought.

Then he started knocking out giants.

This is the story of Ryu Narushima.

The lightweight Kyokushin fighter who became a nightmare for giants.

 

Everyone Thinks Kung Fu Is Outdated... Until They See This Shaolin Monk Fight

Is Kung Fu Really Obsolete?

For years, traditional Kung Fu has faced the same criticism.

It looks beautiful.

It has an incredible history.

Its demonstrations can be spectacular.

But can it actually work when someone is trying to hit you back?

Modern combat sports have changed the conversation.

MMA, Boxing, Muay Thai, Wrestling and Brazilian Jiu-Jitsu have demonstrated the importance of pressure testing, timing, conditioning and live resistance.

As a result, many people have come to the conclusion that traditional Kung Fu is simply outdated.

But is the answer really that simple?

The truth is more complicated.

Kung Fu is not a single fighting system.

It is an enormous collection of martial arts, training methods, philosophies and fighting traditions developed over centuries.

And while some techniques may be difficult to apply under modern competitive rules, others contain principles that remain extremely relevant.

Distance. Timing. Footwork. Angles. Deception. Interception.

Those principles never became outdated.

Shaolin Kung Fu: More Than A Demonstration

When most people think about Shaolin Kung Fu, they often imagine impossible flexibility, spectacular kicks, acrobatics and choreographed demonstrations.

And those elements certainly exist.

But traditional martial arts training can involve far more than performing techniques for an audience.

A fighter must develop:

• Balance
• Coordination
• Mobility
• Body control
• Speed
• Strength
• Endurance
• Timing
• Distance awareness

The real question isn't whether every traditional movement can be copied directly into an MMA fight.

The question is whether the underlying principles can survive against resistance.

That is where things become interesting.

The Shaolin Monk Who Changes The Conversation

When a highly trained Shaolin practitioner demonstrates effective timing, speed and control against another skilled martial artist, the stereotype begins to collapse.

Suddenly, Kung Fu doesn't look slow.

It doesn't look decorative.

It looks like what martial arts have always been about.

Controlling an opponent before the opponent can control you.

The effectiveness of any system ultimately depends on the practitioner, the training method and the environment in which the skills are tested.

A traditional martial artist who never trains against resistance may struggle.

But a practitioner who combines traditional skills with timing, conditioning and realistic sparring can become a completely different kind of fighter.

Tiger Style: Power And Relentless Pressure

Tiger Style Kung Fu is known for powerful movements and aggressive attacks.

The imagery of the tiger reflects strength, explosive force and the ability to overwhelm an opponent.

Traditional techniques may use claw-like hand positions and dramatic body mechanics, but the deeper concept is about generating force and dominating space.

A fighter who understands pressure can force an opponent into mistakes.

That principle exists everywhere in combat sports.

The techniques may look different.

The principle remains the same.

Crane Style: Timing Over Raw Power

If Tiger Style represents aggression, Crane Style often emphasizes balance, positioning and precision.

The movements can appear lighter and more evasive.

But that doesn't mean they lack purpose.

A smaller fighter cannot always rely on brute force.

They need timing.

They need angles.

They need to understand when to move and when to remain still.

That is one of the reasons traditional martial arts concepts can still be valuable.

Not every fighter wins through power.

Sometimes the most effective movement is the one that places you in the right position before the opponent realizes what happened.

Snake Style: Precision And Unpredictability

Snake Style Kung Fu focuses on speed, precision and unusual lines of attack.

The style's visual identity can look unconventional, but unpredictability itself is a powerful weapon in combat.

Fighters spend countless hours learning how opponents normally attack.

The more predictable you become, the easier you are to read.

Unusual timing and unexpected angles can disrupt that rhythm.

Of course, unusual techniques alone do not guarantee success.

They must be supported by realistic training.

But the ability to create confusion remains valuable in every fighting system.

Wing Chun And The Art Of Interception

Wing Chun is one of the most recognizable Chinese martial arts in the world.

Its philosophy emphasizes direct attacks, close-range control and efficient movement.

One of its most interesting concepts involves occupying the opponent's line and attacking during transitions.

The principle is simple.

Don't wait until the opponent finishes attacking.

Find the moment when their movement creates an opening.

This idea can also be found in Boxing, Karate, fencing and modern MMA.

The terminology changes.

The principle does not.

Kung Fu Vs Modern Combat Sports

This is where the discussion often goes wrong.

People ask:

Which one is better?

But martial arts don't exist in a vacuum.

Rules matter.

Training methods matter.

Weight classes matter.

Experience matters.

And the individual fighter matters more than the name of the system written on the gym wall.

A skilled MMA fighter who trains daily against fully resisting opponents will usually have a significant advantage over someone who has never experienced real pressure.

But that doesn't automatically mean that every traditional technique is useless.

It means that techniques must be tested.

Shaolin Monk Vs Karate Champion

When a Shaolin-trained martial artist faces a skilled Karate practitioner, the most interesting part isn't deciding which tradition has the better history.

It's seeing how different principles interact.

Karate often emphasizes explosive entries, distance and powerful counterattacks.

Shaolin systems may incorporate a broader variety of movements, angles and tactical concepts.

But once resistance begins, both fighters face the same fundamental problems.

Can you control distance?

Can you recognize an attack?

Can you maintain balance?

Can you remain calm under pressure?

And can you apply your technique before the opponent applies theirs?

Flashy Techniques Don't Automatically Mean Ineffective Techniques

One of the biggest misconceptions about Kung Fu is that anything visually impressive must be useless.

That's not necessarily true.

The real problem comes when a technique is performed beautifully but never tested against resistance.

The same criticism could apply to any martial art.

A punch performed perfectly in front of a mirror is not the same as landing that punch against a moving opponent.

A throw demonstrated with a cooperative partner is not the same as executing it against someone actively resisting.

The difference is pressure.

The Importance Of Pressure Testing

Pressure testing changes everything.

It reveals which techniques are difficult to apply.

It exposes weaknesses.

It improves timing.

And it forces a martial artist to adapt.

Traditional martial arts can become more effective when practitioners include controlled sparring and resistance training while maintaining the technical principles that make their systems unique.

The goal isn't necessarily to transform Kung Fu into MMA.

The goal is to understand which skills remain functional when the situation becomes unpredictable.

Kung Fu Was Never Just About One Technique

The greatest mistake is assuming that Kung Fu is a collection of fixed moves that must always be performed exactly as they appear in a form.

Forms can teach coordination, movement patterns and body mechanics.

But fighting requires adaptation.

An opponent doesn't follow the choreography.

They move unpredictably.

They attack.

They defend.

They create problems.

A martial artist must learn how to adapt.

That ability may be the most important skill of all.

Why Traditional Principles Still Matter

Modern combat sports have proven many important things about fighting.

They have demonstrated the value of sparring.

They have revealed the importance of conditioning.

And they have shown what happens when different styles collide under pressure.

But they haven't eliminated the value of traditional martial arts principles.

Timing still matters.

Distance still matters.

Balance still matters.

Angles still matter.

Deception still matters.

And those ideas existed long before modern combat sports.

The Fighter Matters More Than The Label

There is no magical martial art.

A style cannot fight by itself.

The person using it determines whether the training works.

Two people can study the same system for ten years and become completely different fighters.

One may focus entirely on demonstrations.

Another may develop exceptional timing through constant sparring.

The name of the style remains the same.

The result does not.

Final Thoughts

So, is Kung Fu outdated?

Not necessarily.

Some traditional training methods may need adaptation if the goal is modern competitive fighting.

Some techniques may be difficult to apply against a resisting opponent.

And no martial art should be immune from criticism or testing.

But dismissing all of Kung Fu because of its most theatrical demonstrations ignores the enormous depth of the systems behind it.

Shaolin Kung Fu.

Tiger Style.

Crane Style.

Snake Style.

Wing Chun.

Each contains different ideas about movement, timing and combat.

And when those principles are developed through serious training and tested under pressure, traditional martial arts can still surprise people who thought they already knew the answer.

Because sometimes the problem isn't that Kung Fu doesn't work.

Sometimes the problem is that people have only seen it when nobody was fighting back.

Watch closely.

Test everything.

And never underestimate a martial artist simply because their style is older than the sport standing in front of them.

 

The Brutal Training That Turns Female Judokas Into Monsters 🥋 | Inside Elite Judo.

The Brutal Training That Turns Female Judokas Into Monsters

They May Look Calm Outside The Arena...

Outside the competition arena, they may appear calm, elegant, and completely ordinary.

But step onto the Judo mat, and everything changes.

Years of training have transformed elite female Judokas into some of the most physically prepared and technically dangerous athletes in combat sports.

Behind every spectacular throw are thousands of repetitions.

Behind every medal are years of conditioning.

And behind every successful technique is a level of discipline that most people never see.

From Jessica Klimkait and Telma Monteiro to Daria Bilodid and Uta Abe, these athletes have competed against the best Judokas in the world.

They have won major titles.

They have stood on international podiums.

But the medals tell only part of the story.

The rest was forged inside the dojo.

Judo Is More Than Throwing

To someone watching for the first time, Judo might appear simple.

One athlete grabs the other.

A throw happens.

Someone hits the mat.

But behind that single movement is an extraordinary amount of preparation.

Balance.

Grip fighting.

Timing.

Explosive power.

Body positioning.

Reaction speed.

And the ability to remain composed while another elite athlete is trying to throw you with maximum force.

At the highest level, even a small mistake can be enough.

Thousands Of Repetitions

Elite Judokas don't learn a throw once and move on.

They repeat it.

Again.

And again.

And again.

A technique must eventually become instinctive.

There isn't always time to think during a real match.

The athlete has to recognize the opponent's movement and react almost immediately.

That level of automatic response comes from repetition.

A Judoka might spend years refining the same entry, the same grip, or the same throw.

The difference between success and failure can be measured in centimeters.

The Brutality Of Randori

One of the most demanding parts of Judo training is randori.

Unlike simply practicing a technique with a cooperative partner, randori introduces resistance.

Both athletes are moving.

Both are fighting for grips.

Both are attempting to control position.

And both are looking for opportunities to attack.

A single training session can involve repeated explosive exchanges, throws, falls, and constant physical contact.

There is very little opportunity to relax.

The Art Of Falling

Before an athlete can throw someone effectively, they must learn how to fall.

This is one of the foundations of Judo.

Elite competitors are thrown repeatedly throughout their careers.

Learning how to absorb impact safely is essential.

But even with proper technique, the physical demands accumulate.

Training involves constant contact with the tatami.

Repeated impacts.

Constant pulling.

Explosive movements.

And intense physical fatigue.

Grip Fighting Is A Battle Before The Throw

One of the most overlooked aspects of elite Judo is grip fighting.

Before a Judoka can execute a major technique, they often need to establish control.

Who controls the sleeve?

Who controls the lapel?

Who can manipulate the opponent's posture?

The battle for grips can become exhausting.

It requires strength, timing, and strategy.

A dominant grip can create an opportunity for a throw.

A poor grip can leave an athlete vulnerable.

Jessica Klimkait And Explosive Competition

Jessica Klimkait represents the explosive athleticism required at the highest level of modern Judo.

Elite competition demands more than technical knowledge.

The athlete must be able to generate power instantly.

A single opening might only exist for a fraction of a second.

That means strength and speed have to work together.

The best Judokas don't simply react quickly.

They recognize opportunities before less experienced athletes even realize they exist.

Telma Monteiro And Experience

Telma Monteiro represents another crucial element of elite combat sports:

Experience.

Physical ability is essential.

But competition teaches lessons that cannot always be learned during ordinary training.

Elite athletes learn how opponents react under pressure.

They understand tactical situations.

They develop the ability to remain composed during difficult matches.

That experience becomes another weapon.

Daria Bilodid And Technical Precision

Daria Bilodid became known for her technical ability, athletic movement, and exceptional understanding of distance.

Her style demonstrates an important principle of Judo:

Size and brute strength are not everything.

Technique allows an athlete to use timing, leverage, and positioning to overcome physical resistance.

But developing that precision requires years of practice.

The technique may look effortless during competition.

The training behind it is not.

Uta Abe And The Champion's Mindset

Uta Abe represents the mentality required to compete consistently at the highest level.

Elite Judo isn't only a physical challenge.

It is a psychological one.

Athletes must compete under enormous pressure.

They must manage expectations.

They must recover from defeats.

And they must continue improving even after becoming champions.

Winning one tournament doesn't guarantee the next victory.

Every opponent is studying.

Every competitor is improving.

Staying at the top requires constant evolution.

Strength Training For Judo

Modern elite Judokas combine technical practice with intense physical preparation.

Training can include:

• Explosive strength exercises
• Pulling and grip development
• Sprint intervals
• Plyometric movements
• Core conditioning
• Mobility work
• Endurance training
• Olympic-style lifting movements
• Sport-specific drills

The goal isn't simply to become bigger.

It's to become more explosive, resilient, and efficient.

The Importance Of Grip Strength

Judo places enormous demands on the hands and forearms.

An athlete may spend an entire match fighting to establish or break grips.

That constant pulling creates significant fatigue.

Strong grip development allows a Judoka to maintain control while executing techniques.

But grip strength alone isn't enough.

The best athletes know when to use that strength.

Technique determines how effectively it is applied.

Conditioning Beyond Comfort

Elite Judo training frequently pushes athletes beyond their comfort zones.

The body becomes tired.

Breathing becomes difficult.

The arms begin to lose strength.

But the training continues.

Why?

Because competition doesn't stop when an athlete becomes exhausted.

A match can be decided when both competitors are physically depleted.

The athlete who can still think, react, and execute technique under fatigue gains a major advantage.

The Mental Side Of Being Thrown

There is another difficult part of Judo that is rarely discussed.

You have to become comfortable with failure.

During training, an athlete will be thrown.

Repeatedly.

A technique won't work.

A grip will be broken.

A stronger opponent will dominate an exchange.

The athlete has two choices.

Stop.

Or learn.

The best Judokas develop an ability to recover mentally from mistakes almost immediately.

World Champions Are Built In The Dojo

The competition arena is where the world sees the result.

But the transformation happens somewhere else.

Inside the dojo.

During the early morning sessions.

During conditioning when the body wants to stop.

During countless repetitions of the same technique.

During difficult sparring sessions.

That is where champions are created.

Why Female Judo Is So Physically Demanding

Elite female Judokas must combine multiple athletic qualities at the same time.

They need:

Strength.

Speed.

Explosive power.

Balance.

Mobility.

Endurance.

Technical precision.

And perhaps most importantly, they need the ability to remain composed when another world-class athlete is trying to physically dominate them.

There are very few sports that demand such a complete combination.

More Than Medals

A world championship medal represents a moment.

An Olympic medal represents a lifetime of preparation.

But neither shows the full picture.

The bruises.

The exhaustion.

The failed techniques.

The injuries.

The early mornings.

The endless repetitions.

The difficult defeats.

All of those experiences are part of the journey.

Final Thoughts

The world's greatest female Judokas aren't simply born with extraordinary talent.

Talent may open the door.

But training determines how far an athlete can go.

From Jessica Klimkait to Telma Monteiro, Daria Bilodid, and Uta Abe, every elite competitor represents years of sacrifice and relentless discipline.

They may look calm outside the arena.

But inside the dojo, they are forged through one of the most physically demanding training systems in martial arts.

Thousands of throws.

Countless falls.

Relentless conditioning.

Years of discipline.

Because becoming an elite Judoka isn't about looking dangerous.

It's about becoming impossible to ignore once the fight for control begins.

This is the brutal training behind some of the world's most dangerous female Judokas.