Learning the Modern Dynamics of Judo

You may have the erroneous idea that force is not necessary in judo, especially when you see a sixty-year-old instructor throwing many young- and strong men seemingly without effort. Dynamics, however, denies this illusion. A body begins to move only when an external force works on it, as will be explained later. A human body is a physical entity. Therefore, if you want to break your opponent's posture and make him fall down or hold him down on the mat;, you must apply the proper force to him.

Newton's "three laws of motion" can be considered the foundation of modern dynamics. As a human body is a physical solid, its motion must be studied under these laws. Therefore a complete understanding of these law.-; may- well be the first step toward learning- the dynamics of judo.

First law of motion

What is force? A conception of it can be derived from the first law of motion. Newton states that a body at rest remains eternally at rest, and a body in motion remains eternally in uniform motion unless acted upon by an external force. When we push a book that rests upon a desk or stop a ball in motion with our hands, we receive resistance from these objects. This resistance is called inertia. Therefore, to give motion to a body at rest or to stop a body in motion, we must overcome the inertia of that body. We may define force as an action to overcome the inertia of a body.

According to the first law of motion, a rolling ball would continue eternally in motion after it had once been put in motion. Therefore, if we were to throw a ball at the moon, the ball would continue its flight until it reached the moon. In reality the ball eventually falls to earth. The reason for this is that the attraction of the earth's gravity acts on all objects in the same manner. How can we apply this law to judo? We know that if an opponent at rest makes a motion it is the result of an external force-that is, of something already independent and separated from his will-even if originally produced by his own will. Therefore you can exploit the force of your opponent if you have a good understanding of the nature of force.

For instance, assume that your opponent moves to his left with the object of making you lean to your right front corner. Suppose that the force with which he moves is equal to five units and that you can throw him in the same direction by adding a force of five units to his five. Then the total force of ten units will throw him easily, even if he tries to resist. To keep from being thrown, he must exert additional force against the force of ten units that is being placed on his body. We know that there is a force that can be exploited whenever the opponent makes a motion.

Second law of motion

Newton states in the second law of motion that when a force acts on a mass, the mass acquires a certain acceleration proportional to, and in the direction of, the force acting on it and that the acceleration is inverse to the magnitude of the mass. The law can be easily understood by means of the following experiment.

Suppose that there are two balls placed on the floor. One is made of iron and the other of wood. Now let us roll the balls simultaneously by applying two forces equal in magnitude and direction. The wooden ball goes farther than the iron ball because its velocity is greater. Try the experiment again, this time exerting a larger force than before. The wooden ball will roll proportionately farther and faster.

Now let us see how this law works in judo. You know that if you exert a force on your opponent and that if his body weight is less than yours, you will be able to make him move or fall with comparative ease. On the other hand, if he is heavier than you, you will have more difficulty in moving him and breaking his posture.

If you throw him with a larger force, he will fall faster to the mat. If he strikes his body against yours to push you down backward, the larger his body, the more difficult it becomes for you to stop his body's movement before he applies his throw.

These phenomena are all due to the second law of motion. It is this law that shows us why a large man has an advantage over a small man in competition.

Third law of motion

The third law of motion is called the law of reaction. The law states that to every motion there is a reaction. We find numerous examples of this in our daily experience. If a man in a rowboat pushes another rowboat, the pushed boat moves in the direction of the force applied, while the pushing boat simultaneously makes a corresponding motion in the reverse direction.

Again, if a man in a boat pushes the shore with a pole, his boat gets clear of the shore. If a person standing in a natural posture before a pillar pushes it with his hand, he will tend to fall backward. This is due to the force of reaction that the pillar exerts against his force.

The third law of motion-the law of reaction-proves that a dynamically produced force is more important than the force of the muscles in breaking the posture of the opponent and making him fall as the result of a fast and powerful movement of your body.

In grappling, why is it difficult for your opponent to get up when he is turned over on his back? It is because he has nothing to push against effectively with either of his feet. Consequently, he can use only the force of his arms and shoulders, but this is not enough to make all parts of his body cooperate.

Visit: If you are beginner interested to know more about Judo, visit http://www.realniches.co m/archives/2005/06/introduction-to-judo.html

To learn more about all the secrets & tips realted to Judo, pls visit http://www.realniches.com/archives/category /judo/

** Attention Webmasters / Website Owners **
You can reprint this article on your website as long as you do not modify any of the content, and include our resource box as listed above with all links intact and hyperlinked properly.

---

Why Every Cop Should Study Judo Part 1

Up until 30 years ago, JUDO was the martial art.... Read More

Bogu Training

About four years ago Carl recommended we start using the... Read More

A Few Things Everyone Should Know to Keep Themselves Safe

The following are a few thoughts about how to decrease... Read More

Fairbairn on the Fairbairn Method

Something for our shooting "enthusiasts" -PRELIMINARY STATEMENTBackground:"Prior to my association... Read More

John Styers

Most people have only been exposed to John Styers work... Read More

The Plight of Industrialized Man

Living in the Pacific Northwest is a challenge for any... Read More

Things to Know About Learning Tai Chi Chuan (Tai Chi Boxing)

For Easterners, particularly Chinese, this MAY not be an issue.... Read More

Samurai Swords ? Choosing a Sword to Buy

It's undeniable that a well placed and mounted samurai sword... Read More

Choosing a Self Defense / Martial Arts School: A Parents Guide

"Daddy, I want to take Karate!""Mommy, Jimmy on the bus... Read More

The Dojo

Just as an aside. For those who would "box" us... Read More

Learning the Modern Dynamics of Judo

You may have the erroneous idea that force is not... Read More

Expect the Unexpected Grass Hopper

The Myth perpetuated by Self Defense Oriented Martial ArtsI just... Read More

How to Become A Modern-Day Ninja Master

The ninja were a military order in Japan. Most people... Read More

Samurai Swords and The Swordsmiths

Back in the early times of sword manufacture, the production... Read More

Im Soooo Confused...

I was going to write about the BASICS of "practical... Read More

A Samurais Power Is In His Little Finger, Not His Samurai Sword

In the 12th Century the Shogunate was formed. The head... Read More

Basic Drills

We all have a good foundation in the basic blows... Read More

What Can We Learn From What Has Already Been Done?

Pre-WWII Judo was a far different thing than what we... Read More

Elements of Unarmed Combat

Custom build your own personal "system":Useful areas of training and... Read More

Interesting Facts on Samurai Sword Manufacture

A samurai's sword is his most sacred and prized possession.... Read More

COMBATIVES? ...... Don?t Tell Me. I Know What That Is! (Part 1)

"Combatives" from the root word COMBAT ? "to fight in... Read More

Generating More Power from Hip Rotation - Lessons from Martial Arts

One of the important lessons of Martial Arts training is... Read More

Benefits of Martial Arts Training For Kids

Admit it. When the going gets tough at home, we've... Read More

Women in the Martial Arts

1st Lady Assistant to Sensei Henry Ellis Ellis Schools... Read More

Samurai - The Honourable & The Treacherous

The Japanese Samurai were warriors. Highly trained, skilled and efficient... Read More

Tai-Chi for the Masses--and Others

Kuang Ping was the T'ai-chi set favored by Yang Lu-Chan,... Read More

By-Rote Combinations

Do not believe that practicing "by rote" 1-2-3,etc. type "responses"... Read More

A Great Question!

It's a question that we went back and forth with... Read More

Aikido Philosophy: An Oriental Concept of Energy, Self, and Mind

PrefaceThere are many different ways to understand Aikido philosophy and... Read More

Is Aikido a Martial Art ?

Sensei Henry Ellis Co-Author of the new book Positive Aikido.-... Read More

COMBATIVES A Rose by Any Other Name?....Part 2

The advent of World War One (the war to END... Read More

Dermot Michael (Pat) ONeill

Dermot O'Neill was born in 1905 in County Cork, Ireland.... Read More

Historical References to W.E. Fairbairn, E.A. Sykes AND Dermot Pat ONeill

FROM THE BOOK: "PIERCING THE REICH" AUTHOR: JOSEPH E. PERSICOThey... Read More