|The Lounge | Champions | The Wire | Schedule | Audio | Arcade | The Top Ten | Historical | Email | Video|
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.com/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 **
Man killed in Cobb wreck was college student, martial arts instructor - Atlanta Journal Constitution
5 Steps to Choosing the Right Martial Art for You
One of the questions I get asked most frequently, in several different variations is about which martial art an individual should study. Generally which martial art, and more importantly which school to choose are fundamental decisions someone should make.
How to Become A Modern-Day Ninja Master
The ninja were a military order in Japan. Most people have seen them in movies and fictional books.
So You Think You Train Hard
"Tokio Hirano (1922-1993) 8th DanThe Man Who Revolutionized Judo"By Jim Chen, M.D .
Choosing a Self Defense / Martial Arts School: A Parents Guide
"Daddy, I want to take Karate!""Mommy, Jimmy on the bus hit me again today"There are many reasons why parents want to sign their children up for Self Defense or Martial Arts classes. Once you have made the decision, now you are faced with many different options and questions.
About four years ago Carl recommended we start using the Bogu during our kumite (sparring practice). This method was developed in Okinawa and then found its way into mainland Japan and eventually to the U.
Interesting Facts on Samurai Sword Manufacture
A samurai's sword is his most sacred and prized possession. Not only did the samurai rely on his sword to defend him, but spiritually the sword held greater significance as the samurai actually believed his soul inhabited the sword.
"Fronting": The dodge to get in close to you. The frontal assault, as opposed to the ambush.
Safety Awareness & Self Defense: Circle of Safety
Safety Awareness & Self Defense is the responsibility of each individual. Knowing your surroundings and being aware of potential dangers is your first step towards self-defense.
Martial Arts Strength Training
According to various sources on the internet, a 1996 article in Iron Man Magazine revealed Bruce Lee's workout. In addition to his cardio and karate workouts, Lee lifted weights three times a week and performed the following routine:clean and presses 2 x 8squats 2 x 12barbell pullovers 2 x 8bench presses 2 x 6good mornings 2 x 8barbell curls 2 x 8Unfortunately, he injured his back doing good mornings, which nearly ruined his career.
Break the Bones
"HONE O ORERU" is a Japanese term that translates literally as "BREAK THE BONES". It is an essential concept of true SHUGYO and a central theme of a true Budo Dojo.
The Shocking Truth About Stun Guns
If you are outside the world of law enforcement, chances are you haven't had much "hands on" work with stun guns. Stun guns are as popular today as they have ever been and with the newer smaller packages like cell phone/stun guns, their popularity continues to grow.
The Economics of Self Defense
The following is a recent email I received; I thought I should respond to the list rather than to the individual because this situation is common:"I'm a 52 year old guy who has been pretty active lifting weights for about 20 years but about a year ago I found myself in a situation where a guy suckered me and I friggin was so intimidated that I walked away with my tail between my legs. Thankfully the only damage was to my ego cause I totally wimped out in front of my buddies who were there.
A Great Question!
It's a question that we went back and forth with for awhile ourselves many moons ago. The "how" and "why" of our conclusions may be of some interest.
Grown Man Quits After 3 Mat Pulls!
A matt pull is the simple act of lying on flat on your stomach, reaching in front of you and pulling your self across the mat. This is one exercise that helps develop your muscles for grappling.
Eight Simple Rules for Saving Your Life
Let's put the non-lethal fantasy to rest.1.
Most people have only been exposed to John Styers work through the book "Cold Steel".It is important to remember that first and foremost this book outlines a BASIC course of close-combat instruction.
Fun Games for Children Training in Martial Arts
Keeping children interested in their Martial Arts training requires an element of fun and games. Traditionalists are usually only concerned with the discipline and structure of their training, but incorporating fun games involving proper techniques will add to the value of training and keep the kids interested.
How to Relax During a Fight
I received a returned video from a well meaning, but severely misguided, former customer. This is a rarity since over the past 2 plus years and hundreds upon hundreds of videos shipped; I can only count 3 returns.
This is our last installment on "defining" the parameters of COMBATIVES.The point, I am sure, will be missed by some but it must be emphasized that this material is historical fact and is accurate in substance and detail.
COMBATIVES A Rose by Any Other Name?....Part 2
The advent of World War One (the war to END all wars) brought warfare into a new and foreboding era of man to man killing and slaughter. Air power, mechanized warfare, chemical warfare and the general widespread use of machine guns changed the face of battle almost completely.
Section Site Map - Submit News - Feedback - Comments - Advertise with Us
Copyright © 2006 Luminati Inc. All rights reserved.