Center line- every person has a centerline, an imaginary line that runs straight down from the top of your head through the center of your body. This is where many of your targets are or are around. Also this is where your balance is� move a person out of the centerline�i.e. control their spine by off balancing, joint locks and so on�you can control them, throw, strike them or guide them with ease.
Conservation of energy and economy of motion- This is not something that�s easily learned in ground fighting but is very apparent in arts like Aikido, Aiki-jujitsu, Hapkido, Bagua Zhang and more subtly in arts like Wing Chun and Hsing I, Jujitsu, Judo, etc... To always use the attackers force and momentum against them� thus enabling a you to last longer in a fight and increase survivability and using only the amount of energy you need and no more.
Principles of Rotation- Not all techniques can be muscled through or are always effective by themselves. Certain standing grappling techniques, throws and levers are greatly enhanced and the result increased by rotating�i.e. the techniques itself is circular, the foot work is more circular or partially circular�and/or both. Many of these techniques many smaller practitioners would take too as they require little or no strength. examples of arts that use rotations extensively would be Daito-Ryu Aiki-jujitsu (combat proven since 1257) Aikido and Hapkido (which Aiki-jujitsu is the parent art to both) and others.
Leverage- Arts like Jujitsu(lethal and non-lethal ground fighting) and Judo (Judo which came from Jujitsu-the exception being Gracie jujitsu who�s parent art was Kodokan Judo�the reverse happened.) teach a lot in their throws also. And again seen in Bagua, Tai Chi Chuan, Aiki-jujitsu, Aikido, and Hapkido. Proper leverage can prevent the use of too much energy and can make a technique work on a bigger person.
Angles and methods of execution - Should you throw the technique horizontally, vertically, or                      
diagonally? Should it be a thrusting, whipping, snapping, or slicing maneuver?
Coordination - The upper and lower body, right foot/left hand, hand/eye, etc.
Impact- How hard do you hit and what reaction can you expect as a result?
Power principle - How to generate body momentum in the dimensions of height, width, or depth
Timing- When to execute a tecnique in conjuction with the movement of your opponent in the most oppurtune moment
Technique- How to strike, grab, throw, kick, positioning etc.. correctly.
ADDITIONAL MARTIAL ARTS PRINCIPLES
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