The Principle of Balance and Unbalance
  Given that throwing your opponent is the purpose of the contest,  Shuai Jiao provides many techniques for
throwing.  The basic principle of unbalancing is to move the center of gravity the body out of alignment with its
support.  When a person is moved and begins to lose balance, he will automatically adjust himself to regain his
balance, usually by pushing or pulling his hands and/or moving his feet.  Most Shuai Jiao skills involve using your
hands to move your opponent to one side, which is to move his center of gravity, then, typically, you use the foot
to set up a trip on the other side to block his adjustment.  This generates opposing forces between the upper part
of the body and the lower part of the body, causing the body to twist and fall.  Some skills can be done very quickly
and suddenly without a foot trip so there is not enough time for the opponent to adjust.  Below pictures show these
basic throwing principles.
  a. Stable balance - the center of gravity is between feet
b. Unstable balance – the center of gravity is in one foot
c. Unbalance – the center of gravity is out of alignment with the feet
d. Adjust balance by pushing the left hand, pulling the right hand, or moving the left foot to the left
e. Throwing principle one, pushing and/or pulling the upper body to the left and set a hand, foot, leg, or hip trip to
block the lower body adjusting to the left
f.  Throwing principle two, a curve force F through the body to generate two parts of force, f1 is horizontal force to
the left to moving the upper body to the left, and f2 is vertical force to press the body down so that make foot
adjustment difficult.

Although this principle is simple, the skills are complex in detail.  Obviously many variations of situations can occur
in real fighting.  Thus you must always know how to dynamically adapt in order to solve the problem and complete
your skill.  Most of the times when you use a skill to throw your opponent, your center of gravity is also moving,
even off of your support point.  This is why is common to see people falling down immediately after throwing their
opponent down.  So the ideal situation is one where, with your action you throw the opponent down, and then use
the reaction force to restore your own balance.
Yin Cheng Gong Fa Association North American Headquarters
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