The Three Centres of Gravity (COG) by Dr John Fung
It doesn't matter what you do, Wing Chun, Tai Chi or Judo; when interacting with an opponent, there are 3 COGs you have to be aware of:
1. Your own COG: Keep your COG centralised and you will never fall over. Be free, but never compromise your COG.
2. Your opponent's COG: take his COG away from his base and he will not be able to balance. Without balance and without base, he will not be able to generate power.
3. The Combined COG; i.e., the COG that appears when you are interacting with your opponent.
Your opponent is not dumb. He is not going to give away his balance. To destroy his balance/structure, you can yank his COG off his base by force. To do this, you will have to be stronger than him, and you risk compromising your COG.
The other way is to manipulate the Combined COG. Because your opponent is interacting with you, the Combined COG behaves as if it is attached to both you and him like a rubber band. Move this Combined COG, and he will be drawn off balance. The more he tries to fight it, the worse it gets.
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