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.
與敵交手，有三個重心，你必須知道的： 1. 你自己的重心：保持你的重心中定，你將永遠不會翻倒。保持靈活，但絕不可以敗勢。 2. 你對手的重心：把他的重心引出，使他失去平衡。沒有平衡，他將無法發力。 3. 綜合重心;也就是說，當你與你的對手交流互出現的重心。 你的對手不是傻的，他不會自願放棄自己的平衡。要破壞他的平衡/結構，你可以用勁把他的重心推出。但要這樣把他打出，你必須比他強。而你自己也會失中。 另一種方法，就是靠操縱這綜合重心。當對手與你互動，綜合重心就好像有橡皮筋一般把你和他的重心連著。這綜合重心操縱得好，你就可以無聲無形地把對手的重心帶走。他越想反抗，破壞力就愈大。
Article By Dr John Fung