This is a quick demonstration as to how the power center works. You are strongest when you are in your power center, shown above. However, when outside of the power center, your strength is greatly reduced.
To test the attackers strength in this choke or grab position: position your arms inside your attackers arms and try to push out. Impossible to do!
As you push through his arms clapse into each other.
Have your attacker hold his arms in position shown, as if he is in a choke position. Push arms from outside – inside. He will not be able to hold off the push inward.
Testing your strength from this position. Have someone put their hand in the small of your lower back, the other on your chess. Try to lean up right. Impossilbe to do.