According to Sir Isaac Newton, every force has an equal and opposite force. In other words, if someone were to pitch a baseball and you hit the ball, it would have the potential to travel farther than if one threw the ball up and hit it. The other way to use reaction force is to pull in the opposite direction with the hips and other arm when punching, striking or blocking. To maintain proper balance, one should concentrate on the lower diaphragm. This is the center of gravity for the human.
Proper balance is necessary to execute technique properly.
If one is unstable, control and focus are lost. A skilled practitioner of Tae Kwon Do should be able to sustain equilibrium while jumping, flying, turning, or just maintaining a low stance. Proper breath control is important in both offensive and defensive situations. A. Defense - If one is being attacked, it is important to stop exhaling if the attacker's blow should penetrate one's defense. Secondly, the breath should be sharply exhaled whenever a block is performed.