Striking, momentum and balance

A person standing on the road and a person walking on the road are NOT the same. When a person stands he has balance and stability. When a person walks he walks against gravitational force. Although walking ensures momentum, there is no guarantee of balance ;)

The whiteboard shows a man with proper and improper balance. 

This is the fundamental principle behind centre of gravity, balance, striking an attacker to the ground. Understanding the fundamentals are important when learning self defense.

Cheers!