Movement to an advantageous position requires accurate timing and distance perception. A fighter must be able to perceive the best time to move to an advantageous position in an attack. If he moves too soon, the enemy will anticipate his movement and adjust the attack. If the fighter moves too late, the enemy will strike him. Similarly, the fighter must launch his attack or counterattack at the critical instant when the opponent is the most vulnerable.
Distance is the relative distance between the positions of opponents.
A fighter positions himself where distance is to his advantage. He does this according to the range at which he and his opponent are engaged. Momentum is the tendency of a body in motion to continue in the direction of motion unless acted on by another force. Body mass in motion develops momentum. The greater the body mass or speed of movement, the greater the momentum.