 Dominated by the philosophy that the fastest and most economical way to an opponent is a straight line, arts that use linear movement as their focus adopt mostly rigid stances and behaviors, and focus primarily on the speed of advance and retreat to overcome an adversary.The striking arts of Japan and Korea utilize linear form quickly to overwhelm opponents with powerful, focused blows, whereas the Chinese arts primarily respect linear movement as a method of staying in reference to the opponent's centerline, and for its necessary use in trapping, or close-range grappling exchanges (See Chin Na).Linear footwork's direct, sharp movements are natural for most grappling systems, which aim quickly to take an opponent to the floor with as little movement or adjustment as necessary.