Vovinam and most developed in Vietnam with more than 60 schools around the world, including Poland, Belgium, Cambodia, Denmark, Germany, the United States, Morocco, Norway, Russia, France, Romania, Switzerland, Sweden, Singapore, Uzbekistan, Thailand, Italy, Australia, India, Iran, Spain, Algeria, Taiwan. The Chief of Vovinam Council now is Nguyễn Văn Chiếu. Vovinam is practiced with and without weapons. It is based on the "principle of between hard and soft". It includes training of the body as well as the mind. It uses force and reaction of the opponent. Vovinam also includes hand, elbow, kicks, escape- and levering techniques. Both attack and defense
Infighting (martial arts) Infighting (martial arts) Infighting is the name given to certain martial art techniques used while in close proximity to the opponent. The Chinese martial art of Wing Chun specializes in infighting. The key points of infighting are the control of the enemy's angle of attack, i.e., to control and limit the ways or angles through which an opponent may find an opening in one's guard to counterattack or get past a block or guard. This is attained by controlling the opponent's attacking limb, transferring momentum and debilitating his stability by forcing his posture/position and shifting his mass on his center