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
Sambo (martial art) out of then five) from judo's founder, Kano Jigoro. Spiridonov's background involved indigenous martial arts from various Soviet regions as well as an interest in Japanese jujutsu (though he never formally trained it). His reliance on movement over strength was in part because during World War I he received a bayonet wound which left his left arm lame. Both Oschepkov and Spiridonov independently hoped that Soviet military hand-to-hand combat techniques could be improved with an infusion of the techniques distilled from other foreign martial arts. Contrary to common lore, Oschepkov and Spiridonov did not cooperate on the development of their