Vietnamese martial artist became a world champion in 2013 . and I asked to come with him . '' Duong trains six days a week , seven in build up to tournaments . He has won the World Martial Arts Championships three times and is considered one of the best fighters in Vietnam. Duong displays incredible athleticism in routine that uses spears and swords .
Vietnamese martial artist became a world champion in 2013 . Duong trains six days a week , seven in build up to tournaments . He has won the World Martial Arts Championships three times and is considered one of the best fighters in Vietnam. Duong displays incredible athleticism in routine that uses spears and swords .