Author - Frank Dux

Frank DuxFrank William Dux (born 1956) is a martial artist and fight choreographer. Dux established his own school of ninjutsu in 1975, called "Dux Ryu Ninjutsu". An article about his exploits, which appeared in Black Belt in 1980, was the eventual inspiration for the 1988 film Bloodsport starring Jean-Claude Van Damme.