Dux has written a 1996 autobiography entitled The Secret Man: An American Warrior's Uncensored Story. Dux's story was the inspiration for the 1988 motion picture, Bloodsport, which he choreographed. Jean-Claude Van Damme starred in this motion picture. Dux is also credited as a story co-author for the film The Quest.
In 2012 Sheldon Lettich, co-writer of the film Bloodsport based on Dux's "Kumite" claims, dismissed those claims and others Dux had made as being completely false.
Dux states that he was introduced to and trained in Koga Yamabushi Ninjutsu by Senzo Tanaka. Dux's martial art style, Dux Ryu Ninjitsu, is not a koryu (15th century feudal form of Ninjutsu), but is still claimed to be "based on its Koga Ninja root principles of adaptability and consistent change". Frank Dux taught a technique he calls DUX FASST (Focus-Action-Skill-Strategy-Tactics).
