Frank Dux is an American martial artist and fight choreographer. Dux established his own school of Ninjutsu in 1975, called "Dux Ryu Ninjutsu". He was the inspiration for the 1988 film Bloodsport starring Jean-Claude Van Damme.
Frank Dux's unique insights and contributions are considered life-saving among those charged with neutralizing lethal or combative threats: special forces, private high risk security, HRT, SWAT, Special Operations Command, Black Operations, and law enforcement personnel. He is identified as a source contributor to the U.S. Navy Seal Specwar Manual, (K431-0097), and other elite combat force manuals. He has been the Key Note Speaker for FLEOA, NEOA, HIDTA, and he is recognized as a leading expert in the fields of law enforcement and SpecOps.