Pradal Serey, also known as Kun Khmer is a combat sport and an unarmed martial art from Cambodia. In Khmer language, "pradal" means boxing or fighting and "serey" means free. The sport includes stand up striking and clinch fighting where the goal is to knock the opponent out, to force a technical knockout or win the match by points. It consists of four types of strikes- kicks, punches, elbows and knee strikes. The clinch is used by the athletes to wear down the opponent. The match takes place in a square boxing ring of 6.1 meters.
The sport is governed in Cambodia by the Cambodian Boxing Federation (CBF) established in 1961. Outside of Cambodia, the sport is promoted by four organizations- European Khmer Boxing Federation based in Germany, the Anh Binh Minh Khmer Martial Arts Association (Vietnam), the Fédération des Arts Martiaux Khmers (FAMK), based in France and Kun Khmer Australia.
Pradal Serey is a martial art initially practised by the Khmers, which originated in the Angkor era of south-east Asia. However, during the colonial period, the British considered it as a brutal and uncivilised way of fighting. Hence, they added customised and standard rules to the game, making it a more civilised and controlled sport.
During the 1960s, the Cambodian boxers started promoting inter-martial art matches as an exhibition sport. The world governing body of Pradal Serey, the Cambodian Boxing Federation (CBF), which was initially known as the Cambodian Amateur Boxing Federation (CABF), was established in 1961.