Though rules have been adopted, there is no general sanctioning body for the sport, and the sets of rules vary according to the laws of individual organizations and localities. It was thought that Olympic recognition would be forthcoming for the 2004 Summer Olympics, held in Athens, under the banner of pankration. However, the International Olympic Committee was unconvinced that Greece could handle the total number of sports proposed. To placate the IOC, the organizers removed all new medal sports and pankration was excluded.

The techniques utilized in mixed martial arts competition generally fall into two categories: striking techniques (such as kicks, knees and punches) and grappling techniques (such as clinch holds, pinning holds, submission holds, sweeps, takedowns and throws). Some unarmed hand to hand combat techniques are considered illegal in most or all modern competition, such as biting, eye-gouging, fish-hooking and small joint manipulation. Over the last ten years, strikes to the groin have become illegal in all sanctioned organizations. The legality of other techniques such as elbows, headbutts and spinal locks vary according to competition or organization.

A victory in a bout is normally gained by the judges’ decision after an allotted amount of time has elapsed, a stoppage by the referee or the fight doctor (in the event that the competitor is injured or can no longer defend himself intelligently), a submission, by a competitor’s cornerman throwing in the towel, or by knockout.