COMBAT SPORTS ARE BASED ON THE SKILLS used in fighting .In these sports ,the competitors may be unarmed-as in judo and boxing or armed as in fencing and ken do. Judo is a system of unarmed combat developed in the East.Translated from the Japanese the name means "the gentle way"student learn how to turn an opponent's force to their own advantage..The usual costume is loose white trousers and a jacket fastened with a cloth belt.The colour of the belt indicate the student's level of expertise.,from white belted novices to the expert "black belts".Competitions takes place on a mat or "shiaijo",9 or 10 m(30 or 33 ft)square in size ,bounded by "danger" and " safety" areas to prevent injury. Competitors try to throw ,pin or master their opponent by applying pressure