Jiu jitsu is a physical and mental discipline that provides effective self defence and self development. It is a traditional Japanese martial art that has been tried and tested over many hundreds of years, with a wide variety of techniques which rely on the principles of compliance and flexibility. Today it is found in many self defence and restraint techniques used by police and armed forces the world over, and is the basis of the physical skills taught in most self defence courses. It takes a rational approach to the way the body works and how to make the best use of your size and strength when dealing with an attacker.