Although jeet kune do’s foundation lies in wing chun theory, Bruce Lee liberally borrowed from other kung fu styles: taekwondo, wrestling, fencing and Western boxing.

Building on the precept of self-knowledge through self-discovery, the JKD practitioner is prompted to absorb what ideas are useful and discard those that are not. The physical goal is perpetual development of physical speed, timing, footwork, coordination and power.

Since Bruce Lee’s death in 1973, two variations of jeet kune do have evolved: original JKD, which is promoted as the art Bruce Lee practiced; and JKD concepts, which applies Bruce Lee’s concepts to martial arts techniques drawn from various Indonesian, Philippine and Thai styles.