Jeet Kune Do

What is Jeet Kune Do?

Jeet Kune Do (JKD, 截拳道) is the martial philosophy and training approach that Bruce Lee developed in the 1960s. The name is usually translated as “the way of the intercepting fist”.

JKD is not a uniform worldwide curriculum. Schools differ between a historical Jun Fan or Original approach and a Concepts approach that applies Lee’s principles to multiple martial arts. Recurring themes include adaptability, directness, efficiency, and avoiding unnecessary adherence to fixed forms.

Bruce Lee and the development of JKD

Bruce Lee trained in Hong Kong under Ip Man in Wing Chun. After moving to the United States, he expanded his studies to include Western boxing, fencing, wrestling, and other martial arts. He initially taught under the name Jun Fan Gung Fu.

Around the mid-1960s, Lee’s focus shifted from a fixed system to an investigative method that could respond to the uncertainty of a real confrontation. In 1967, he used the name Jeet Kune Do. However, Lee opposed the idea that JKD should become a rigid, closed style.

Lee’s philosophy was influenced by his experiences with fighting and teaching, as well as by ideas from Chan Buddhism, Taoism, and Confucianism, among others. He did not finalize JKD as a single formal examination or organizational system. As a result, later teachers developed different interpretations.

Jun Fan, Original JKD, and JKD Concepts

After Lee’s death in 1973, different approaches emerged to preserve and further develop his legacy. Original JKD and Jun Fan JKD generally place greater emphasis on historically transmitted techniques and training methods. JKD Concepts more often emphasizes continuing Lee’s investigative approach and adapting principles to individual characteristics and complementary disciplines.

The terms are not used consistently by all organizations. Lineage claims, the role of specific students, and the question of which content counts as “original” remain subjects of debate.

Training in JKD

Many JKD curricula train four distances or ranges: kicks, punches, trapping and grappling. The older division into long, medium and short range is still found in some schools. The four-part division is a training model, not a globally established standard.

JKD uses principles such as interception, economy of movement, and simultaneous defense and counteraction. The Five Ways of Attack organize different attack patterns, but are not described here as step-by-step instructions.

The centerline theory, originating in Wing Chun, concerns protecting one's own centerline and influencing the opponent's space and position. Here too, terminology and application vary by school.

Adaptation and economy

The water metaphor is often used to explain JKD's adaptability: practitioners should not cling unnecessarily to a single form. “Absorb what is useful” is therefore interpreted as an invitation to examine things critically, not as an obligation to train everything at once without structure.

Many schools combine technical training with conditioning, pads, heavy-bag work, controlled sparren and partner drills. The content can vary significantly between Jun Fan, Original and Concepts schools.

JKD and MMA

JKD is often cited as an important early precursor to the idea that a fighter should be able to combine multiple ranges and disciplines. This makes it related to part of the philosophy behind modern MMA, but MMA also developed from its own competitive traditions, including vale tudo, wrestling, boxing, judo, Brazilian jiu-jitsu, and kickboxing.

It is therefore more accurate to call JKD an influential hybrid approach than to say that modern MMA directly evolved from JKD or that Lee was its sole founder.

Notable lineages and practitioners

The history of JKD includes figures such as Taky Kimura, James Lee, Dan Inosanto, Ted Wong, Richard Bustillo, Jerry Poteet, Larry Hartsell, and Tim Tackett. Their roles, curricula, and succession claims vary by organization and are not consolidated into a single official worldwide lineage.

Jeet Kune Do in the Netherlands

According to Dutch sources, the Netherlands offers training in both the Jun Fan or Original JKD sphere and the broader JKD Concepts sphere. The Jun Fan Jeet Kune Do Netherlands Foundation lists Dutch schools, instructors, and events; JKD is also described as a discipline by the Dutch Federation of Martial Arts.

Training locations mentioned include Breda, Leiden, The Hague, Amsterdam, and Waalwijk or the Eindhoven region. Examples of providers include the Jun Fan Jeet Kune Do Academy, The Academy, Kung Fu Expert, Jeet Kune Do Amsterdam, and Match Waalwijk. The current status, location, and lineage of a school should be verified directly with the provider.

Dutch Original JKD histories mention James ter Beek and Koos Fockens in connection with training under Ted Wong. Other Dutch practitioners encountered JKD Concepts through seminars by Dan Inosanto and his network. This information is lineage-specific and is not used to declare any one Dutch school of thought the only official one.

Philosophical core

The three often-mentioned qualities of JKD are efficiency, directness and simplicity. The practitioner examines what is useful, takes personal characteristics into account, and avoids movements or traditions that no longer serve a purpose.

This does not mean that JKD is practiced without method, training, or discipline. Well-structured drills, realistic but controlled resistance, and critical evaluation are precisely what make it possible to responsibly develop a personal approach.

Conditioning and Bruce Lee

According to biographical sources, Bruce Lee used isometric exercises, stretching and mobility exercises, deep knee bends, boxing training, and traditional training equipment such as the Wing Chun wooden dummy. This describes his personal preparation and is not a mandatory JKD program.

Conditioning and contact training should be built up gradually. Forearm conditioning, dummy training, and intensive knee or strength training can cause injuries if performed incorrectly.

JKD in film, television, and games

Bruce Lee’s role as Kato in The Green Hornet made movements and ideas associated with JKD visible to a wide audience. Other productions, anime, and video games use JKD as inspiration or reference, but a similar fighting style is not automatically an official JKD classification.

Train safely

JKD training may include punches, kicks, locks, throws, and ground work. Therefore, train with a qualified instructor, appropriate protective equipment, and clear agreements about the level of contact. De-escalation and avoiding violence take priority over any technique; self-defense training does not guarantee safety in a real confrontation.