Note that this page is not attempting to defend the "sine wave motion" from disbelievers; I'm merely explaining what it is, what its origins are, and what physio-kinetic principles it is based on. In other words, I am not trying to be the Defender of the Sine Wave Motion, but rather an Expositor of the Sine Wave Motion--an "explainer". I don't see myself busy with ITF apologetics, but with ITF exposition; not with persuading, but explaining. Hopefully with understanding will come appreciation.
The Sine Wave Motion's Contextual Origins
ITF Taekwon-Do has roots in both Japan and Korea. One can think of this in relation to Shotokan Karate and Taekkyeon. The impetus for the "unique" sine wave motion has to be understood from a Korean root. Even though Taekwon-Do is largely based on Karate, what makes it a uniquely different martial art, is its Korean kinaesthetics . Part of this kineasthetics is the traditional Korean three-beat rhythm that is prominent in Taeykkyeon and also discernable in Taekwon-Do. Any discussion about the evolution and inclusion of sine wave motion in ITF Taekwon-Do that does not Korean body culture into account is incomplete. This implies that evaluating the validity of the sine wave motion from a purely hard style, Karatesque paradigm is inherently flawed. It can be argued that the Korean kinaesthetics as seen in the sine wave motion is a manifestation of the greater traditional Korean philosophy and cosmology; in other words, the sine wave motion is congruent with traditional Korean philosophy.
Also, it is worth while to remember that Taekwon-Do was one of the first mixed martial arts of the 20th century and had several influences in its early development.
The Basics: Sine Wave and Motion
Sine Wave's Function to Direct Body Mass in the Direction of the Technique
The Sine Wave Motion's Relationship with the Wave Principle and the Circle Principle
If you truly grasp the implications of the animation below, then you will understand everything there is to know about how this Wave / Circle Principle applies to any / every technique in ITF Taekwon-Do.
"[Sine] Wave Motion" in Other Martial Arts / Sports
The Wave / Circle Principle is hardly unique to ITF Taekwon-Do and can be found in many other martial arts as well, most noticeably in the so-called "soft styles". One can also observe it in non-martial art physical activities.
Important Outside Sources
- "ITF Taekwon-Do and Sine Wave as 'Sequential Motion'" [PDF] by International Instructor Manuel Adrogué is a MUST READ article on the topic.