Kime: the soul of the karate punch
Introduction In previous articles I have alluded to the very different dynamics of punches from karate (and many other traditional striking arts) as opposed to, say, boxing. Importantly, I’ve said that in karate a premium is placed on not pushing your opponent away, but rather causing maximum damage without shifting him/her much, if at all. In other words, the energy in your punch should not be converted into kinetic (moving) energy, but rather be utilised in a destructive effect. [For more on this topic see my articles “ Visible force vs. applied force ” and “ Hitting harder: physics made easy ”]. Hydrostatic shock The mechanics of that effect are best described as a hydrostatic shock. Your body is mostly water (about 70%), and when you punch with focus a shockwave is created in that medium (think of punching a balloon filled with water). The shock then impacts on the nervous system. Consider a punch to the solar plexus: The "winded" feeling results from the punch target...