Quote:
David Skaggs wrote:
The fluid that the body is mostly made up of is not water. It is a non-newtonian fluid that has the properties of both a solid and and a liquid depending of how quickly forces are applied to it. The slower a force is applied the more like a liquid the fluid behaves like. The faster a force is applied to it the more like a solid it acts like. These forces can be external like a poke or a punch or internal.
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And see -- we agree on something as well. The "force" you refer to is actually shear. It is defined as such in regard to this very behavior of such fluids: Non-newtonian fluids such as cornstarch suspensions are called "shear- thickening" and its inverse is called thixotropic or shear-thinning (slightly different, those last two), and an example of that is quicksand, or earthquake liquefaction of the earth.
Tekubifuri and furitama are simple exercises in applying and perceiving whole body cyclic shears at critical higher frequencies to learn this range of behaviors in the body. They are explcitly related to the lower frequency behaviors of funetori or udefuri etc. The latter are exercises in "applied thixotropy." Seriously.
Or, if you prefer, you can call them as O Sensei did -- "The demon snake and the spirit of bees."