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David Orange wrote:
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There are other approaches to this as well that track the same principles in different terminology. Review this:
Specifically this:
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,;... storing power in the spine refers to an antagonistic relationship deliberately developed in the back. This "storing" of power is similar to the tension buildup in your finger just before you flick something away.
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The mechanical word for what was just described is "shear" -- and when developed as a result of the poised moment in the lower lordosis curvature of the spine, it looks like this:
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"…the ch'i adheres to the back and permeates the spine" is a reference in the T'ai Chi Classics which refers to the storing of power in this manner.
The "storing" can be described as restraining an opening move with a closing move and then releasing it. Hence, the contradictory designation.
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. Opening and closing are ways of looking at the reciprocal rotations of limbs used to create leverage in the use of ordinary strength (curl or press, in the case of arms). In the case of the subject being discussed (however it is termed), the principle is not to use the resulting tension or compression effect of the leverage around the joint to do work, but to fix both ends of the set-up lever, not allowing those rotations but letting the reciprocal moments develop without the movement, and then use the shear, instead, when it is released to drive movement in progressive (vice reciprocal, i.e.- push-pull) rotations of the segments of the body and limbs. It is the motion of cutting with the sword as well, or alternatively, of gathering with the arm.
That is what is described here, in the source cited [
http://www.iay.org.uk/internal-stren...e-1/how-to.htm ]
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Without using any shoulder or arm tension, straighten directly toward your partner... relaxedly straightening into their push.
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This is letting the moments at release propagate through the body in a progressive shear movement -- unfurling, if you will, without using direct leverage. "Windings," I believe, is the term the source uses.
Similarly,
Asagao -- a term I have heard used by some DTR folks -- is another way of describing that progressive shear in either expansion and retraction of structure -- equivalent to the description in the source quoted [
http://www.iay.org.uk/internal-stren...aining-tip.htm ]:
Asagao is the morning glory blossom -- seen here:
http://www.youtube.com/watch?v=yuJfh...eature=related