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Principle of Aiki and its Application in Aikido and Aikijujutsu
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Don Angier

Principles of Aiki

The application of Aiki in the techniques demonstrated by Don Angier is analysed below.

Analysis

In the first two techniques, Uke is induced to apply Aiki by Tori lowering his weight as he moves to Uke's side. This action causes Uke to momentarily relax his upper body as he extends his legs to pull upwards.  As Uke relaxes his upper body Tori moves to the side. However, Uke's muscle torque about his ankle joints are in the opposite direction needed to resist the sideways movement. Uke becomes unbalanced to the side as Tori maintains his balance by stepping.

In the third technique, Tori moves to Uke's side which induces Uke to relax his upper body as he re-positions his lower body to resist the sideways movement. As Tori moves to the side, he pushes Uke's right arm upwards to apply a wrist lock to induce Uke to apply Aiki by extending his legs. Uke is then unable to resist the sideways movement by Tori as the muscle torque about his foot joints are in the opposite direction. Consequently, Uke unbalanced to the side.