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Principle of Aiki and its Application in Aikido and Aikijujutsu

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Muna Dori

Morihiro Saito Sensei. Muna Dori

The application of Aiki in the technique demonstrated by Morihiro Saito is analysed below.

Analysis

In this video Uke grabs Tori's jacket. Tori steps to the side to push Uke's arm in the same direction. As Tori steps to the side, Uke momentarily relaxes his arm/upper-body to allow him to realign his hips to resist Tori's sideways movement. The upward atemi to the face induces Uke to apply Aiki by reversing the muscle torque about his front foot joint (i.e. rotating it forwards by lifting his heel) in an attempt to move his head upwards to reduce the impact of the atemi. This action unbalances Uke as he pulls back. Aiki-Lead

Daito Ryu Hiden Mokuroku

The application of Aiki in the technique demonstrated is analysed below.

Analysis

In this video at a time of 16.10 Uke approaches from the rear and grabs the front of Tori's jacket. Tori induces Uke to apply Aiki by raising himself up, which momentarily induces Uke relax his upper body so as to follow Tori's upward movement as he prepares to resist the upwards movement with his lower body by bending his legs. Tori unbalances Uke to the front as the muscle torque about Uke's front foot ankle joint is in the opposite direction to resist being pulled forward. Aiki-Lead

Tony Annesi - Aiki Refinements 3

The application of Aiki in the technique demonstrated by Tony Annesi is analysed below.

Analysis

At a time of 0.19 Uke grabs Tori's jacket with his left arm. Tori steps back with his right leg, which induces Uke to relax his left arm and bend forward at the waist to avoid becoming unbalanced. As Uke bends forward, Tori induces Uke to apply Aiki, by bending Uke's relaxed left arm which causes Uke to pull back. By Uke bending at the waist the muscle torque about Uke's waist joint is moving in the reverse direction to that required to resist being pulled forward, causing Uke to become unbalanced to the front. Aiki-Lead