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Principle of Aiki and its Application in Aikido and Aikijujutsu
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Aiki Age and Sage

Aiki Age Elements

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

Analysis

At a time of 01.37 Uke holds Tori's jo. Tori induces Uke to apply Aiki by lowering his body/jo as he rotates the jo to the front. Lowering the jo causes Uke to resist the downward force by momentarily relaxing his upper body while extending his legs in preparation to pull upwards. The action of Uke extending his legs causes the muscle torque about the foot joints to be in the reverse direction to that required to resist Tori rotating the jo to the front, causing Uke to become unbalanced to the front. Aiki-Lead

Kokyo-ho Aiki Age, Aiki Sage

The application of Aiki in the techniques demonstrated by Yoshihito Shibata is analysed below.

Analysis

At a time of 0.56 Uke holds Tori's wrist. Tori induces Uke to apply Aiki by Tori moving the outer edge of his wrist towards Uke causing Uke to momentarily relax his upper body and apply muscle torque about his knee joints in preparation to push forwards. The action of Uke pushing forwards causes the muscle torque about Uke's knee joints to be in the reverse direction to that required to resist Tori turning his wrist to the inside, causing Uke to become unbalanced to the side. Aiki-Lead

At a time of 1.18 Uke holds Tori's wrist. Tori induces Uke to apply Aiki by Tori moving his wrist towards Uke causing Uke to momentarily relax his upper body and apply muscle torque to his knee joints in preparation to push forwards. The action of Uke pushing forwards causes the muscle torque about his knee joints to be in the reverse direction to that required to resist Tori turning his wrist to the inside, causing Uke to become unbalanced to the side. Aiki-Lead

Aiki Age and Aiki Sage

The application of Aiki in the techniques demonstrated by Yoshihito Shibata is analysed below.

Analysis

At a time of 00.41 both Ukes support a rod held horizontally at arms length. Tori induces Uke to apply Aiki by lowering his arm/body on top of the rod causing both Ukes to momentarily relax their upper body and to prepare their lower body to pull upwards on the rod. The action of Uke pulling upwards cause the muscle torque about the ankle joints to be in the reverse direction to that required to resist being pushed to the rear by Tori moving forwards, causing the Ukes to become unbalanced to the rear. Aiki-Lead

The same analysis applies to the rod being grasped by Tori at a time of 01.24.

Age and Sage Application for Aikido 1, July 7 2012

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

Analysis

At a time of 01.13 Tori rests his arm on Uke's shoulder. Tori induces Uke to apply Aiki by turning his wrist over as he pushes Uke to the rear. Turning the wrist over induces Uke to resist the downward force by momentarily relaxing his upper body while extending his legs in preparation to push upwards. The action of Uke extending his legs causes the muscle torque about the ankle joints to be in the reverse direction to that required to resist Tori pushing him to the rear, causing Uke to become unbalanced to the rear. Aiki-Lead