Bernie Lau

Explosive Techniques of Aikijujutsu Bernie Lau


The application of Aiki in the Aikijujutsu techniques video by Bernie Lau is analysed below. 

Analysis

In the video, at a time of 00.00, Uke attacks with an overhead strike with a knife. Tori steps towards Uke and blocks Uke's arm. Tori induces Uke to apply Aiki by pressing down on Uke's attacking arm whilst pushing it sideways with his other arm. Pressing down on Uke's attacking arm induces him to push upwards.  Consequently, the muscle torque about the foot joint of Uke's front leg, due to him pushing upwards, is then in the opposite direction to that required to balance the contact reaction force, due to Tori pushing Uke's arm to the side. Uke is then unbalanced to the side.

Analysis

In the video, at a time of 01.04, Uke attacks with a strike to the side of Tori's head with a knife. As Uke steps forward with his right leg, Tori steps forward and induces Uke to apply Aiki by applying an upward atemi to Uke's face. The upward atemi induces Uke to straighten his body to minimise the impact of the atemi. Consequently, the muscle torque about Uke's right leg ankle joint, due to him straightening his body, is in the opposite direction to that required to slow his forward momentum. Uke is then unbalanced to the front.

Analysis

In the video, at a time of 01.50, Uke attacks with an overhead strike to Tori's head with a knife. Tori steps forward to block Uke's attacking arm with his right arm. On contact,Tori applies Aiki by reversing the muscular torque about his right shoulder joint so as to rotate the contact point upwards about his shoulder joint. Consequently, Uke is unbalanced to the front by his own attacking force. 

Analysis

In the video, at a time of 04.04, Uke attacks with a hand strike to the side of Tori's head. Tori blocks Uke's attacking arm with his left arm. On contact,Tori applies Aiki by reversing the muscular torque about his rear foot so as to rotate the contact point sideways about his rear foot. Consequently, Uke is unbalanced to the side by his own attacking force. 

Analysis

In the video, at a time of 04.54, Uke attacks by grabbing Tori's neck with both hands. Tori induces Uke to apply Aiki by applying an atemi to Uke's solar plexus. The atemi induces Uke to bend at the waist to minimise the impact of the atemi and causes him to pull with his arms. Consequently, the muscle torque about Uke's waist joint, as he bends forward, is in the opposite direction to that required to balance the contact reaction force due to him pulling Tori. Uke is then unbalanced to the front.