The Biomechanics of Aiki: How Calm and Gentle Practice Enhances Martial Skill In the early stages of martial arts training, practitioners often rely on strength and speed to compensate for technical inexperience. Yet genuine efficiency arises not from muscular effort, but from how harmoniously the body coordinates movement through the joints and nervous system. The principles of Aiki provide a practical framework for manipulating and controlling an opponent’s body—utilizing structure, relaxation