Abstract
Ki Aikido is a Japanese martial art to arm oneself against attack from others, in which respiration techniques play a vital role. Ki Aikido was established by Mr. Koiti Tohei, through examining every movement of Aikido transmitted by Mr. Morihei Ueshiba. The physiological effect was studied by comparing breathing conducted by two examinees, a beginner and a distinguished master of Ki Aikido. Ki in Ki Aikido could be physiologically understood through the respiration especially ECG, EEG, blood pressure. In the case of the beginner, the sympathetic nervous system dominated at Ki respiration. But for the master, the activity of the sympathetic nervous system, was lower at Ki respiration period compared to the activity at the closed eyes and relax period. But the activity at the closed eyes and relaxed period for the master was completed different from the beginner. And for the master, exhalation through the mouth, makes an increase of α wave level and expansion of α wave in his topograph compared to exhalation through the nose.
