Physiological Effects of the Vocalizations in the Six-Word Practice

We have previously reported on physiological effects of the six-word practice. We continue that work with the study in which we show the effects worked on an autonomic sympathetic system by vocalizations. In addition, the influene on the autonomic sympathetic system is checked from the measurements of size of the eye pupil during the relaxed period and the vocalizations. To analyze metabolism while doing the six-word practice, we measure the amount of carbon dioxide in nose exhalation of a subject. We find the amount of CO2 is 4% during the relaxed period, and it increases to 6% during standing posture qigong, and to around 6% even in the six-word practice. Therefore, metabolism is increased during qigong. However, the average exhaled amount of carbon dioxide is low during the six-word practice, showing the six-word practice places a light burden on the human body compared to the standing posture qigong. In addition, the strength in a vocalization is not proportional to blood flow of a capillary around the carotid artery. However, blood flow increases a little bit in a few weak vocalizations showing that the vocalizations must be done under qigong conditions.