Power Spectral Analysis of R-R Interval Variability during Wujijinggong

This study was designed to evaluate the influence on autonomic nervous activity caused by 'wujijinggong' training which is one kind of health-qigong. The subjects practiced qigong and R-R interval variability was evaluated by power spectral analysis. In the tow test groups, trained and untrained subjects, the power spectra in high frequency band (HF) during qigong decreased significantly, and the ratio of low frequency band to high frequency band (LF/HF) during qigong did not increase. These results suggested neither parasympathetic nor sympathetic nervous systems were activated during qigong.