title: Effects of Qi-therapy (external Qigong) on cardiac autonomic tone: a randomized placebo controlled study.
abstract: Heart-rate variability (HRV) was compared in 40 subjects receiving external Qi-therapy (QT) or placebo control therapy, in a randomized placebo controlled design experiment. There were significant time, and group x time interactions in heart rate (HR), low frequency (LF), high frequency (HF), and LF/HF. These suggest that QT reduced the HR and increased HRV as indicated by a reduced LF/HF power ratio of HRV. These findings suggest that QT stabilizes the sympathovagal function more than placebo therapy.
authors.affiliation: Center for Integrative Medicine Institute of Medical Science Wonkwang University Iksan, Republic of Korea. integmed@chol.com
authors.forename: Myeong Soo
authors.initials: MS
authors.lastname: Lee
authors.forename: Mo Kyung
authors.initials: MK
authors.lastname: Kim
authors.forename: Yong-Heum
authors.initials: YH
authors.lastname: Lee
mesh_terms: D000328:Adult; D001341:Autonomic Nervous System / Q000502:physiology*; D001945:Breathing Exercises; D003627:Data Interpretation, Statistical; D004562:Electrocardiography; D006321:Heart / Q000294:innervation / Q000502:physiology; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D010809:Physical Fitness / Q000502:physiology* / Q000523:psychology*; D015990:Placebo Effect; D011603:Psychophysiology; D016896:Treatment Outcome