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http://dx.doi.org/10.15268/ksim.2018.6.2.017

Autonomic Nervous System Changes Associated with Respiratory Cycle and Posture  

Song, Seongin (Dept. of Physical Therapy, Graduate School of Catholic University of Pusan)
Goo, Bongoh (Dept. of Physical Therapy, Catholic University of Pusan)
Publication Information
Journal of The Korean Society of Integrative Medicine / v.6, no.2, 2018 , pp. 17-23 More about this Journal
Abstract
Purpose : The purpose of this study was to investigate whether the respiratory cycle and posture can modulate the autonomic nervous system. Methods : Thirty-two healthy men and women, aged 20-30 years, were enrolled in this study. We conducted 2-second and 6-second respiratory cycle with the subjects in standing, sitting, and supine positions, respectively. Their heart rate variability was measured in each position for both cycle lengths. Results : The low frequency/high frequency (LF/HF) ratio is derived from heart rate variability. In the 2-second respiratory cycles, the LF/HF ratios were highest in standing, sitting, and supine position in descending order. There was a significant difference in heart rate between standing and sitting positions (P<.005). In addition, there was a significant difference in heart rate between standing and supine position (P<.000). In the 6-second respiratory cycles, the LF/HF ratios were again highest in a standing, sitting, and supine position in descending order. However, posture was not found to make a significant difference in this case. Conclusion : Respiratory cycle and posture effectively modulated the autonomic nervous system. Further studies of the clinical application of these results should be conducted.
Keywords
respiratory cycle; position; autonomic nervous system; LF/HF ratio;
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Times Cited By KSCI : 1  (Citation Analysis)
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