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KMID : 1035420180060020017
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Journal of The Korean Society of Integrative Medicine
2018 Volume.6 No. 2 p.17 ~ p.23
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Autonomic Nervous System Changes Associated with Respiratory Cycle and Posture
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Song Seong-In
Goo Bong-Oh
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Abstract
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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 were enrolled. We conducted 2-second respiratory cycle and 6-second respiration cycle in standing, sitting and supine position, respectively. The heart rate variability was measured.
Result : The low frequency(LF)/high frequency(HF) ratio was derived from heart rate variability. In 2-second respiratory cycle, the LF/HF ratios were high in standing position, sitting, and supine position in descending order. There was a significant difference between standing and sitting position(p<.005). And there was a significant difference between standing and supine position(p<.000). In 6-second respiratory cycle, the LF/HF ratios were high in standing, sitting, and supine position in descending order. But there were no significant differences by postures.
Conclusion : The respiratory cycle and posture effectively modulated the autonomic nervous system. Further studies for clinical application of this results should be conducted.
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KEYWORD
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respiratory cycle, position, autonomic nerve, LF/HF ratio
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