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KMID : 0895820100200040147
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Journal of Oriental Rehabilitation Medicine
2010 Volume.20 No. 4 p.147 ~ p.157
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The Influence of Psychological Stress on Neck Muscles and Heart Rate Variability
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Kwon Ho-Young
Lim Gwang-Mook
Kim Jeong-Hwan
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Abstract
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Objectives :This study is performed to investigate the influence of psychological stress on neck muscles tone and heart rate variability(HRV).
Methods :This study was carried out with the data from stress response index score(SRI), surface electromyography(sEMG) and HRV. First subjects were divided into two group according to the SRI points. Subjects in group A had points of SRI in which lower than 30 points. Subjects in group B had points of SRI in which higher than 30 points. Then we investigated how to difference of the index of sEMG and HRV according to each groups.
Results :In this study, the muscle contraction of both upper trapezius muscle in stress group were higher than non-stress group significantly. Complexity, root mean square of successive differences of R-R intervals(RMSSD), standard deviation difference between adjacent normal to normal intervals(SDSD), high frequency oscillation power(Ln(HF)), normalized HF(Norm HF) in stress group were lower than non-stress group significantly and normalized LF(Norm LF) was higher.
Conclusions :This results show that the stress was associated with neck muscle condition and autonomic nervous system.
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KEYWORD
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Autonomic nervous system, Stress, Muscle, Stress response inventory, Surface electromyography, Heart rate variability, HRV
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