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KMID : 1137820120330040194
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의공학회지
2012 Volume.33 No. 4 p.194 ~ p.201
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Effects of Combined Stimulus on Stress Relief
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Lee Dae-Won
Park Ji-Hyung
Eom Si-Nae
Kim Do-Won
Cho Syung-Hyun
Ko Chang-Yong
Kim Han-Sung
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Abstract
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This study was designed to investigate the effect of a combined stimulus which was composed of chiropractic massage and thermotherapy on the relief of mental and physical stress. Fifteen healthy male subjects were treated with three type of stimuli; control (without any stimulus), a single stimulus (only chiropractic) and a combined stimulus. To evaluate the effects of stimuli, visual analogue scale (VAS), trunk extension, electromyogram (EMG) on erector spinae muscle and electrocardiogram (ECG) were measured and analyzed before and after stimuli. In the control group, there were no significant changes in EMG root mean square (RMS) value and low Frequency/high Frequency (LF/HF) ratio (p > 0.05, p > 0.05). However, both stimulus groups showed significant increases in trunk extension and EMG RMS values (p < 0.05, p < 0.05), but significant decreases in LF/HF ratios (p < 0.05). Particularly the decrement rate in LF/HF ratio was significantly higher in the combined stimulus group than that in the single stimulus group (p < 0.05). Also, a significantly lower VAS was recorded after combined stimulus. Our findings indicate that the combined stimulus might not only improve flexibility and strength of muscle, but also active parasympathetic nerve activity. The combined stimulus may thus contribute to relieve the stress and to enhance the muscle function.
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KEYWORD
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Chiropractic, Thermotherapy, Combined stimulus, Stress, Visual Analogue Scale, Electromyogram, Electrocardiogram, Heart Rate Variability
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