• Journal of Korean Biological Nursing Science
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• 제14권4호
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• pp.249-257
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• 2012

Purpose: The purpose of this study was to examine the effects of phytoncide aromatherapy on stress, symptoms of stress and heart rate variability among nursing students. Methods: This study is a randomized control-group non-synchronized design. The experimental group (n=31) underwent phytoncide aromatherapy for 2 weeks, while the control group (n=31) received placebo therapy. The data were collected using self-administration questionnaires and measurement of heart rate variability (HRV) and analyzed using SPSS WIN 18.0 program. A p value <.05 was considered statistically significant. Results: Total score of stress, individual score of intrapersonal stress, and score of peripheral manifestations in symptoms of stress in the experimental group were significantly lower than those of the control group. All indices of HRV were significantly different between the two groups. LF norm and LF/HF ratio in the experimental group were significantly lower than those of the control group, and HF norm in the experimental group was significantly higher than that of in the control group. Conclusion: Based on these results, it can be suggested that phytoncide aromatherapy was effective in decreasing stress and peripheral manifestations of stress and changing in HRV among nursing students.

• 대한한방부인과학회지
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• 제23권2호
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• pp.124-130
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• 2010

Purpose: The aim of the study was to investigate menstrual cycle phase differences in Heart Rate Variability(HRV) in dysmenorrhea patients. Methods: 16 dysmenorrhea patients were enrolled. The severity of dysmenorrhea was measured by Visual Analog Scale(VAS). Recordings for HRV analysis were obtained during the two phases of the menstrual cycle (follicular phase 4~10 days and luteal phase 18~23 days from the start of bleeding). Results: No measure of HRV was significantly different between two menstrual cycle phases. Conclusion: We concluded that menstrual cycle was not significantly associated with changes in autonomic nervous system as measured by HRV in dysmenorrhea patients.

• 전기학회논문지
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• 제64권8호
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• pp.1246-1250
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• 2015

The purpose of this paper is to investigate the autonomic nervous system activity in various ambient temperature situation. To evaluate autonomic function, we use the time domain analysis of heart rate variability. Electrocardiogram was recorded to derive heart rate variability in 3 different temperature room which temperature is controlled in 18℃(low), 25℃ (mid) and 38℃(high), respectively. Totally 22 subjects were participated in the experiment. The result shows that the time-domain variables such as AVNN, SDNN, SDSD, RMSSD, NN50, pNN50, NN20 and pNN20 show the significant difference between low and high temperature (p<0.01). However, these variables has no significance (p>0.05) between mid and high except on AVNN, RMSSD and pNN20. AVNN, RMSSD shows the highest significance (p<0.001) according to the various temperature environment.

• Perspectives in Nursing Science
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• 제9권1호
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• pp.36-44
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• 2012

Purpose: The aim of this study was to examine the effects of a yoga program on perceived stress, stress response and heart rate variability in professionals. Methods: The research design was a quasi-experimental intervention study. The participants were 47 adults with professional jobs consisting of an experimental group with 23 adults and a control group with 24 adults. The duration of the yoga program was eight weeks from July 4 to August 30, 2012. Results: There were significant decreases in the stress response score after the yoga program. No significant changes in perceived stress and heart rate variability were observed between the experimental group and control group. However, there were significant decreases in perceived stress, stress response scale, and heart rate variability for some participants whose stress levels were high. Conclusion: An eight-week-long yoga program could be considered as an intervention to decrease the stress response of professionals even though it might not reduce their perceived stress and heart rate variability. To further analyze the effects of a yoga program in professionals, changes in intervention strength (such as longer periods and frequency) and the development of physiological measures, which would show the co-relationship between perceived stress and physiological response, are necessary in future studies.

• 조명전기설비학회논문지
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• 제30권3호
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• pp.9-20
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• 2016

This study compared the effect of green light consequent on maximum brightness 85 lx and intial brightness 15 lx, and its accompanying psychological, physiological response. 1) As a result of psychology(general stress evaluation, Symptom Checklist-90-Revision) evaluation, all stress evaluation items mostly showed a decrease, and they are comparatively positively evaluated in minimum brightness 15 lx comparing to maximum brightness 85 lx. 2) Physiological (Heart Rate Variability) evaluation result was included in stable range in all cardiovascular system variables after light stimulus in time of comparison with the standard range; in addition, the Heart Rate Variability evaluation result was found to be stable in all cardiovascular system variables except Low Frequency in minimum brightness 15 lx comparing to maximum brightness 85 lx. 3) Green light was found not to appear as a stimulating factor in the human body in time of space projection, being found to be effective in stability of mind and body, and reduction in stress. Thus, it was found that green light functioned as an emotional, relaxing tranquilizer by working on the sympathetic nervous system.

• 한국의류산업학회지
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• 제5권3호
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• pp.295-298
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• 2003

The study investigated the effect of multi-functional fabric on the autonomic nervous function and psychological variables of 20 students. The experimental group exhibited lower values in anxiety, depression, fatigue and stress level and higher emotional level. This study reveals that multi-functional fabrics reduced the low frequency/high frequency power ratio of heart rate variability. These results support the multi-functional fabrics increases cardiac parasympathetic tone. In addition, experimental group were found to have lower heart rate compared with controls. This augmented heart rate in experiment provides support for stablizing autonomic nervous system. In conclusion, multi-functional fabrics may stabilize the autonomic nervous system and psychological symptoms.

• 한국정밀공학회지
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• 제27권6호
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• pp.75-81
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• 2010

The purpose of this study was to investigate the short-term effects of electrical massager on stress-related parameters including heart rate variability (HRV), heart rate (HR) using the photoplethysmogram (PPG) signal with motion artifact correction. Twenty healthy subjects were randomly allocated to receive a 15-min section of three types ((1) resting mode (control group), (2) light massage mode, (3) strong massage mode). Results indicated that self-report, VAS (Visual Analog Scale) significantly decreased for two massage modes after massage except control group. In strong massage mode, it was associated with significant increases in HF, but significant decreases in LF and LH/HF ratio compared with the light massage mode. For all outcomes, similar changes were not observed in the control group. Also, the result founded that mean HR of all groups decrease. We conclude that electrical massager reduces perceived stress and improves adaptive autonomic response to stress in healthy adults.

• Journal of Acupuncture Research
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• 제23권3호
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• pp.155-163
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• 2006

Objectives : This study was designed to evaluated the effect of electro acupuncture on Heart Rate Variability of Patients with functional voiding disease. Methods: Subjects were voluntarily recruited by newspapers and internet. Electro acupuncture was performed three times a week for 3 weeks. Acupuncture point for EA group was B32, Electrical stimulation frequency was 2Hz, duration 20min, and intensity was up to pain threshold according to patients. The patients' Heart Rate Variability was measured before, after 3 weeks of treatment for 5 minutes. Results : In time domain analysis, There were significant increase of SDNN and RMSSD(p<0.05) after 3 weeks treatment. In frequency domain analysis, There were significant increase of LF and LF /HF ratio(p<0.05) after 3 weeks treatment. There were no significant changes in other components of heart rate variability. Conclusion : This study suggests that electroacupuncture treatments can be applicable to improve autonomic nervous system in patients with functional voiding disease.

• 대한한의진단학회지
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• 제15권3호
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• pp.245-260
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• 2011

Objectives: The aim of this experiment is to know the effect of Mountain Cultivated Ginseng Pharmacopuncture on Heart Rate Variability (HRV), Pulse wave velocity (PWV) in Middle Aged Women. Methods: We investigated on 40 women of breast cancer patients. First, we measured their Heart Rate Variability(HRV), Pulse wave velocity (PWV) and then Mountain Cultivated Ginseng Pharmacopuncture $20m{\ell}$ were injected on them. After 30 minutes, we measured Heart Rate Variability(HRV), Pulse wave velocity(PWV) again. As a result, method of non-equivalent control group non-synchronized design were used for evaluation. Results: In HRV, Mean HRV is significantly decreased from 69.15 to 63.34 after injection. Mean RR is significantly increased from 877.20 to 962.10 after injection. SDNN is significantly increased from 32.56 to 41.34 after injection. PNN50 is significantly decreased after injection. RNSSD, SDSD, TP, VLF is significantly increased after injection. Stress Resistance ability is significantly increased from 37.55 to 44.60 after injection. And In PWV, E-R, E-L, H-R, H-L is significantly decreased after injection. Conclusions: Effect of Mountain Cultivated Ginseng Pharmacopuncture on Heart Rate Variability (HRV) increased adaptability of autonomic nervous system and on Pulse wave velocity (PWV) decreased arterial stiffness.

• 한국산학기술학회논문지
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• 제15권9호
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• pp.5578-5584
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• 2014

본 연구에서는 혈액투석환자와 같은 만성질환자 대한 운동수행율을 높이기 위해서 접근성과 동기유발이 용이하고 환자들의 자발적 참여에 효과가 있다고 알려진 가상현실 운동프로그램을 적용하여 그 효과를 확인하고자 하였다. 지역 인공신장실에서 혈액 투석을 받는 환자 46명을 대상으로 대조군과 운동군에 각 23명씩 배정하였다. 가상현실 운동프로그램을 위한 기기로는 닌텐도 위 발란스 보드(Wii Balance Board)를 사용하였다. 투석 전 대기시간을 이용하여 40분간, 주 3회씩, 8주 동안 운동군에게 가상현실 운동프로그램을 시행하였고. 실험처치의 효과는 심박변이도와 삶의 질(SF-36)로 평가하였다. 8주간의 가상현실 운동프로그램 적용 후 운동군에서 심박변이도는 SDNN이 유의하게 상승하였고(p<.001) 삶의 질 점수는 신체적 요소에서 유의하게 상승하였고(p=.003) 정신적 요소에서 유의하게 상승하였다(p=.001). 이상의 결과로 가상현실 운동프로그램은 혈액투석환자의 심박변이도 및 삶의 질 개선에 효과가 있는 것으로 나타났다. 이는 자기주도 VREP가 간호중재의 새로운 시도로서 혈액투석환자뿐만 아니라 다양한 만성질환자의 신체적, 정서적인 효과를 기대하는 간호중재로 활용할 수 있을 것으로 기대한다.