• Korean Journal of Psychosomatic Medicine
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• v.22 no.1
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• pp.3-12
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• 2014

Objectives : We aimed to explore the relationship among fatigue and perceived stress, depressive mood in the working population. We also examined associations with demographic and life style factors and investigated the effect of individual coping skills on these associations. Methods : Fatigue Severity Scale(FSS), Perceived Stress Scale(PSS), Brief Encounter Psychosocial Instrument - Korean version(BEPSI-K), Beck Depression Inventory(BDI), Stress Coping Skill Questionnaire were administered to 621 civil servants. All of above and other demographic factors are self-administered questionnaire survey and this study is cross sectional. Results : Mean FSS score was 3.04 which was lower than 3.22, the severity cut off score. FSS, PSS, BEPSI-K, BDI were all higher in female. Subjects with active coping skills showed relatively low fatigue, perceived stress, depressive mood than those with passive coping skills. Logistic regression analyses indicated that the PSS, BDI, BEPSI-K in working population increase the risk of fatigue and regular exercise lowers the risk. Conclusions : Adults who were afflicted by stress, experienced depressive mood or were physically inactive were at much higher risk of feeling fatigue. Since no other large data sets are available for fatigue, the results from this study could serve a very useful purpose, to furnish a basis for comparison with future research results based on more complete data.

• Journal of Oral Medicine and Pain
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• v.26 no.3
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• pp.261-276
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• 2001

본 연구는 구강안면동통 중에서 빈번히 나타나는 근육성 동통의 주 원인인 저작근의 과활성으로 유발된 근육의 피로 시에 운동단위전위, 압력통각역치, 근전도 power spectrum의 변화 양상과 이들 척도간의 연관성을 조사하기 위해 시행되었다. 두개하악장애의 병력 및 현증이 없고 정상적인 구치부 교합관계를 가진 평균연령 25.8세인 36명의 정상 성인(남자 26명, 여자 10명)을 대상으로 교근과 전측두근의 지속적인 등길이 수축 전후의 압력통각역치 및 운동단위전위를 측정하였고 인내시간까지의 근수축 동안 근전도 power spectrum을 분석하여 다음과 같은 결론을 얻었다. 1. 지속적인 등길이 수축 후 교근과 전측두근의 압력통각역치는 수축 전에 비해 유의하게 감소하였다. 2. 압력통각역치는 수축 전과 수축 후 모두에서 전측두근이 교근보다 유의하게 높게 나타났으며, 전체적으로 남성이 여성보다 높게 나타나는 양상을 보였으나 성별간의 차이는 전측두근의 수축 후 압력통각역치에서만 통계적으로 유의하게 나타났다. 3. 지속적인 등길이 수축말기의 중간주파수는 수축초기에 비하여 유의하게 감소하였고, 전측두근의 수축초기 중간주파수와 수축말기 중간주파수 모두 교근보다 유의하게 높게 나타났다. 4. 교근은 지속적인 등길이 수축 전에 비하여 수축 후의 운동단위전위의 지속시간,진폭, 면적, 상의 4가지 척도에서 유의한 증가를 보였고 전측두근은 진폭을 제외한 나머지 3가지 척도, 즉 지속시간, 면적, 상의 유의한 증가를 보였다. 5. 교근과 전측두근의 지속적인 등길이 수축 전의 압력통각역치와 운동단위전위 척도 사이에는 통계적으로 유의한 상관관계가 없었고 교근에서는 수축 후의 압력통각역치와 운동단위전위의 지속시간, 진폭, 면적, 상 사이에 유의한 상관관계가 존재하였다. 위의 실험결과를 통해 근육피로 검사에 압력통각역치, 근전도 power spectrum 검사 외에 근육수축의 기능적 최소 단위인 운동단위전위의 분석 또한 유용할 수 있고 추후 만성으로 진행된 근막동통환자와 정상 대조군간의 운동단위 수준에서의 비교연구와 근피로에 더욱 민감한 운동단위전위의 다른 척도에 대한 개발과 연구가 필요하다고 사료된다.

• The Journal of the Convergence on Culture Technology
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• v.5 no.3
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• pp.241-249
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• 2019

The purpose of this study was to evaluate the effect of cervical stretching program on neck pain, fatigue and range of motion caused by overuse of smartphone. Methods: We treated stretching program to measure the pain, fatigue, and range of motion of the neck before and after cervical stretching program for experiment group (n=25), control group(n=27) nursing college students using the smartphone. The general characteristics of the subjects and the range of neck pain, fatigue, and cervical range of motion were analyzed using descriptive statistics. The results of the cervical stretching program for neck pain, fatigue, and range of motion of the neck were analyzed using independent t-test. Results: After cervical stretching program, the pain of the neck(t=2.86, p=.006), fatigue(t=5.44, p<.001). flexion(t=-2.10, p=.041), extension(t=-2.84, p=.006), right lateral flexion(t=-2.4, p=.047), left lateral flexion(t=-2.05, p=0.46) and right rotation(t=-4.48, p<.001), left rotation(t=-3.38, p=.001) range of rotation were improved. Conclusion: The results of this study suggest that a cervical stretching program can be used as an effective intervention for health problems in musculoskeletal disorders due to smartphone overuse.

• Journal of Ginseng Research
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• v.32 no.3
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• pp.210-219
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• 2008

The purpose of this study is to examine the effect of red ginseng on the performance of aerobics anaerobics exercise and peripheral central fatigue. For this purpose, we measured $\dot{V}O_2max$, $\dot{V}O_2$ at recovery, anaerobic power, blood lactate, Branched-Chain Amino Acid(BCAA) etc in thirty male subjects. They were divided into three group; EGG: endurance training + red ginseng supplementation group(n=7), EPG: endurance training + placebo supplementation group(n=7), GG: only red ginseng supplementation group(n=10). 6 subjects were excepted because they were intermediate test absence(test at four week : EGG=1, EPG=2; test at eight week : EGG=1). EGG and GG took red ginseng twice a day for total 8weeks. Moreover, EGG and EPG were exercised during 45 minutes, three times a week for 12 weeks. The result of this study are shown as follow: In case of $\dot{V}O_2max$, %$\dot{V}O_2$/$\dot{V}O_2max$ and plasma BCAA concentration, no statistically significant change were found among three groups. But, it was showed that three groups tended to increased slightly in $\dot{V}O_2max$, % $\dot{V}O_2$/$\dot{V}O_2max$ and plasma BCAA concentration. For conclusion, the present data provide a new evidence that ingestion of ergogenic aids contained with red ginseng may improve aerobic exercise performance and central fatigue.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.6 no.1
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• pp.51-58
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• 2012

In this study, the active exercise load control system was developed that monitors patient's muscular condition based on EMG signals and controls the load by biofeedback in real-time. In order to select appropriate muscular parameter for the system, the pre-exercise test was performed to obtain EMG signals from healthy 12 males. Subsequently, the main exercise test was performed to evaluate the active exercise load control system based on IEMG: a selected muscular parameter, on healthy 10 males without musculoskeletal disorder. The accuracy and availability of developed system were confirmed through observing changes between exercise load and IEMG. A correlation was analyzed between the fatigue of muscles and RPE indicating the individual subjective fatigue. As a result, the active exercise load control system that was suggested in this study could be useful to control the initial load-balancing and the amount of exercise appropriate for individual in rehabilitation exercise therapy.

• The Journal of the Convergence on Culture Technology
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• v.5 no.4
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• pp.227-235
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• 2019

The purpose of this study was to investigate the effects of cervical vertebral height and shoulder stabilization on anterior head posture in people with turtle neck. The subjects of this study consisted of normal and healthy people with 30 turtle necks. Subjects were randomly assigned to shoulder stabilization exercise and cervical vertebrae exercise (30 men, 15 men and 15 women, height: $168.67{\pm}6.51$, $22.33{\pm}8.27$, $65.03{\pm}11.98$, and $28.66{\pm}1.91$), In the experimental group, shoulder stabilization exercise and cervical spine exercise were performed for 4 weeks. Deep neck flexor, leavator scapular, upper trapezius, rhomboid, and lower trapezius showed significant differences in shoulder stabilization and cervical vertebrae before and after the experiment. As a result, the CVA value decreased significantly and the muscle activity value increased significantly when exercise and Mckenzie program were applied. These results show that exercise and Mckenzie programs have a positive effect on turtle neck improvement.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.24 no.3
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• pp.337-342
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• 2011

Medical lift column controlling the vertical position while supporting heavy eccentric load should have the high fatigue strength as well as the extremely low structural deflection and vibration in order to maintain the positioning accuracy. The lift column driven by a induction motor is generally in a three-step sliding boom structure and exhibits the time-varying stress distribution according to the up-and-down motion. This study is concerned with the numerical prediction of the fatigue strength of the lift column subject to the time-varying stress caused by the up-and-down motion. The stress variation during a motion cycle is obtained by finite element analysis and the fatigue life is predicted making use of Palmgren-miner's rule and S-N curves. In order to secure the numerical analysis reliability, a 3-D FEM, model in which the detailed lift column structure and the fitting parts are fully considered, is generated and the interfaces between lift column and pads are treated by the contact condition.

• 건강소식
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• v.25 no.9 s.274
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• pp.6-13
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• 2001

운동이 우리에게 주는 이로운 점이 너무나도 많다는 것은, 규칙적인 운동을 해본 사람만이 느낄 수 있다. 운동을 지속적으로 하게 되면 체력증진과 스트레스 해소뿐만 아니라, 자신의 운동능력을 깨달을 수 있으며, 성취감도 맛볼 수 있게 된다. 그 밖에도 운동을 하면 컨디션이 좋아지고 피로회복도 빨라져 직장에서의 작업능률도 오르며 기분도 상쾌해진다. 그렇다면 우리에게 알맞은 운동은 어떻게 하는 것일까? 원칙적으로 자기 몸에 맞는 운동을 찾기 위해서는 의한 검사, 체력검사, 운동부하검사, 체력검사 등을 먼저 받아 봐야 한다. 이러한 검사들을 받은 다음 개인의 병력과 운동능력을 고려하고 연령을 참고하여 능력을 맞는 운동프로그램을 처방받아 운동을 실시하는 것이 안전하다.

• Proceedings of the KAIS Fall Conference
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• 2011.12a
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• pp.181-184
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• 2011

본 연구는 국내 성인들의 만성 피로증상과 건강행태와의 관련요인을 파악하기 위해 시도하였다. 자료수집은 2011년 6월 8일부터 2011년 7월 13일까지 서울에 소재한 종합병원 내과에 내원한 환자군 37명, 대조군 111명을 대상으로 설문 및 면접조사를 하였다. 연구결과는 첫째, 운동여부는 정기적으로 운동하는 경우 남성환자군은 26.7%로 대조군의 42.2%보다 낮았으며 여성환자군도 22.7%로 대조군의 31.8%보다 낮은 분포를 보였다. 둘째, 남성의 경우 사회적요인은 45.18배의 위험비를 보였으며 유의한 것으로 나타났다. 여성의 경우 신체적 요인은 237.1배, 가정적 요인은 140.6배의 위험비를 보였으며 유의하였다. 이러한 결과를 토대로 만성피로를 예방하기 위해서는 규칙적인 생활, 건전한 생활리듬을 유지하며 취미생활등을 통해 심신의 만성피로 스트레스를 해소하는 것이 중요할 것으로 본다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.33 no.5
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• pp.839-846
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• 2004

The purpose of this study was to investigate the possibility of medicinal plants application as an edible functional food resource. This research was planned to apply Artesmisia capillaris, which is one of the most widely used oriental medicinal resource into beverages, and to evaluate the validity and the nutrients of the developed beverage with Artemisia capillaris. Following this plan, we analyzed contents of the general nutritional composition, mineral and amino acid contents. And to evaluate the improvement of blood circulation and the ability to recover from fatigue, we had a group of athletes to regularly take the beverage before and after exercise and checked the heart rates, and blood components before exercise and after exercise. Brix, pH and titratable acidity of develoued drink were 9.2%, 4.4 and 0.04%, respectively. The approximate nutritional composition of beverage was carbohydrate, 2.70%, crude protein, 6.00%, crude ash, 0.20%, and crude fat, 0.10%. And developed beverage contained essential amono acids and minerals (p, Ca, K, Na, Fe, Mn, Zn). Heart rates, lactic acid, glucose, creatinine, LDH, GOT, GPT and lipid concentratios in blood were decreased after taking the beverage with Artemisia capillaris for 6 weeks, both in stable condition and after exercise. Since the athletes who participated In our research were doing aerobic exercise regularly, we judged that this result was formed not only by aerobic exercise, but also by the function of developed beverage with Artemisia capillaris the athletes took for 6 weeks. We believe that taking the beverage regularly will help the improvement of the public health and the athleticism of the athletes. We hope that this result will be used as the basic resource in developing of the beverage with Artemisia capillaris in the near future.