• 한국안전학회지
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• 제21권6호
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• pp.106-115
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• 2006

The purpose of this study is to provide basic data for continuing study in order to accomplish preventive countermeasures for work-related musculoskeletal disorders(WMSD) and to examine related factors in connection with each other as: the working environment, the equipment used, working method, pain symptoms of dentists. The investigation period for this study was from November 1, 2004 to February 28, 2005, and we analyzed questionnaire survey of 190 dentists who were giving medical treatment in and around the metropolitan area and Daegu City. Also, we visited 20 dental hospitals personally and examined the work posture through check lists, interviews, and field investigations on work posture using photos and videotaping. This study showed the increasing physical burdens which were related to dentists work accomplishment and attitude, recognizing pain which were affecting work related WMSD. With the access of ergonomics and improving the education and training of awkward medical treatment methods and posture, and continuous public information about WMSD, the occurrence rate of WMSD could be decreased.

• 대한안전경영과학회지
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• 제15권2호
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• pp.113-120
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• 2013

This study was conducted to investigate the characteristics of smartphone usage and posture of users during using smartphone. A survey was conducted for 983 smartphone users to understand the association between smartphone usage and including subjective symptoms associated with musculoskeletal disorders. Main results from the survey were as follows; 1) 18.8% of the subjects experienced musculoskeletal symptoms at least at one of body parts. Specifically, 8.1%, 5.6%, 4.1%, and 11.3% of the subjects experienced musculoskeletal symptoms at neck, shoulder, elbow, and hand respectively, 2) The symptoms of musculoskeletal disorders were also associated with amount of text message and time for daily usage of smartphone. Specifically, relative risks of musculoskeletal disorders at hand/wrist/fingers in terms of "amount of text message" and "time for daily usage" for experienced user were 1.425 and 1.368 respectively to inexperienced user. This study identified 'amount of text message' and 'time for daily usage' as the major risk factors of smartphone usage in terms of musculoskeletal symptoms. The results of the study provided a good basis in order to remove or reduce the risks associated with musculoskeletal symptoms due to smartphone usage.

• 대한안전경영과학회지
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• 제10권4호
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• pp.31-38
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• 2008

Recently, there are many research of musculoskeletal disorders in manufacturing industry because of increasing interest of that disorders, but the research is still lacking in the small business and service industry. So we researched relationship between working characteristics and subjective symptoms associated with musculoskeletal disorders by get information of 145 hairdresser about working hour, work record, position and working pattern. The results of this research show that there are many musculoskeletal disorders of hairdressers' neck, shoulder, arm, knee and also close relationship between working characteristics and subjective symptoms associated with musculoskeletal disorders. Besides, some parts of subjective symptoms have an effect on other parts of body. This information contributes to future reference and a precautionary measure about musculoskeletal disorders for hairdressers.

• 한국안전학회지
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• 제20권3호
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• pp.202-211
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• 2005

Musculoskeletal Disorders(MSDs) have been a growing problems with higher incidence rate every year. The 65% of all work-related diseases in the US has been MSDs since the middle of the 90s according to BLS(Bureau of Labor Statistics, 1995). The MSDs in Korea has been increased in recent 10 years as well. This study has tried to focus on job stress associated with MSDs that has not been usually studied before. Specifically job stress of workers at automobile manufacturing industry and relationship between job stress and symptoms of MSDs have been major concerns in this study. The workers had higher stress with longer working experience, longer working hours, and worse working environment. The job stress had strong association with the symptoms at hand, wrist and low back. Specifically, job stress factors such as job requirement and job future ambiguity had more effects on the symptoms of MSDs.

• 한국안전학회지
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• 제26권5호
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• pp.89-98
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• 2011

Work-related musculoskeletal disorders (WMSDs) have become a hot issue in the Korean workplace for the past several years. So many manufacturing companies have tried to improve the work environments for the control and the prevention of the WMSDs. This study investigates the relation between WMSDs and job stress from 965 workers in a shipbuilding company by questionnaire analysis. The seven job stress factors which are job autonomy, job insecurity, organizational system, workplace culture, unfair compensation, relationship conflict, and job requirement were analyzed. The prevalence of musculoskeletal disorders symptoms were 12.9%. The analysis showed that job stress by job autonomy was higher than that by job stress factor. WMSDs were associated with job requirement, organizational system, unfair compensation and workplace culture. The results could be used to design the management program for the reduction of job stress.

• 대한안전경영과학회지
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• 제14권4호
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• pp.51-58
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• 2012

This study attempted to evaluate the direct and indirect effect of emotional labor, job and psychosocial stress, and fatigue of beauty industry workers on their musculoskeletal diseases. The findings of this study showed that, among the workers with perceived symptoms of musculoskeletal diseases, the body part with the most commonly occurring symptom was the shoulder, followed by neck, low back, wrist, arm, foot and knee. As for the effect of work-related psychological factors on musculoskeletal diseases, it was found that the workers with musculoskeletal diseases were more affected by emotional labor and fatigue than non-symptom workers. It was also shown that when their job stress increased, the fatigue level also increased, though their psychosocial stress decreased. In addition, it was found that both direct and indirect effects of emotional labor on fatigue were high, and the indirect effect of job stress through fatigue on musculoskeletal diseases was significant.

• 재활복지공학회논문지
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• 제6권1호
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• pp.51-58
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• 2012

본 연구에서는 근전도 신호를 기반으로 하여 환자의 재활 운동 시 발생하는 근 피로도의 변화에 따른 능동형 운동 부하 제어 시스템을 개발하였다. 본 능동형 부하 제어 시스템에 적합한 근 파라미터를 선정하기 위해 건강한 남성 12명을 대상으로 사전 실험을 수행하여 근전도 신호를 획득하였다. 또한 선정된 근 파라미터를 이용한 능동형 운동 부하 제어 시스템을 평가하기 위하여 근 골격계 질환이 없는 건강한 남성 10명을 대상으로 실험을 수행하였다. IEMG(Integrated electromyogram) 변화에 따른 운동 부하 변화를 관찰하여 개발된 능동형 부하 제어 시스템의 유용성 및 정확성을 확인하였으며, 개인의 주관적 피로도를 나타내는 운동자각도(rating of perceived exertion)를 활용하여 근 피로도와의 상관관계를 분석하였다. 따라서 본 연구에서 제안한 능동형 운동 부하 제어 시스템은 재활 운동 수행 시 환자 개개인에 적합한 초기 부하 및 운동량 조절에 유용할 것으로 사료된다.

• 보건의료산업학회지
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• 제8권4호
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• pp.121-130
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• 2014

To devise a plan to efficiently control and cope with musculoskeletal disorders, this study conducted a self-administered survey among dental hygienists working at dental clinics in Daegu. The data were collected from December 1, 2013 to February 28, 2014, and drew the following conclusions. For body posture for medical procedures, at lower levels in their careers, the hygienists' head and back were more bent; at higher levels in their careers, the their shoulders, body and hips were more bent; and at higher levels in their careers, their assistance posture in general was more bent. Hygienists with longer years of experience had more pain in the neck and the arms/elbows. Respondents engaged in medical treatment services were more likely to have pain in their arms/elbows, and those engaged in assisting in medical treatment and consulting and insurance services were more likely to have pain in their necks. It is necessary to recognize the seriousness of musculoskeletal disorders, provide specific education through supplementary training and relevant seminars, and avoid repetitive use of the same muscle or joint through environmental improvement of dental clinics, and personal efforts should be made to maintain good posture.

• 한국산업보건학회지
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• 제16권3호
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• pp.264-275
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• 2006

MSDs(Musculoskeletal Disorders) and Job Stress have been recognized as one of major problems in industry these days according to the results of most industrial health/safety studies. Specifically, MSDs have been growing problems in Korea as well as in US and European countries with higher incidence rate every year. This study tries to understand characteristics of job stress and association between MSDs and job stress for the workers at automobile manufacturing industry. This study also tries to understand the differences in terms of job stress between white collar and blue collar workers. The results showed that there was definite association between symptoms of MSDs and some of major job stress factors. However, there were big differences in terms of associations between two groups(white collar and blue collar workers). The first group(white collar workers) showed more associations between symptoms of MSDs and some of major job stress factors than that of the second group(blue collar workers) although symptom rate of the second group was higher than that of the first group. It could be concluded that symptoms of the first group had more effects from job stress while symptoms of the second group had more effects from typical job risk factors based on the results of the study.

• 한국안광학회지
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• 제14권4호
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• pp.65-69
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• 2009

목적: 최근 컴퓨터가 대량 보급되면서 VDT 증후군이 점차적으로 증가하고 있다. VDT 증후군은 VDT 작업자들에게 나타나는 근골격계 질환, 신경정신계 장애, 눈의 긴장, 피로, 자극과 충혈 등 안과적 증상을 포함한다. VDT 증후군의 환경요인으로는 전자파, 컴퓨터 화면의 크기, 밝기, 조명, 모니터 및 작업대의 높낮이, 작업시간, 작업의 종류, 작업자와 스크린과의 거리, 실내습도 및 온도, 사무실내의 공기오염, 환기 등이 있다. 본 연구에서는 근거리 시각 작업으로 인한 VDT 증후군에서 나타나는 주요 신체증상 및 신체 및 심리적으로 영향을 줄 수 있는 환경적 요인을 조사하였다. 방법: 연구대상자는 19세부터 28세사이의 남자 54명, 여자 66명으로 총 120명이었다. 책이나 문서 읽기, 컴퓨터 작업 등에 대한 근거리 작업을 할 때에 나타나는 신체적 증상과 육체적 불편함을 설문지를 이용하여 조사하였다. 조사항목에는 근업작업에 따른 주요 신체 증상과 눈의 자각 증상, 작업환경에 대한 만족도, 키보드, 마우스 사용시의 손목 통증 경험 등을 포함하였다. 결과: 장시간 컴퓨터, 문서, 전자기기를 사용할 때에 대부분(70%)이 신체적인 통증을 느끼는 것으로 나타났다. 통증부위는 주로 목과 허리(57.1%), 눈(45.2%), 두통(31%) 등이었다. 환경적 요인에서는 적절치 못한 조명으로 눈의 통증을 호소하는 사람들이 78.3%였다. 대부분의 증상은 '눈의 피로'(38.3%), '눈의 건조성'(31.9%), '눈의 흐릿함'(23.7%)이었다. 대상자들은 의자에 대한 불편함을 호소하였고 키보드, 마우스 사용 때 손목의 통증은 대부분 경험하였다. 결론: 전자기기, 문서 등을 이용할 때 빛, 공간, 자세, 작업대 등의 다양한 환경적 요인들이 조화롭지 못해 눈의 피로, 신체적인 피로감을 느낄 수 있다. 따라서 문서작업을 할 때에는 휴식시간에 대한 자기관리와 같은 예방법을 개발하여 눈의 피로를 줄여야 할 것이다. 또한 지속적인 연구를 통해 근골격계 질환 예방을 위해 최적의 시각적인 환경을 위한 인간공학적 디자인으로 작업환경을 바꾸어야 할 것이다.