지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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Objective: The purpose of this study is to compare the workload level at each lower limbs posture and suggest the ergonomic workstation guideline for working period by evaluating the imbalanced lower limbs postures from the physiological and psychophysical points of view. Background: Many workers like welders are working in various imbalanced lower limbs postures either due to the narrow working conditions or other environmental conditions. Method: Ten male subjects participated in this experiment. Subjects were asked to maintain 3 different lower limbs postures(standing, squatting and bending) with 3 different working conditions(balanced floor with no scaffold, imbalanced floor with 10㎝ height of scaffold, and imbalanced floor with 20㎝ height of scaffold). EMG data for the 4 muscle groups(Retus Femoris, Vastus Lateralis, Tibialis Anterior, Gastrocnemius) from each lower limbs posture were collected for 20 seconds every 2 minutes during the 8 minutes sustaining task. Subjects were also asked to report their discomfort ratings of body parts such as waist, upper legs, lower legs, and ankle. Results: The ANOVA results showed that the EMG root mean square(RMS) values and the discomfort ratings(CR-10 Rating Scale) were significantly affected by lower limbs postures and working time(p＜0.05). The correlation was analyzed between the EMG data and the discomfort ratings. Also, prediction models for the discomfort rating for each posture were developed using physical condition, working time, and scaffold height. Conclusion: We strongly recommend that one should not work more than 6 minutes in a standing or squatting postures and should not work more than 4 minutes in a bending posture. Application: The results of this study could be used to design and assess working environments and methods. Furthermore, these results could be used to suggest ergonomic guidelines for the lower limbs postures such as squatting and bending in the working fields in order to prevent fatigue and pain in the lower limbs body.
목차
ABSTRACT
1. Introduction
2. Method
3. Results
4. Conclusion and Discussion
Acknowledgements
References
Author listings
참고문헌 (19)
참고문헌 신청
1. [학술지(정기간행물)] - Baker, P / 2003 / Knee disorders in the general population and their relation to occupation / Occupational and Environmental Medicine 60 (10) : 794 ~ 797
2. [단행본] - Basmajin, J. V / 1978 / Muscles Alive - Their Functions Revealed by Electromyography / Williams & Wilkins
3. [학술지(정기간행물)] - 홍창우 / 2009 / 근골격계 질환 예방을 위한 하지의 불균형 작업자세에서 근전도를 이용한 하지 근육의 작업부하 평가 / 대한인간공학회지 28 (3) : 81 ~ 85
4. [학술지(정기간행물)] - Coggon, D / 2000 / Occupational physical activities and osteoarthritis of the knee / Arthritis and Rheumatism 43 (7) : 1443 ~ 1449
5. [학술지(정기간행물)] - Cooper, C. / 1994 / Occupational activity and osteoarthritis of the knee / Annals of Rheumatology and Diseases 53 (2) : 90 ~ 93
2. [단행본] - Basmajin, J. V / 1978 / Muscles Alive - Their Functions Revealed by Electromyography / Williams & Wilkins
3. [학술지(정기간행물)] - 홍창우 / 2009 / 근골격계 질환 예방을 위한 하지의 불균형 작업자세에서 근전도를 이용한 하지 근육의 작업부하 평가 / 대한인간공학회지 28 (3) : 81 ~ 85
4. [학술지(정기간행물)] - Coggon, D / 2000 / Occupational physical activities and osteoarthritis of the knee / Arthritis and Rheumatism 43 (7) : 1443 ~ 1449
5. [학술지(정기간행물)] - Cooper, C. / 1994 / Occupational activity and osteoarthritis of the knee / Annals of Rheumatology and Diseases 53 (2) : 90 ~ 93
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UCI(KEPA) : I410-ECN-0101-2013-530-001350409