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.
이용수
초록· 키워드
오류제보하기
Objective: The aim of this study is to investigate the effects of trunk-forearm supported sitting on trunk flexion angle, trunk extensor fatigue and seat contact pressure.
Background: The relationship between sitting posture and musculoskeletal disorders of the trunk extensor fatigue and seat contact pressure has been documented. The trunk-forearm support type ergonomic chair was devised from the fact that trunkforearm support has been reported to reduce trunk extensor activity and discomfort.
Method: Using three different sitting postures, upright (P1), trunk-forearm supported (P2) and normal sitting (P3), six healthy subjects participated in the study. Motion capture system was used to collect head and trunk flexion angle, and surface electromyography (sEMG) was used to collect myoelectric signal of upper trapezius, lower trapezius, erector spinae, multifidus, and pressure mat system was used to measure seat contact pressure.
Results: When trunk and forearm were supported by the ergonomic chair, higher head flexion angle showed upright > trunk-forearm supported > normal in order, and muscle fatigue showed less than upright and normal sitting. Mean seat contact pressure decreased 19% than upright sitting. But muscle fatigue was not affected by each condition.
Conclusion: Trunk-forearm supported sitting of the ergonomic chair showed positive effect in respect of trunk and head flexion angle, trunk extensor fatigue, seat contact pressure. To acquire comprehensive understanding of the effectiveness of the ergonomic chair, further studies such as anatomical effects from measurement of external applied loading effect to the body from interface pressure analysis are required.
Application: The results of the publishing trend analysis might help physiological effects of trunk-forearm support type chair.
Background: The relationship between sitting posture and musculoskeletal disorders of the trunk extensor fatigue and seat contact pressure has been documented. The trunk-forearm support type ergonomic chair was devised from the fact that trunkforearm support has been reported to reduce trunk extensor activity and discomfort.
Method: Using three different sitting postures, upright (P1), trunk-forearm supported (P2) and normal sitting (P3), six healthy subjects participated in the study. Motion capture system was used to collect head and trunk flexion angle, and surface electromyography (sEMG) was used to collect myoelectric signal of upper trapezius, lower trapezius, erector spinae, multifidus, and pressure mat system was used to measure seat contact pressure.
Results: When trunk and forearm were supported by the ergonomic chair, higher head flexion angle showed upright > trunk-forearm supported > normal in order, and muscle fatigue showed less than upright and normal sitting. Mean seat contact pressure decreased 19% than upright sitting. But muscle fatigue was not affected by each condition.
Conclusion: Trunk-forearm supported sitting of the ergonomic chair showed positive effect in respect of trunk and head flexion angle, trunk extensor fatigue, seat contact pressure. To acquire comprehensive understanding of the effectiveness of the ergonomic chair, further studies such as anatomical effects from measurement of external applied loading effect to the body from interface pressure analysis are required.
Application: The results of the publishing trend analysis might help physiological effects of trunk-forearm support type chair.
목차
1. Introduction
2. Method
3. Results and Discussion
4. Conclusion
References
참고문헌 (11)
참고문헌 신청
1. [학술지(정기간행물)] - Cook, C. / 2004 / The effect of upper extremity support on upper extremity posture and muscle activity during keyboard use / Applied Ergonomics 35 : 285 ~ 292
2. [학술지(정기간행물)] - 공용구 / 2011 / The Effects of Coordinated Upper-limb Postures of Back, Shoulder, and Elbow Flexion Angles on the Subjective Discomfort Rating, Heart Rate, and Muscle Activities / 대한인간공학회지 30 (6) : 695 ~ 703
3. [학술지(정기간행물)] - Koo, J.W. / 2010 / Occupational Disorders among Office Workers / Hanyang Medical Reviews 30 (4) : 1738 ~ 1429
4. [학술지(정기간행물)] - Lee, Y.S. / 1997 / An ergonomic study on the design parameters for office chair / Journal of the Korea Furniture Society 8 (1) : 17 ~ 28
5. [학술지(정기간행물)] - 이의철 / 2007 / 사무직 근로자에서 직무스트레스 및 VDT작업과 목？어깨 근골격계 증상과의 관련성 / Annals of Occupational and Environmental Medicine 19 (3) : 187 ~ 195
2. [학술지(정기간행물)] - 공용구 / 2011 / The Effects of Coordinated Upper-limb Postures of Back, Shoulder, and Elbow Flexion Angles on the Subjective Discomfort Rating, Heart Rate, and Muscle Activities / 대한인간공학회지 30 (6) : 695 ~ 703
3. [학술지(정기간행물)] - Koo, J.W. / 2010 / Occupational Disorders among Office Workers / Hanyang Medical Reviews 30 (4) : 1738 ~ 1429
4. [학술지(정기간행물)] - Lee, Y.S. / 1997 / An ergonomic study on the design parameters for office chair / Journal of the Korea Furniture Society 8 (1) : 17 ~ 28
5. [학술지(정기간행물)] - 이의철 / 2007 / 사무직 근로자에서 직무스트레스 및 VDT작업과 목？어깨 근골격계 증상과의 관련성 / Annals of Occupational and Environmental Medicine 19 (3) : 187 ~ 195
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UCI(KEPA) : I410-ECN-0101-2015-500-001461430