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논문 기본 정보

자료유형
학술저널
저자정보
Kyung Ko (Gangnam-Gu Health Center) Hee-Soo Kim (Hallym Medical Center) Ji-Hea Woo (Hallym College)
저널정보
대한인간공학회 대한인간공학회지 대한인간공학회지 제32권 제3호
발행연도
2013.6
수록면
273 - 278 (6page)

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초록· 키워드

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Objective: This study aims to analyze and evaluate fatigue in upper trapezius muscles of adults when inputting text on a smart phone, thereby examining the risk of cumulative trauma disorders in the musculoskeletal system of the upper extremity. Method: Forty-five healthy adults were divided equally into three groups: a smartphone group, a notebook group, and a desktop group. A surface electromyogram was placed on the upper trapezius muscle of each participant, after which they inputted text for ten minutes within an ergonomic setting; their side posture was recorded on video and analyzed. Results: The spectral edge frequency values for the smartphone group, as recorded from the upper right trapezius muscles on the surface electromyogram, showed a significant decrease(p<.05). Regarding the RULA, all three groups had results indicating "action level 2". Conclusion: All three groups had results indicating "action level 2" according to the RULA, which means that additional research on the posture of the participants while performing tasks is necessary, and their posture needs to be corrected. In particular, the smartphone group has the highest levels of fatigue in the upper trapezius muscles, suggesting that the task of inputting text on a smartphone is a high risk for causing cumulative trauma disorders.

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ABSTRACT
1. Introduction
2. Method
3. Results
4. Discussion
5. Conclusion
References

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