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논문 기본 정보

자료유형
학술대회자료
저자정보
김슬기 (부산대학교) 이일석 (부산대학교) 강상현 (부산대학교) 진상은 (부산대학교)
저널정보
대한인간공학회 대한인간공학회 학술대회논문집 2019 대한인간공학회 춘계학술대회
발행연도
2019.5
수록면
4 - 8 (5page)

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초록· 키워드

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Objective: This study investigated the change of body postures according to various lower extremity seating strategies while prolonged sitting. Background: Previous studies has been studied various chair designs, but they are limited in that they just simply focused on the low back posture in a short time. Method: A total of 16 adult male and female healthy participants were recruited, and asked to sit for 45 minutes and watch a video without any restriction. Each participant visited three times for testing three different sitting strategies including upright sitting, semi-standing, kneeling posture. Body kinematics was measured with a motion capture system including the lumbar flexion angle, the pelvic tilting angle, the head flexion angle, and the rounded shoulder angle. Body kinetics was captured with a forceplate, and used to calculate mean and standard deviation of the center of pressure (CoP) in anterior-posterior axis. Results: In all three sitting strategies, lumbar flexion angle, pelvic tilt angle, head flexion angle and round shoulder angle were significantly different according to sitting strategy and time, but there was no significance in its interaction effect. The upright sitting showed the greatest variation while 45 min sitting with a negative effect on the lumbar lordosis, head flexion and rounded shoulder angle, and the magnitude of negative effects was increased with time. CoP also showed an increase of postural sway over time in upright sitting. Conclusion: The effect of time was clear in all three strategies by showing more postural changes and an increase in discomfort rating. Among three sitting strategies, the upright sitting was worst in all kinematics variable, while the kneeling and semi-standing postures showed more neutral sitting postures while 45 min prolonged sitting. In this study, we propose a seating strategy considering lower extremity such as semi-standing and kneeling rather than upright sitting under the prolonged sitting condition.
Application: The office chair should be designed under the consideration of the lower extremity postures such as the position of foots, the knee supporter, and the seat inclination angle.

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

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