Kong Yong-Ku
Department of Industrial Engineering, Sungkyunkwan University, Suwon, Korea.
Int J Occup Saf Ergon. 2014;20(4):595-606. doi: 10.1080/10803548.2014.11077077.
Eighteen co-ordination postures with shoulder flexion angles (0°, 45° and 90°) and elbow flexion angles (0°, 45° and 90°) in standing and sitting positions were evaluated to identify the effects of co-ordination postures on maximum grip strength and muscle activities of the upper limb in this study. Thirty-nine subjects were recruited and their maximum grip strengths were measured. According to the analysis of grip strength, grip strength was shown to be stronger in a standing posture (297.4 N) than in a sitting posture (274.6 N). In addition, grip strength (293.8 N) at 90° shoulder flexion angle was significantly higher than that at 0° and 45° shoulder angles. There was no statistically significant difference in grip strength from the effects of elbow angles in this study. The results of muscle activities for all muscle groups showed a similar trend with the results of grip strength associated with shoulder angles.
本研究评估了18种站立和坐姿下的协调姿势，这些姿势的肩部屈曲角度为（0°、45°和90°），肘部屈曲角度为（0°、45°和90°），以确定协调姿势对上肢最大握力和肌肉活动的影响。招募了39名受试者并测量了他们的最大握力。根据握力分析，站立姿势（297.4N）的握力比坐姿（274.6N）更强。此外，肩部屈曲角度为90°时的握力（293.8N）显著高于肩部角度为0°和45°时的握力。在本研究中，肘部角度对握力的影响没有统计学上的显著差异。所有肌肉群的肌肉活动结果与与肩部角度相关的握力结果呈现相似趋势。
