Yonsei University, Seoul, Republic of Korea.
Asia Pac J Public Health. 2011 May;23(3):378-85. doi: 10.1177/1010539511403729. Epub 2011 Apr 13.
This study was designed to identify the effects of a visual feedback device for hip adduction on trunk muscles and sitting posture when working at a visual display terminal. The forward head and trunk flexion angles of 20 workers were analyzed using a motion analysis system, and the activities of the lower trapezius, external abdominal oblique, internal abdominal oblique, and L5 paraspinal muscles were analyzed using a electromyography system. The statistical significance of differences between using and not using a visual feedback device was assessed by paired t tests. Using the visual feedback device during Visual Display Terminal work significantly decreased the forward head and trunk flexion angles, and significantly increased the activities of the external abdominal oblique, internal abdominal oblique, and L5 paraspinal muscles. The authors suggest that the visual feedback device for hip adduction promotes the adoption of standard spine and pelvic postures, which might be effective in preventing poor sitting postures.
本研究旨在确定在使用视讯显示器终端工作时，使用髋关节内收视觉反馈装置对躯干肌肉和坐姿的影响。使用运动分析系统分析了 20 名工人的头部前倾和躯干前屈角度，并使用肌电图系统分析了下斜方肌、腹外斜肌、腹内斜肌和 L5 棘突旁肌的活动。通过配对 t 检验评估使用和不使用视觉反馈装置的差异的统计学意义。在视讯显示器终端工作中使用视觉反馈装置可显著降低头部前倾和躯干前屈角度，并显著增加腹外斜肌、腹内斜肌和 L5 棘突旁肌的活动。作者认为，髋关节内收视觉反馈装置有助于保持标准的脊柱和骨盆姿势，这可能对预防不良坐姿有效。
