Subramaniam Ambusam, Singh Devinder Kaur Ajit
Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Malaysia.
Faculty of Health and Life Sciences, INTI International University, Malaysia.
Int J Occup Saf Ergon. 2021 Mar;27(1):48-54. doi: 10.1080/10803548.2018.1543101. Epub 2019 Jan 11.
. The aim of this study was to examine the effects of using a document holder while typing on head excursion and neck muscle activity among computer users with and without neck pain. . An experimental study including 52 individuals with ( = 26) and without ( = 26) neck pain was conducted. Head excursion and neck muscle activity were measured using an accelerometer and surface electromyography, respectively. Two-way analysis of variance was conducted to examine the effects of using a document holder between computer users with and without neck pain. . The results demonstrated a decrease in head excursion ( < 0.001) and muscle activity of both the right and left upper trapezius and the left lower trapezius and right anterior deltoid ( < 0.05) with the use of a document holder. Computer users with neck pain had significantly ( < 0.001) higher right lower trapezius muscle activity compared to the group without neck pain. . The results of the study supported the use of a document holder to assist in decreasing head excursion and neck muscle activity. The use of a document holder while typing may be beneficial in preventing repetitive strain injuries among computer users.
本研究的目的是考察在打字时使用文件架对有和没有颈部疼痛的计算机用户的头部偏移和颈部肌肉活动的影响。进行了一项实验研究，纳入了52名个体，其中26名有颈部疼痛，26名没有颈部疼痛。分别使用加速度计和表面肌电图测量头部偏移和颈部肌肉活动。进行双向方差分析，以考察在有和没有颈部疼痛的计算机用户中使用文件架的影响。结果表明，使用文件架时，头部偏移减少（P<0.001），左右上斜方肌、左下方斜方肌和右前三角肌的肌肉活动减少（P<0.05）。与没有颈部疼痛的组相比，有颈部疼痛的计算机用户右下斜方肌的肌肉活动显著更高（P<0.001）。研究结果支持使用文件架来帮助减少头部偏移和颈部肌肉活动。打字时使用文件架可能有助于预防计算机用户的重复性劳损损伤。
