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Abstract：
A large and increasing number of the work force in the population spend their work hours at the keyboard. There is evidence that repetitive high levels of static work, or extreme working postures involving the neck-shoulder muscles are an increased risk for chronic neck-shoulder pain. The aim of this study was to investigate the effect of dynamic computer working (DCW), using a mobile application to the desk surface, on pain characteristics and biomarkers in office workers. We included 10 female subjects. All subjects answered questionnaires about general health, pain intensity and characteristics. The pressure pain threshold (PPT), neck range and motion, neck and shoulder strength were measured. Microdialysis was conducted in trapezius muscle. Measurements were performed before and 4 weeks after DCW. Multivariate analysis, orthogonal partial least square discriminate analysis (OPLS-DA) and univariate analysis paired test, Wilcoxon, was performed. There was significant improvement in reported neck pain, quality of life, and psychological distress after 4 weeks DCW. The PPT and strength in neck and shoulder were significantly increased after DCW. A significant OPLS-DA model showed clear separation between the samples collected before and after 4 weeks DCW. In conclusion, these results show that keyboard work at a movable desk application might decrease the risk of repetitive strain injuries in the neck and shoulder muscles.
摘要：
人口中越来越多的劳动力在键盘上花费工作时间。有证据表明，重复高水平的静态工作，或涉及颈肩肌肉的极端工作姿势会增加慢性颈肩疼痛的风险。本研究的目的是探讨动态计算机工作(DCW)的影响，使用移动应用程序到桌面，办公室工作人员的疼痛特征和生物标志物。我们包括10名女性受试者。所有受试者都回答了关于总体健康的问卷，疼痛强度和特点。压力痛阈值（PPT），颈部范围和运动，测量颈部和肩部的力量。在斜方肌中进行微透析。在DCW之前和之后4周进行测量。多变量分析，正交偏最小二乘判别分析(OPLS-DA)和单变量分析配对检验，Wilcoxon,已执行。报告的颈部疼痛有显著改善，生活质量,4周后DCW和心理困扰。DCW后颈部和肩部的PPT和力量显着增加。显著的OPLS-DA模型显示在4周DCW之前和之后收集的样品之间的清晰分离。总之,这些结果表明，在可移动的办公桌上使用键盘可以降低颈部和肩部肌肉重复劳损的风险。
