Tepper M, Vollenbroek-Hutten M M R, Hermens H J, Baten C T M
Roessingh Research and Development, Roessinghsbleekweg 33b, AH Enschede 7522, The Netherlands.
Appl Ergon. 2003 Mar;34(2):125-30. doi: 10.1016/S0003-6870(02)00145-X.
Investigate whether an ergonomic computer device, characterised by an inclined working area and keyboard localisation close to the screen (the Up-Line), decreases the muscle activity of the upper trapezius muscle.
In a crossover design 19 healthy subjects and 19 patients with Whiplash Associated Disorder (WAD) typed during 10 min at the Up-Line and at a standard workstation with 15 min of rest in between. During typing surface EMG was measured of the trapezius muscle. The subjects were asked to rate sitting comfort and complaints.
Although most subjects subjectively preferred the Up-Line, on average no significant differences were found in muscle activity between the two workstations for both patients and healthy subjects. Individually in 5 healthy subjects (25%) and in 6 patients (31%) muscle activity was lower when working at the Up-Line.
Although some subjects subjectively prefer the Up-Line in sitting comfort, on average the Up-Line did not decrease the muscle activity, both in healthy subjects as in patients with WAD.
研究一种符合人体工程学的计算机设备，其特点为工作区域倾斜且键盘靠近屏幕（上线式），是否能降低上斜方肌的肌肉活动。
采用交叉设计，19名健康受试者和19名挥鞭样损伤相关疾病（WAD）患者在上线式设备和标准工作站上各打字10分钟，中间休息15分钟。打字过程中测量斜方肌的表面肌电图。受试者被要求对坐姿舒适度和不适情况进行评分。
尽管大多数受试者主观上更喜欢上线式设备，但在患者和健康受试者中，两个工作站之间的肌肉活动平均未发现显著差异。分别有5名健康受试者（25%）和6名患者（31%）在使用上线式设备工作时肌肉活动较低。
尽管一些受试者主观上更喜欢上线式设备带来的坐姿舒适度，但总体而言，无论是健康受试者还是WAD患者，上线式设备均未降低肌肉活动。
