Delisle Alain, Imbeau Daniel, Santos Brenda, Plamondon André, Montpetit Yves
Occupational Health and Safety Research Institute Robert-Sauvé (IRSST), Safety Ergonomics Program, 505, boul de Maisonneuve Ouest, Montréal, Québec, Canada H3A 3C2.
Appl Ergon. 2004 Jan;35(1):21-8. doi: 10.1016/j.apergo.2003.10.001.
Alternatives to reduce postural constraints have to be sought in order to reduce musculoskeletal complaints related to computer work. This study aimed at documenting the impact of using the mouse on the left side of a standard keyboard (with a right numeric keypad) on upper-extremity posture. A simulated computer task was performed by 27 subjects in a laboratory before and 1 month after ergonomics training. Shoulder flexion and abduction, as well as wrist extension were reduced with left-handed mouse use. Sixteen of the 27 subjects truly converted to using the mouse with the left hand. After a month of using the mouse with the left hand, the time required to perform the same task reduced, the perceived difficulty and discomfort improved, though the time to perform the task was still longer than when using the mouse with the right hand. For work involving both keyboard and mouse use, and without the need of the numeric keypad, it would probably be preferable to use a keyboard without the numeric keypad if the mouse is to be used on the right-hand side. If such keyboards are unavailable, an interesting alternative would be to use the mouse on the left side provided sufficient time is allowed to get accustomed to it.
为了减少与电脑工作相关的肌肉骨骼问题，必须寻找减少姿势限制的替代方法。本研究旨在记录在标准键盘（带有右侧数字小键盘）左侧使用鼠标对上肢姿势的影响。27名受试者在实验室中进行了一项模拟计算机任务，分别在进行人体工程学训练前和训练后1个月进行。使用左手鼠标时，肩部前屈和外展以及手腕伸展角度减小。27名受试者中有16人真正转变为使用左手鼠标。在使用左手鼠标一个月后，完成相同任务所需的时间减少，主观难度和不适感有所改善，尽管完成任务的时间仍比使用右手鼠标时长。对于涉及键盘和鼠标使用且不需要数字小键盘的工作，如果鼠标要在右侧使用，可能最好使用没有数字小键盘的键盘。如果没有这种键盘，一个有趣的替代方法是在左侧使用鼠标，前提是要有足够的时间来适应。
