ABSTRACT

Laptop work may increase risks of neck and back injuries in the long term due to awkward postures and increased mechanical loads on cervical and lumbar spine. This study was intended to compare the muscle activities and postural changes as well as discomfort of the neck and back resulted from the laptop work in a conventional and adjusted setup. 20 young healthy males performed two 8-min sessions of computer-mouse work and typing in a conventional setup and in an ergonomically adjusted setup during laptop work. In the adjusted setup, the screen height was individually adjusted by a riser and the keyboard was externally connected. The posture of the cervical, thoracic, lumbar spines, and shoulder, as well as electromyographic activity of cervical and lumbar erector spinae, multifidus, upper trapezius and anterior deltoid muscles, were recorded during the first and last 2 min of each computer work session. Having completed the computer work session, furthermore, the participants scored their neck, back, and general discomfort. The very research findings implied that adjusting the screen height and keyboard placement was effective during laptop work in reducing the cervical (−4.53 deg) and thoracic flexion angles (−3.14 deg) as well as the cervical erector spinae (−10.31%) and multifidus (−15.57%) muscle activities, and resulted in lower discomfort. The typing task was associated with higher muscle activity and awkward posture compared with the mouse work. As for workstation setup, simple modifications may reduce risk factors of musculoskeletal complaints.

摘要

从长远来看，由于笨拙的姿势以及颈椎和腰椎的机械负荷增加，笔记本电脑工作可能会增加颈部和背部受伤的风险。这项研究的目的是比较常规和调整后的笔记本电脑工作所导致的肌肉活动和姿势变化以及颈部和背部不适。20名年轻健康的男性进行了两次8分钟的计算机鼠标工作，并在笔记本电脑工作期间输入了常规设置并按人体工程学进行了调整。在调整后的设置中，屏幕高度由提升板单独调整，并且键盘从外部连接。颈椎，胸廓，腰椎和肩膀的姿势，以及颈椎和腰部竖脊肌，多裂肌，斜方肌和前三角肌的肌电图活动，在每个计算机工作会话的前2分钟和后2分钟进行记录。此外，参加者在完成计算机工作后，还对他们的颈部，背部和全身不适感进行了评分。这项非常有研究意义的研究结果表明，在笔记本电脑工作期间，调整屏幕高度和键盘位置可有效减少颈椎（−4.53度）和胸屈角（−3.14度）以及颈椎直立脊柱（−10.31％）和多裂痕（-15.57％）的肌肉活动，并减少不适感。与鼠标工作相比，打字任务与较高的肌肉活动和笨拙的姿势有关。至于工作站的设置，简单的修改可以减少肌肉骨骼疾病的风险因素。参与者对他们的颈部，背部和全身不适感进行了评分。这项非常有研究意义的研究结果表明，在笔记本电脑工作期间，调节​​屏幕高度和键盘位置可有效减少颈椎（−4.53度）和胸屈角（−3.14度）以及颈椎直立脊柱（−10.31％）和多发症（-15.57％）的肌肉活动，并减少不适感。与鼠标工作相比，打字任务与较高的肌肉活动和笨拙的姿势有关。至于工作站的设置，简单的修改可以减少肌肉骨骼疾病的风险因素。参与者对他们的颈部，背部和全身不适感进行了评分。这项非常有研究意义的研究结果表明，在笔记本电脑工作期间，调整屏幕高度和键盘位置可有效减少颈椎（−4.53度）和胸屈角（−3.14度）以及颈椎直立脊柱（−10.31％）和多裂痕（-15.57％）的肌肉活动，并减少不适感。与鼠标工作相比，打字任务与较高的肌肉活动和笨拙的姿势有关。至于工作站的设置，简单的修改可以减少肌肉骨骼疾病的风险因素。14度）以及颈直肌脊柱（−10.31％）和多裂肌（−15.57％）的肌肉活动，从而减轻了不适感。与鼠标工作相比，打字任务与较高的肌肉活动和笨拙的姿势有关。至于工作站的设置，简单的修改可以减少肌肉骨骼疾病的风险因素。14度）以及颈直肌脊柱（−10.31％）和多裂肌（−15.57％）的肌肉活动，从而减轻了不适感。与鼠标工作相比，打字任务与较高的肌肉活动和笨拙的姿势有关。至于工作站的设置，简单的修改可以减少肌肉骨骼疾病的风险因素。