Naqvi S A
Department of Mechanical Engineering, King Saud University, Riyadh, Saudi Arabia.
J Hum Ergol (Tokyo). 1994 Jun;23(1):41-9.
The main focus of this study was to identify and evaluate various forward seat inclinations (5, 10, 15 degrees) for Video Display Terminal workstation type seating by constructing a fixture to be fitted to a test chair to achieve various seat angles. The discomfort in critical areas i.e. neck and lower back were evaluated by 25 male university students (avg. age 22 years) with no history of musculoskeletal disorders on a subjective scale for comfort. The comfortable or uncomfortable seat inclinations were identified after a statistical analysis. The heart rate and blood pressure were observed every 5 min for validation purposes. It was recommended that, to avoid neck problems, a chair with a forward incline greater than 5 degrees should not be used and to avoid lower back problems a chair with a seat angle of approximately 10 degrees be used. On the overall comfort criteria it is recommended to use a chair with a seat pan which inclines to approximately 15 degrees (forward). The findings and recommendations from this study can enhance the safety and productivity of the people whose jobs require continuous forward bending in a sitting task involving VDT workstations.
本研究的主要重点是，通过构建一个可安装在测试椅上以实现不同座椅角度的固定装置，来识别和评估视频显示终端工作站类型座椅的各种前倾角度（5度、10度、15度）。25名无肌肉骨骼疾病病史的男性大学生（平均年龄22岁），以舒适度主观量表对颈部和下背部等关键部位的不适感进行了评估。经统计分析后确定了舒适或不舒适的座椅倾斜度。为进行验证，每隔5分钟观察一次心率和血压。建议为避免颈部问题，不应使用前倾角度大于5度的椅子；为避免下背部问题，应使用座椅角度约为10度的椅子。基于整体舒适度标准，建议使用座面倾斜约15度（前倾）的椅子。本研究的结果和建议可提高那些工作需要在涉及视频显示终端工作站的坐姿任务中持续向前弯曲的人员的安全性和工作效率。
