Juul-Kristensen B, Hansson G A, Fallentin N, Andersen J H, Ekdahl C
Department of Physiology, National Institute of Occupational Health, Copenhagen, Denmark.
Appl Ergon. 2001 Oct;32(5):517-24. doi: 10.1016/s0003-6870(01)00017-5.
The aim was to study postures and movements during repetitive work using video-based observations and direct technical measurements (inclinometers and goniometers). A total of 21 healthy women from a poultry processing plant volunteered. Neck flexion > 20 degrees was registered during 92% of the recorded time with the observation method, while the corresponding value measured with the inclinometer was 65%. Different reference positions and different measured variables apparently contributed to the differences between the methods. Mean wrist position was measured to be 0 degrees in flexion-extension and 19 degrees in ulnar deviation. Differences between the methods in the registered hand positions were small. The number of repetitive movements/minute and mean power frequency (MPF) of the electrogoniometer data was significantly related, showing both variables to be relevant measures of repetitiveness. In conclusion, the observation method and the technical measurements supplemented each other well. A reduction in class categories was suggested for future observation methods.
目的是使用基于视频的观察和直接技术测量（倾角仪和测角仪）来研究重复性工作期间的姿势和动作。一家家禽加工厂的21名健康女性自愿参与。采用观察法时，在92%的记录时间内记录到颈部屈曲>20度，而用倾角仪测量的相应值为65%。不同的参考位置和不同的测量变量显然导致了两种方法之间的差异。测得手腕屈伸平均位置为0度，尺侧偏斜为19度。两种方法在记录的手部位置上的差异较小。每分钟重复动作的次数与电子测角仪数据的平均功率频率（MPF）显著相关，表明这两个变量都是重复性的相关测量指标。总之，观察法和技术测量法相互补充得很好。建议未来的观察方法减少类别。
