Lee Y H, Chen Y L
Department of Industrial Management, National Taiwan Institute of Technology, Taipei, R.O.C.
Ergonomics. 1995 Sep;38(9):1859-66. doi: 10.1080/00140139508925233.
The objective of the present laboratory study was to analyse physiological responses of horizontal lifting tasks when they were performed in sitting and standing positions. Heart rate and blood pressure were used as indices of circulatory strain. Lifting tasks were performed under four lifting positions: sitting-forward lift, sitting-twist lift, standing-forward lift, and standing-twist lift. The weights of the loads were 3, 5 and 7 kg and the frequencies of handling were 1, 4 and 6 lifts/min. This study supports the idea that heart rate is a sensitive measure for evaluating the effects of seated horizontal lifting tasks. The lifting positions and workload (frequency x load x distance) are important parameters in the design of these types of tasks. It appears that within the experimental values examined in this study, a seated position could be recommended while performing horizontal lifting tasks at workloads < or = to 4.6 kg.m.min-1. The results are supported by smaller physiological responses.
本实验室研究的目的是分析在坐姿和站姿下进行水平提升任务时的生理反应。心率和血压被用作循环系统应变的指标。提升任务在四种提升姿势下进行：坐姿前向提升、坐姿扭转提升、站姿前向提升和站姿扭转提升。负载重量为3、5和7千克，操作频率为每分钟1、4和6次提升。本研究支持心率是评估坐姿水平提升任务效果的敏感指标这一观点。提升姿势和工作量（频率×负载×距离）是设计这类任务的重要参数。在本研究中所考察的实验值范围内，当工作量≤4.6千克·米·分钟⁻¹时，进行水平提升任务时推荐采用坐姿。较小的生理反应支持了这些结果。
