Department of Industrial Engineering and Management Information, Huafan University, 1, Hua Fan Road, Shihtin Hsiang Taipei Hsien, Taiwan 223, Taiwan, ROC.
Appl Ergon. 2010 Jul;41(4):615-9. doi: 10.1016/j.apergo.2009.12.015. Epub 2010 Feb 8.
This study used a psychophysical approach to examine the effects of carrying methods and the presence or absence of box handles on the maximum acceptable weight carried and resulting responses (heart rate and rating of perceived exertion) in a two-person carrying task. After training, 16 female subjects performed a two-person carrying task at knuckle height for an 8-h work period. Each subject performed 4 different carrying combinations two times. The independent variables were carrying methods (parallel and tandem walking) and box handles (with and without handles). For comparison with two-person carrying, the subjects also performed one-person carrying. The results showed that the maximum acceptable weight carried (MAWC), heart rate (HR), and rating of perceived exertion (RPE) were significantly affected by the presence of box handles. However, the subjects' MAWC, HR, and RPE values were not significantly influenced by the carrying methods. The test-retest reliability of the psychophysical approach was 0.945. The carrying efficiency of two-person carrying was 96.2% of the one-person carrying method. In general, the use of box with handles allows the subjects to carry a higher MAWC (with lower HR and RPE) compared to carrying boxes without handles.
本研究采用心理物理方法，考察了搬运方式以及箱子提手的存在或缺失对双人搬运任务中最大可承受重量和相关反应（心率和感知用力程度评分）的影响。在培训后，16 名女性受试者以指节高度进行了为期 8 小时的双人搬运任务。每位受试者进行了 4 种不同搬运组合的 2 次重复实验。自变量为搬运方式（平行和串联行走）和箱子提手（有提手和无提手）。为了与双人搬运进行比较，受试者还进行了单人搬运。结果表明，最大可承受重量（MAWC）、心率（HR）和感知用力程度评分（RPE）显著受到箱子提手的影响。然而，搬运方式对受试者的 MAWC、HR 和 RPE 值没有显著影响。心理物理方法的测试-重测信度为 0.945。双人搬运的搬运效率是单人搬运方法的 96.2%。总体而言，与没有提手的箱子相比，使用带提手的箱子可以让受试者承受更大的 MAWC（更低的 HR 和 RPE）。
