Dutta S P, Taboun S
Ergonomics. 1989 Aug;32(8):919-43. doi: 10.1080/00140138908966855.
The primary objective of this investigation was to determine optimum activity levels when carrying symmetrical loads in front of the body. Efficiency of mechanical work was used as the response variable for optimization purposes. This was defined as the ratio between the rate of energy transfer between and within body segments (Wwb) and the rate of net metabolic energy expenditure during the task (RNME). Response surface methodology was used to develop a model describing the relationship between the efficiency of mechanical work and three task related variables, i.e., load handled, frequency of handling and carrying distance. It was determined that a maximum efficiency of 31.74% is achieved under a combination of task conditions as follows: load = 16.72 kg; frequency = 3.64 handlings/min and carrying distance = 10.61 m. The implications of these findings are discussed in the paper.
本研究的主要目的是确定在身体前方搬运对称负荷时的最佳活动水平。为了进行优化，机械功效率被用作响应变量。它被定义为身体各节段之间以及节段内部能量转移速率（Wwb）与任务期间净代谢能量消耗速率（RNME）之比。响应面法被用于建立一个模型，描述机械功效率与三个任务相关变量之间的关系，即搬运负荷、搬运频率和搬运距离。结果确定，在如下任务条件组合下可实现31.74%的最大效率：负荷 = 16.72千克；频率 = 3.64次/分钟；搬运距离 = 10.61米。本文讨论了这些研究结果的意义。
