Romaniello Roberto, Tamborrino Antonia, Leone Alessandro
University of Foggia.
University of Bari Aldo Moro.
J Agric Saf Health. 2018 Jul 31;24(3):141-153. doi: 10.13031/jash.12720.
The use of mobile elevated work platforms (MEWPs) versus ladders was studied to evaluate the physical activity (PA) of workers and their performance during olive tree pruning. Accelerometers worn by the workers were used to measure triaxial accelerations, which were converted into PA using Freedson's equation. The mean values of acceleration on the three axes for workers on ladders led to statistically higher results than for workers on MEWPs. The energy expenditure (EE) and metabolic equivalent (MET) values were statistically different (about 1.8 times higher) for the ladder work site than for the MEWP work site. The use of an MEWP leads to more time spent on moderate activity (84.30%) than when using a ladder (71.90%) but no time on vigorous activity compared to a ladder (13.88%). The pruning performance was 3.8 for the MEWP and 1.4 for the ladder, while the labor productivity was 11.4 for the MEWP and 4.2 for the ladder. Thus, it is possible to reduce worker employment and costs by about 2.7 times with MEWPs.
研究了使用移动高空作业平台（MEWP）与梯子对橄榄树修剪工人身体活动（PA）及其工作表现的影响。工人佩戴加速度计来测量三轴加速度，并使用弗里德森方程将其转换为身体活动量。梯子上工人三轴加速度的平均值在统计学上高于使用移动高空作业平台的工人。梯子作业现场的能量消耗（EE）和代谢当量（MET）值在统计学上与移动高空作业平台作业现场不同（约高1.8倍）。与使用梯子相比，使用移动高空作业平台时，工人进行中等强度活动的时间更多（84.30%），而进行剧烈活动的时间为零（与梯子的13.88%相比）。移动高空作业平台的修剪效率为3.8，梯子为1.4，而移动高空作业平台的劳动生产率为11.4，梯子为4.2。因此，使用移动高空作业平台可将工人雇佣和成本降低约2.7倍。
