Commonly Used Subjective Effort Scales May Not Predict Directly Measured Physical Workloads and Fatigue in Hispanic Farmworkers.
Commonly Used Subjective Effort Scales May Not Predict Directly Measured Physical Workloads and Fatigue in Hispanic Farmworkers.
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DOI：
10.3390/ijerph20042809
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发表时间：
2023-02-05
影响因子：
--
通讯作者：
Johnson, Peter W
中科院分区：
文献类型：
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作者：
Thamsuwan, Ornwipa;Galvin, Kit;Palmandez, Pablo;Johnson, Peter W
在北美，西班牙裔移民农场工人正面临职业性的人体工程学风险。由于文化差异的感知和报告的努力和痛苦，这是未知的，是否标准化的主观人体工程学评估工具可以准确地估计直接测量他们的身体努力。本研究调查了运动生理学中广泛使用的主观量表是否与该人群中代谢负荷和肌肉疲劳的直接测量相关。24名移民苹果收获者参加了这项研究。西班牙语的博格RPE和带有果树收割机图片的Omni RPE被用于评估全天8小时工作班次中四个时间点的总体努力。使用博格CR 10评估肩部局部不适。为了确定主观和直接测量的总体用力测量值之间是否存在关联，我们对博格RPE和Omni RPE的心率储备百分比（% HRR）进行了线性回归。在局部不适方面，使用肌电（EMG）的中位功率频率（MPF）来表示肌肉疲劳。然后对全天肌肉疲劳测量值从轮班开始到结束的博格CR10变化进行回归。发现Omni RPE与% HRR相关。此外，休息后博格RPE与% HRR相关，而工作后不相关。这些量表可能对某些情况有用。就局部不适而言，博格CR 10与EMG的MPF不相关，因此不能取代直接测量。
In North America, Hispanic migrant farmworkers are being exposed to occupational ergonomic risks. Due to cultural differences in the perception and reporting of effort and pain, it was unknown whether standardized subjective ergonomic assessment tools could accurately estimate the directly measured their physical effort. This study investigated whether the subjective scales widely used in exercise physiology were associated with the direct measures of metabolic load and muscle fatigue in this population. Twenty-four migrant apple harvesters participated in this study. The Borg RPE in Spanish and the Omni RPE with pictures of tree-fruit harvesters were used for assessing overall effort at four time points during a full-day 8-h work shift. The Borg CR10 was used for assessing local discomfort at the shoulders. To determine whether there were associations between the subjective and direct measures of overall exertion measures, we conducted linear regressions of the percentage of heart rate reserve (% HRR) on the Borg RPE and Omni RPE. In terms of local discomfort, the median power frequency (MPF) of trapezius electromyography (EMG) was used for representing muscle fatigue. Then full-day measurements of muscle fatigue were regressed on the Borg CR10 changes from the beginning to the end of the work shift. The Omni RPE were found to be correlated with the % HRR. In addition, the Borg RPE were correlated to the % HRR after the break but not after the work. These scales might be useful for certain situations. In terms of local discomfort, the Borg CR10 were not correlated with the MPF of EMG and, therefore, could not replace direct measurement.