The relationship between ratings of perceived exertion (RPE) and relative strength for a fatiguing dynamic upper extremity task: A consideration of multiple cycles and conditions.
The relationship between ratings of perceived exertion (RPE) and relative strength for a fatiguing dynamic upper extremity task: A consideration of multiple cycles and conditions.
复制标题
疲劳动态上肢任务的感知用力 (RPE) 评级与相对强度之间的关系：考虑多个循环和条件。
DOI：
10.1080/15459624.2023.2180512
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发表时间：
2023
影响因子：
2
通讯作者：
Cavuoto,LoraA
中科院分区：
文献类型：
--
作者：
Vahedi,Zahra;KazemiKheiri,Setareh;Hajifar,Sahand;RaganiLamooki,Saeb;Sun,Hongyue;Megahed,FadelM;Cavuoto,LoraA
本研究的目的是评估针对上肢的疲劳自由动态任务（即模拟订单拣选）的感知用力（RPE）评级和相对强度相对于基线的关系，并确定该关系是否在不同条件下保持相同（即，和疲劳）。14名参与者（7名男性，7名女性）进行了四次会议，其中包括两个45分钟的工作时间间隔15分钟的休息。工作周期包括从肩部高度拾取称重瓶并在腰部高度包装瓶，瓶质量和拾取速率的四种组合为：2.5 kg-15瓶/分钟（bpm）、2.5 kg-10 bpm、2.5 kg-5 bpm和1.5 kg-15 bpm。参与者每5分钟报告一次RPE，每9分钟进行一次最大等长肩关节屈曲运动。Pearson积差相关用于评估RPE与每个受试者和工作时间的相对强度之间的线性关系。然后，使用重复测量方差分析（ANOVA）的平均关系的条件和工作时间的影响进行了评估。在最初的45分钟内，不同条件下RPE和相对强度之间的相关性没有显著差异（平均r =-0.62（标准差= 0.38）;p= 0.57）。第二个工作周期的平均相关性显著下降（r =-0.39（0.53））。这些结果表明，个人的主观反应一致增加，而相对强度下降时，从非疲劳状态开始。然而，当在不完全恢复后重新从事工作时，相关性较弱。因此，在考虑RPE和相对强度之间的预期关系时，应考虑起始疲劳水平。
The goal of this study was to evaluate the relationship between ratings of perceived exertion (RPE) and relative strength with respect to baseline for a fatiguing free dynamic task targeting the upper extremity, namely simulated order picking, and determine whether the relationship remains the same for different conditions (i.e., pace and weight) and with fatigue. Fourteen participants (seven males, seven females) performed four sessions that included two 45-min work periods separated by 15 min of rest. The work periods involved picking weighted bottles from shoulder height and packaging them at waist height for four combinations of bottle mass and picking rate: 2.5 kg–15 bottles per minute (bpm), 2.5 kg–10 bpm, 2.5 kg–5 bpm, and 1.5 kg–15 bpm. Participants reported their RPEs every 5 min and performed a maximum isometric shoulder flexion exertion every 9 min. Pearson product-moment correlation was used to evaluate the linear relationship between RPE and relative strength for each subject and work period. Then, the effects of condition and work period on the average relationship were assessed using a repeated-measures analysis of variance (ANOVA). For the first 45-min period, there were no significantly different correlations between RPE and relative strength across conditions (average r = −0.62 (standard deviation = 0.38);p= 0.57). There was a significant decrease in average correlation for the second work period (r = −0.39 (0.53)). These results suggest that individual subjective responses consistently increase while relative strength declines when starting from a non-fatigued state. However, correlations are weaker when re-engaging in work following incomplete recovery. Thus, starting fatigue levels should be accounted for when considering the expected relationship between RPE and relative strength.