Ma Liang, Zhang Wei, Wu Su, Zhang Zhanwu
a Department of Industrial Engineering , Tsinghua University , P.R.China.
Int J Occup Saf Ergon. 2015;21(1):86-93. doi: 10.1080/10803548.2015.1017961.
This study was conducted to provide theoretical and experimental validation of a local muscle recovery model. Muscle recovery has been modeled in different empirical and theoretical approaches to determine work-rest allowance for musculoskeletal disorder (MSD) prevention. However, time-related parameters and individual attributes have not been sufficiently considered in conventional approaches. A new muscle recovery model was proposed by integrating time-related task parameters and individual attributes. Theoretically, this muscle recovery model was compared to other theoretical models mathematically. Experimentally, a total of 20 subjects participated in the experimental validation. Hand grip force recovery and shoulder joint strength recovery were measured after a fatiguing operation. The recovery profile was fitted by using the recovery model, and individual recovery rates were calculated as well after fitting. Good fitting values (r(2) > .8) were found for all the subjects. Significant differences in recovery rates were found among different muscle groups (p < .05). The theoretical muscle recovery model was primarily validated by characterization of the recovery process after fatiguing operation. The determined recovery rate may be useful to represent individual recovery attribute.
本研究旨在为局部肌肉恢复模型提供理论和实验验证。肌肉恢复已通过不同的经验和理论方法进行建模，以确定预防肌肉骨骼疾病（MSD）的工作休息时间。然而，传统方法中尚未充分考虑与时间相关的参数和个体属性。通过整合与时间相关的任务参数和个体属性，提出了一种新的肌肉恢复模型。从理论上讲，将该肌肉恢复模型与其他理论模型进行了数学比较。在实验方面，共有20名受试者参与了实验验证。在疲劳操作后测量握力恢复和肩关节力量恢复。使用恢复模型拟合恢复曲线，并在拟合后计算个体恢复率。所有受试者均获得了良好的拟合值（r²>.8）。不同肌肉群之间的恢复率存在显著差异（p<.05）。理论肌肉恢复模型主要通过对疲劳操作后恢复过程的表征进行验证。所确定的恢复率可能有助于表征个体恢复属性。
