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首页> 外文期刊>Applied Ergonomics >Influence of snow shovel shaft configuration on lumbosacral biomechanics during a load-lifting task
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Influence of snow shovel shaft configuration on lumbosacral biomechanics during a load-lifting task

机译：铲雪铲轴构型对举重任务中腰s生物力学的影响

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Lower-back injury from snow shovelling may be related to excessive joint loading. Bent-shaft snow shovels are commonly available for purchase; however, their influence on lower back-joint loading is currently not known. Therefore, the purpose of this study was to compare L5/S1 extension angular impulses between a bent-shaft and a standard straight-shaft snow shovel. Eight healthy subjects participated in this study. Each completed a simulated snow-lifting task in a biomechanics laboratory with each shovel design. A standard motion analysis procedure was used to determine L5/S1 angular impulses during each trial, as well as peak L5/S1 extension moments and peak upper body flexion angle. Paired-samples t-tests (α = 0.05) were used to compare variables between shovel designs. Correlation was used to determine the relationship between peak flexion and peak moments. Results of this study show that the bent-shaft snow shovel reduced L5/S1 extension angular impulses by 16.5% (p = 0.022), decreased peak moments by 11.8% (p = 0.044), and peak flexion by 13.0% (p = 0.002) compared to the straight-shaft shovel. Peak L5/S1 extension moment magnitude was correlated with peak upper body flexion angle (r = 0.70). Based on these results, it is concluded that the bent-shaft snow shovel can likely reduce lower-back joint loading during snow shovelling, and thus may have a role in snow shovelling injury prevention.
机译：铲雪引起的后背受伤可能与关节过度负荷有关。弯轴雪铲通常可以购买;但是，目前尚不清楚它们对较低的后关节负荷的影响。因此，本研究的目的是比较弯轴雪铲和标准直轴雪铲之间的L5 / S1延伸角脉冲。八名健康受试者参加了这项研究。每个人在每种铲子设计下都在生物力学实验室中完成了模拟的除雪任务。在每次试验期间，使用标准运动分析程序确定L5 / S1角冲动，以及峰值L5 / S1伸展力矩和峰值上身屈曲角度。配对样本t检验（α= 0.05）用于比较铲子设计之间的变量。使用相关性确定峰值屈曲和峰值力矩之间的关系。这项研究的结果表明，弯轴铲雪机将L5 / S1延伸角脉冲减少了16.5％（p = 0.022），将峰值力矩减少了11.8％（p = 0.044），并将峰值弯曲减少了13.0％（p = 0.002） ）相比于直轴铲。峰值L5 / S1伸展力矩幅度与峰值上身屈曲角度相关（r = 0.70）。基于这些结果，得出的结论是，弯轴铲雪机可以在铲雪过程中减轻腰部的关节负荷，从而在铲雪伤害预防中发挥作用。

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