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首页> 外文期刊>Clinical biomechanics >An on-body personal lift augmentation device (PLAD) reduces EMG amplitude of erector spinae during lifting tasks.
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An on-body personal lift augmentation device (PLAD) reduces EMG amplitude of erector spinae during lifting tasks.

机译：身体上的个人提升装置（PLAD）可在提升任务期间降低竖脊肌的EMG振幅。

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BACKGROUND: A new on-body personal lift augmentation device was developed to support the back muscles during the repetitive lifting task. METHODS: Nine male subjects participated in the study. Three Fastrak units were used to record positions and rotations of the segments. Trunk muscle normalized and integrated electromyography of the left and right thoracic erector spinae, lumbar erector spinae, external obliques, and rectus abdominis, as well as the kinematic variables of peak lumbar angle, peak pelvis angle, peak trunk acceleration, peak load acceleration were compared in symmetrical lifting for three different loads (5 kg, 15 kg, 25 kg) with three different styles (stooped, squat, free) under two conditions of with and without personal lift assist device. FINDINGS: The lift assist device significantly reduced the required muscular effort of the lumbar (p = 0.001) and thoracic erector spinae with no significant differences in the level of abdominal muscle activity. The amount of integrated electromyography reduction ranged from 14.4% to 27.6% for the lumbar and thoracic erector spinae respectively. Simple measures of trunk posture and accelerations confirmed that there were no differences in lifting technique that would cause the integrated electromyography activity to be reduced. No major kinematic differences were found when the lift assist device was worn indicating that it did not alter these specific technique variables. INTERPRETATION: The lift assist device did reduce the required muscular effort of the lumbar and thoracic erector spinae without adversely affecting the level of abdominal muscle activity. This reduction may help reduce the risk of recurring back injuries or assist in the return to work phase, especially in repetitive tasks.
机译：背景：开发了一种新型的人体个人提升设备，以在重复提升任务中支撑背部肌肉。方法：9名男性受试者参加了这项研究。三个Fastrak单元用于记录段的位置和旋转。比较左，右胸直肌，腰直肌，外斜肌和腹直肌的躯干肌归一化和积分肌电图，以及峰腰角，峰骨盆角，峰躯干加速度，峰负荷加速度的运动学变量在带有和不带有个人举升辅助装置的两种情况下，以三种不同的样式（弯曲，下蹲，自由）在三种不同的载荷（5 kg，15 kg，25 kg）下对称举升。研究结果：该举升辅助装置显着减少了腰椎和胸廓脊柱所需的肌肉力量（p = 0.001），而腹部肌肉活动水平没有显着差异。腰椎和胸直肌的综合肌电图减少量分别为14.4％至27.6％。通过简单测量躯干姿势和加速度，可以确认起重技术没有差异，这会导致综合肌电图活动降低。佩戴起重辅助装置时，没有发现主要的运动学差异，表明它没有改变这些特定的技术变量。解释：举升辅助装置确实减少了腰椎和胸廓脊柱脊柱所需的肌肉力量，而没有对腹部肌肉活动水平产生不利影响。这种减少可能有助于减少再次发生背部受伤的风险，或有助于重返工作阶段，尤其是在重复性任务中。

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