The operators of excavators often suffer from dreadful Whole-Body Vibration. Besides, the operators are subject to postural instability which is considered to be a serious occupational health hazard. The main objective of this study is to investigate the role of Lumbar Support Cushion in mitigation of Whole-Body Vibration and postural instability under three different operating conditions such as Front-Manipulator Motion, Swing Motion and Propel-Drive Motion. The obtained Vibration Dose Value reveals a significant difference between the operation cycle (p < 0.001). Moreover, across the operation cycle with Lumbar Support Cushion a significant decrease in Vibration Dose Value (8) is observed on the operator seat-pan and backrest (p < 0.05). Further, the effect of Whole-Body Vibration on physiological stress factors, a significant decrease in systolic blood pressure by 1.26%, pulse rate by 2.75% and Rate Pressure Product by 4%, is observed with the use of Lumbar Support Cushion (p < 0.05) during the operation. The Lumbar Support Cushion helps in promoting a symmetric seating posture, and using Lumbar Support Cushion could help the excavator operator to increase in productivity during shift hour.

挖掘机的操作员经常遭受可怕的全身振动。此外，操作者容易出现姿势不稳，这被认为是一种严重的职业健康危害。本研究的主要目的是研究腰部支撑垫在三种不同的操作条件下（例如前机械手运动、摆动运动和推进驱动运动）在减轻全身振动和姿势不稳定方面的作用。获得的振动剂量值揭示了操作周期之间的显着差异 ( p < 0.001)。此外，在使用腰部支撑垫的整个操作周期中，观察到操作员座椅底板和靠背上的振动剂量值 (8) 显着降低 ( p< 0.05)。此外，使用腰部支撑垫观察到全身振动对生理压力因素的影响，收缩压显着降低 1.26%，脉率显着降低 2.75%，心率压力乘积显着降低 4% ( p < 0.05) 在操作过程中。腰部支撑垫有助于促进对称的座椅姿势，使用腰部支撑垫可以帮助挖掘机操作员在轮班时间提高生产力。