Twenty participants (18 males and 2 females) completed postural stability assessments before and after 4-h exposure to whole body vibration (WBV) in four experimental conditions: (a) vertical-dominant WBV with vertical passive air suspension, (b) multi-axial WBV with vertical passive air suspension, (c) multi-axial WBV with multi-axial active suspension, and (d) no WBV condition. Center of pressure (COP)-based postural sway measures significantly increased following multi-axial WBV exposure. Increase in COP velocity and displacement following multi-axial WBV was significantly higher than the increase in all the other exposure conditions. However, no significant differences between the WBV conditions were observed in functional limits of stability and anticipatory postural adjustments. While our results show standing balance to be impaired following the multi-axial WBV exposure of off-road mining vehicles, dynamic stability across a broader range of conditions needs to be understood to causally link postural stability decrements to increased fall-risks associated with off-road vehicle operators.

20名参与者（男18名，女2名）在四种实验条件下暴露于全身振动（WBV）4小时之前和之后完成了姿势稳定性评估：（a）垂直为主的WBV，带有垂直被动空气悬架，（b）多位具有垂直被动空气悬架的轴向WBV，（c）具有多轴主动悬架的多轴WBV和（d）无WBV条件。在多轴WBV暴露后，基于压力中心（COP）的姿势摇摆措施明显增加。多轴WBV后COP速度和位移的增加明显高于所有其他暴露条件下的增加。但是，在稳定性和预期姿势调整的功能极限方面，未观察到WBV条件之间的显着差异。