Jackleg drill operators are exposed to harmful levels of hand-arm vibration (HAV). Anti-vibration handles and gloves provide modest reductions in HAV exposures and forearm muscle exertion from the use of anti-vibration handles and gloves by jackleg drill operators. The goal of this pilot study was to investigate changes in HAV with the use of anti-vibration gloves and handles compared to forearm muscle exertion experienced by operators and measured with surface electromyography (EMG). Five subjects operated the drill under four different cases: no anti-vibration controls, anti-vibration gloves only, anti-vibration handle only, and simultaneous anti-vibration handle and glove use. Muscle exertion was expressed as a percent of maximum voluntary contraction (%MVC) and was compared using Welch’s ANOVA with Games-Howell post hoc comparisons. The case with both anti-vibration controls in use simultaneously (largest grip diameter) was associated with a mean %MVC of 36.13% during operation for all forearm muscles combined, which was significantly higher than that of the other cases (p < 0.05). There were no statistically significant differences in mean HAV exposures. The anti-vibration handle with anti-vibration glove case only increased the maximum allowable exposure time by 8 min as compared to the control case without any anti-vibration controls. These results suggest that the modest HAV exposure reductions from the use of anti-vibration handles and gloves may pale in comparison to the increased muscle exertion resulting from their use, and this trade-off among jackleg drill operators is a potential concern that warrants further investigation.

千斤顶钻机操作员会受到有害程度的手臂振动 (HAV) 影响。防振手柄和手套可适度减少直插式钻机操作员使用防振手柄和手套所造成的 HAV 暴露和前臂肌肉的劳累。这项试点研究的目的是调查使用防振手套和手柄时 HAV 的变化，与操作员经历的前臂肌肉用力并通过表面肌电图 (EMG) 测量进行比较。五名受试者在四种不同情况下操作演习：无防振控制、仅戴防振手套、仅防振手柄以及同时使用防振手柄和手套。肌肉用力表示为最大自主收缩的百分比 (%MVC)，并使用 Welch 方差分析与 Games-Howell 事后比较进行比较。同时使用两种抗振控制装置（最大握把直径）的病例与手术期间所有前臂肌肉的平均 %MVC 相关，为 36.13%，显着高于其他病例 ( p < 0.05)。平均 HAV 暴露没有统计学上的显着差异。与没有任何防振控制的控制箱相比，带有防振手套箱的防振手柄仅将最大允许暴露时间增加了 8 分钟。这些结果表明，与使用防振手柄和手套导致的肌肉消耗增加相比，使用防振手柄和手套所带来的 HAV 暴露的适度减少可能相形见绌，并且千斤顶钻机操作员之间的这种权衡是一个潜在的问题，值得进一步调查。