National Research Center for the Working Environment, Copenhagen, Denmark.
J Strength Cond Res. 2013 May;27(5):1202-9. doi: 10.1519/JSC.0b013e318267a1aa.
The aim of this study was to investigate the effectiveness of a worksite intervention using kettlebell training to improve postural reactions to perturbation and jump performance. This single-blind randomized controlled trial involved 40 adults (n = 40) from occupations with a high prevalence of musculoskeletal pain and discomfort (mean age 44 years, body mass index 23 kg·m, 85% women). A blinded examiner took measures at baseline and follow-up. Participants were randomly assigned to a training group-doing kettlebell swings 3 times a week for 8 weeks-or to a control group. The outcome measures were postural reactions to sudden perturbation and maximal countermovement jump height. Compared with the control group, the training group had a significant decreased stopping time after perturbation (-109 ms, 95% confidence interval [-196 to -21]). Jump height increased significantly in the training group (1.5 cm, 95% confidence interval [0.5 to 2.5]), but this was nonsignificantly different from control. Kettlebell training improves postural reactions to sudden perturbation. Future studies should investigate whether kettlebell training can reduce the risk of low back injury in occupations with manual material handling or patient handling where sudden perturbations often occur.
本研究旨在探究使用壶铃训练进行工作场所干预以改善姿势反应和跳跃表现的效果。这是一项单盲随机对照试验，涉及 40 名来自肌肉骨骼疼痛和不适患病率较高职业的成年人（n=40；平均年龄 44 岁，体重指数 23 kg·m，85%为女性）。一位盲法检查者在基线和随访时进行测量。参与者被随机分配到训练组（每周进行 3 次壶铃摆动，持续 8 周）或对照组。主要结局指标为姿势反应和最大反向跳跃高度。与对照组相比，训练组的姿势反应在受到干扰后明显缩短（-109 毫秒，95%置信区间[-196 至-21]）。训练组的跳跃高度显著增加（1.5 厘米，95%置信区间[0.5 至 2.5]），但与对照组相比差异无统计学意义。壶铃训练可改善对突发干扰的姿势反应。未来的研究应探讨壶铃训练是否可以降低在经常发生突发干扰的手动搬运或患者搬运职业中发生下腰痛的风险。
