步行时中侧全身振动的影响,增加了认知负荷
Filippo Bertozzi1, Claudia Brunetti2, Flavia Marrone3
1E4Sport Lab, Politecnico di Milano, Lecco 23900, Italy.
Journal of biomechanics
|August 26, 2024
概括
横向全身振动 (WBV) 在低频率 (2 Hz) 上显著改变步态参数和下肢动力学. 认知反应不受影响,但生物力学适应发生在动态活动期间保持稳定.
科学领域:
- 生物力学 生物力学
- 人类因素工程 人类因素工程
- 职业健康 职业健康 职业健康
背景情况:
- 长时间暴露于全身振动 (WBV) 在职业环境中构成肌肉骨疾病的风险.
- 关于WBV在动态活动中的影响的研究有限,需要对其生物力学影响进行进一步的研究.
研究的目的:
- 研究不同水平WBV频率对步态参数,下肢动力学和健康个体认知反应的影响.
- 了解在WBV暴露期间使用的生物力学适应和稳定性控制策略.
主要方法:
- 40名健康的参与者在跑步机上行走,接受横向WBV (1 m/s2, 2-10 Hz).
- 使用运动捕捉记录了步行参数,并通过精神运动警觉测试评估了认知反应.
- 统计参数映射 (SPM) 分析了动力学数据,ANOVA评估了频率效应.
主要成果:
- 没有观察到WBV频率对反应时间的显著影响.
- 步行时空参数 (例如,减少步伐长度,增加步骤宽度) 和步行变异性发生在2 Hz时发生显著变化.
- 动力学分析显示了部,膝盖和脚运动的显著调整,特别是在2Hz,这表明了姿势控制的策略.
结论:
- 横向的WBV,特别是在像2Hz这样的较低频率下,会导致 significant biomechanical adaptations in gait and lower limb kinematics. 在步态和下肢动力学中产生显著的生物机械适应.
- 个人采用复杂的策略,包括增加中侧移位,以保持稳定性和姿势控制在扰乱的运动条件下.
- 这些发现强调了考虑WBV对人类运动和职业安全的频率相关影响的重要性.
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