PDF(Pubmed)
Abstract：
Sports-related concussions are caused by one substantial impact or several smaller-magnitude impacts to the head or body that lead to an acceleration of the head, causing shaking of the brain. Athletes with a history of sports-related concussion demonstrate lower-extremity biomechanics during landing tasks that are conducive to elevated injury risk. However, the effect of head acceleration on lower-extremity biomechanics during landing tasks is unknown. Twenty participants were evenly separated into a vertical hopping group and a lateral hopping group. Participants performed several land-and-cut maneuvers before and after a hopping intervention. Vertical head acceleration (g) was measured via an accelerometer during the hopping interventions. Comparisons in head acceleration during the hopping tasks were made between groups. Additionally, kinematic and kinetic variables were compared pre- and post-intervention within groups as well as post-intervention between groups. The vertical hopping group demonstrated greater vertical head acceleration compared to the lateral hopping group (p = 0.04). Additionally, the vertical hopping group demonstrated greater knee abduction angles during landing post-intervention compared to the lateral hopping group (p < 0.000). Inducing head acceleration via continuous hopping had an influence on lower-extremity biomechanics during a landing task.
摘要：
与运动相关的脑震荡是由对头部或身体的一次重大撞击或几次较小的撞击导致头部加速引起的，导致大脑颤抖。有运动相关脑震荡病史的运动员在着陆任务中表现出下肢生物力学，这有助于增加受伤风险。然而,着陆任务中头部加速度对下肢生物力学的影响尚不清楚.将20名参与者均匀分为垂直跳跃组和横向跳跃组。参与者在跳跃干预前后进行了几次土地和切割操作。在跳跃干预期间通过加速度计测量垂直头部加速度(g)。组间比较了跳跃任务期间的头部加速度。此外,比较了组内干预前后以及组间干预后的运动学和动力学变量.与横向跳跃组相比，垂直跳跃组显示出更大的垂直头部加速度（p=0.04）。此外,与横向跳跃组相比,垂直跳跃组干预后着陆时膝关节外展角度更大(p<0.000).在着陆任务期间，通过连续跳跃引起头部加速度会影响下肢生物力学。
