A novel guideline for the analysis of linear acceleration mechanics - outlining a conceptual framework of 'shin roll' motion
A novel guideline for the analysis of linear acceleration mechanics - outlining a conceptual framework of 'shin roll' motion
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DOI：
10.1080/14763141.2022.2094827
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发表时间：
2022-07-10
影响因子：
2.2
通讯作者：
Willwacher, Steffen
中科院分区：
文献类型：
--
作者：
Alt, Tobias;Oeppert, Tom J.;Willwacher, Steffen
线性加速是一个关键的性能决定因素，也是许多运动的主要训练组成部分。尽管对下肢动力学和运动学进行了广泛的研究，但对不同的关键身体位置、潜在机制及其相关的运动策略缺乏一致的定义。这篇“方法和理论视角”文章的目的是介绍一个概念框架，该框架将加速冲刺期间矢状面“胫滚”运动分类。通过强调胫骨部分在空间中的方向的重要性，呈现了四个不同的关键位置（“胫骨阻挡”，“触地”，“脚跟锁定”和“推进姿势”），这些位置在摇摆姿势转换过程中由一个渐进的“胫骨滚动”运动联系在一起。胫骨向下倾斜是由三种不同的运动策略驱动的（“胫骨对齐”、“水平踝关节摇臂”和“胫骨下落”）。倾斜的最佳数量和时间将有助于通过及时的交错近端到远端功率输出实现机械有效的加速。需要从不同成绩水平和运动背景的运动员中获得经验数据来验证这一概念的可行性。本文提出的框架应该有助于未来的生物力学分析，并可能使教练和从业者制定具体的训练计划和反馈策略，为运动员提供更有效的加速技术。
Linear acceleration is a key performance determinant and major training component of many sports. Although extensive research about lower limb kinetics and kinematics is available, consistent definitions of distinctive key body positions, the underlying mechanisms and their related movement strategies are lacking. The aim of this 'Method and Theoretical Perspective' article is to introduce a conceptual framework which classifies the sagittal plane 'shin roll' motion during accelerated sprinting. By emphasising the importance of the shin segment's orientation in space, four distinctive key positions are presented ('shin block', 'touchdown', 'heel lock' and 'propulsion pose'), which are linked by a progressive 'shin roll' motion during swing-stance transition. The shin's downward tilt is driven by three different movement strategies ('shin alignment', 'horizontal ankle rocker' and 'shin drop'). The tilt's optimal amount and timing will contribute to a mechanically efficient acceleration via timely staggered proximal-to-distal power output. Empirical data obtained from athletes of different performance levels and sporting backgrounds are required to verify the feasibility of this concept. The framework presented here should facilitate future biomechanical analyses and may enable coaches and practitioners to develop specific training programs and feedback strategies to provide athletes with a more efficient acceleration technique.