Biomechanical analysis of circles on pommel horse
Biomechanical analysis of circles on pommel horse
复制标题
鞍马转圈的生物力学分析
DOI：
10.1080/14763140802629974
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发表时间：
2009
影响因子：
2.2
通讯作者：
P. Gervais
中科院分区：
文献类型：
--
作者：
T. Fujihara;T. Fuchimoto;P. Gervais
本研究的目的是分析圆的主要力学。17名大学男子体操运动员在装有仪器的鞍马模型上表演圆圈，该模型使鞍马反作用力能够在1000 Hz下用两个测力板记录。还使用两台每秒60帧的数码摄像机对这些圆圈进行了录像。在循环过程中，垂直分量的反作用力在双手支撑阶段达到峰值。质心速度的变化对应于水平反作用力切向分量的变化。质心速度在单手支撑阶段有峰值，在双手支撑阶段有局部极小值。踝关节的速度和头部和躯干的质心的速度在单手支撑阶段是最小的，在双手支撑阶段是最大的。这些结果表明，这些圆圈是由垂直运动和两种旋转组成的：质心的旋转和身体本身绕质心的旋转。这两种转动都是相位相关的，它们影响着腿的转动速度。研究鞍马运动中不同方位的圆，有助于加深对圆的认识。
The aim of this study was to analyse the principal mechanics of circles. Seventeen university male gymnasts performed circles on an instrumented pommel horse model that enabled the pommel reaction forces to be recorded at 1000 Hz with two force plates. The circles were also videotaped using two digital video cameras operating at 60 frames per second. During circles, the vertical component of the reaction forces peaked in the double-hand support phases. Changes in the velocity of the centre of mass corresponded to the change in the tangential components of horizontal reaction forces. The velocity of the centre of mass had its peaks in the single-hand support phases and its local minimums in the double-hand support phases. The velocity of the ankles and that of the centre of mass of the head and trunk were minimal in the single-hand support phases and were maximal in the double-hand support phases. These results suggest that the circles were composed of vertical movements and two kinds of rotations: rotation of the centre of mass and rotation of the body itself about the centre of mass. These two kinds of rotations, which influence the legs' rotational velocity, are phase dependent. To further our understanding of circles, research on circles in different orientations on the pommel horse will be beneficial.