Association of Sprint Performance With Ground Reaction Forces During Acceleration and Maximal Speed Phases in a Single Sprint
Association of Sprint Performance With Ground Reaction Forces During Acceleration and Maximal Speed Phases in a Single Sprint
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DOI：
10.1123/jab.2016-0356
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发表时间：
2018-04-01
影响因子：
1.4
通讯作者：
Fukunaga, Tetsuo
中科院分区：
文献类型：
--
作者：
Nagahara, Ryu;Mizutani, Mirai;Fukunaga, Tetsuo
我们的目的是澄清短跑性能的机械决定因素在加速和最大速度阶段的一个单一的短跑，使用地面反作用力（GRF）。当18名男性运动员进行60米短跑时，GRF在从开始的50米距离的每一步进行测量。在整个加速阶段的变量近似与四阶多项式。随后，以最大速度的55%、65%、75%、85%和95%的加速度以及最大速度阶段的跑步速度作为短跑成绩变量。在加速和最大速度阶段的地面反应脉冲和平均GRF被选为独立变量。逐步多元回归分析选择推进和制动脉冲作为加速的贡献者，分别为最大速度的55%-95%（β> 0.72）和75%-95%（β> 0.18）。此外，平均垂直力是最大跑步速度的贡献者（β = 0.48）。目前的研究结果表明，在整个加速阶段施加一个大的推进力，抑制制动力接近最大速度时，并在最大速度阶段产生一个大的垂直力是必不可少的实现更大的加速度和保持更高的最大速度，分别。
We aimed to clarify the mechanical determinants of sprinting performance during acceleration and maximal speed phases of a single sprint, using ground reaction forces (GRFs). While 18 male athletes performed a 60-m sprint, GRF was measured at every step over a 50-m distance from the start. Variables during the entire acceleration phase were approximated with a fourth-order polynomial. Subsequently, accelerations at 55%, 65%, 75%, 85%, and 95% of maximal speed, and running speed during the maximal speed phase were determined as sprinting performance variables. Ground reaction impulses and mean GRFs during the acceleration and maximal speed phases were selected as independent variables. Stepwise multiple regression analysis selected propulsive and braking impulses as contributors to acceleration at 55%-95% (beta > 0.72) and 75 %-95 % (13 > 0.18), respectively, of maximal speed. Moreover, mean vertical force was a contributor to maximal running speed (beta = 0.48). The current results demonstrate that exerting a large propulsive force during the entire acceleration phase, suppressing braking force when approaching maximal speed, and producing a large vertical force during the maximal speed phase are essential for achieving greater acceleration and maintaining higher maximal speed, respectively.