Kinetic Sprint Asymmetries on a non-motorised Treadmill in Rugby Union Athletes
Kinetic Sprint Asymmetries on a non-motorised Treadmill in Rugby Union Athletes
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DOI：
10.1055/s-0043-117607
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发表时间：
2017-11-01
影响因子：
2.5
通讯作者：
Morin, Jean-Benoit
中科院分区：
文献类型：
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作者：
Brown, Scott R.;Cross, Matt R.;Morin, Jean-Benoit
本研究的目的是在加速和最大速度（v（max））冲刺过程中，短跑动力学（垂直[F（V）]和水平力[F（H）]）不对称性与运动成绩之间存在潜在联系。30名未受伤的男性橄榄球运动员在非机动跑步机上进行8秒短跑。动力学数据被分为强'和弱'腿的基础上，个别平均峰值在短跑过程中观察到的，并进行分析，以评估不对称性。在加速过程中，强腿和弱腿之间的F（H）存在较大差异（4.3 vs. 3.5Nkg（-1））和v（max）（3.7 vs. 2.8Nkg（-1））短跑（两个ES=1.2），但F（V）中没有（分别为21.8 vs. 20.8Nkg（-1），加速ES=-0.6; 23.9 vs. 22.8Nkg（-1），v（max）ES=-0.5）。在加速（1.6 vs. 6.8%）和v（max）（1.6 vs. 8.2%）期间，F（V）的组平均不对称性低于F（H）。与F（H）（0.2-28%）相比，F（V）（0.03-4.3%）的不对称范围要低得多。在未受伤的橄榄球运动员中，F（H）中的不对称分数的大小和范围，发生在加速和v（max）阶段，其中远大于F（V）中发现的那些。这些发现强调了一些未受伤的运动员拥有动力学不对称的潜力，这是短跑加速性能的关键组成部分。
The purpose of this study was to present a potential link between sprint kinetic (vertical [F (V) ] and horizontal force [F (H) ]) asymmetries and athletic performance during acceleration and maximal velocity (v (max) ) sprinting. Thirty un-injured male rugby athletes performed 8-s sprints on a non-motorised treadmill. Kinetic data were divided into strong' and weak' legs based on individually averaged peak values observed during sprinting and were analysed to evaluate asymmetry. Large differences were found between the strong and weak legs in F (H) during acceleration (4.3 vs. 3.5Nkg (-1) ) and v (max) (3.7 vs. 2.8Nkg (-1) ) sprinting (both ES=1.2), but not in F (V) (21.8 vs. 20.8Nkg (-1) , ES=-0.6 for acceleration; 23.9 vs. 22.8Nkg (-1) , ES=-0.5 for v (max) , respectively). Group mean asymmetry was lower in F (V) compared to F (H) during acceleration (1.6 vs. 6.8%) and v (max) (1.6 vs. 8.2%). The range of asymmetry was much lower in F (V) (0.03-4.3%) compared to F (H) (0.2-28%). In un-injured rugby athletes, the magnitude and range of asymmetry scores in F (H) , occurring during acceleration and v (max) phases, where much greater than those found in F (V) . These findings highlight the potential for some un-injured athletes to possess kinetic asymmetries known as crucial components for acceleration performance in sprinting.