Kinematic differences between front crawl sprint and distance swimmers at sprint pace
Kinematic differences between front crawl sprint and distance swimmers at sprint pace
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DOI：
10.1080/02640414.2010.523090
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发表时间：
2011-01-01
影响因子：
3.4
通讯作者：
Sanders, Ross
中科院分区：
文献类型：
--
作者：
McCabe, Carla B.;Psycharakis, Stelios;Sanders, Ross
本研究旨在利用三维方法来确定短跑速度与距离前爬泳运动员在短跑速度下是否存在明显的运动学差异。七名短跑专家和八名长跑专家在一个6.75立方米的校准空间内进行了四次25米短跑，由六台发电机锁定摄像机记录。感兴趣的变量是：平均游泳速度，划水长度，划水频率，上肢和脚位移，肘部角度，肩部和臀部滚动角度，划水阶段的持续时间，以及划水周期内相对于手进入的特定事件对应的时间。除了效应量计算外，还对每个变量进行了独立t检验，以评估短跑和长跑运动员之间的差异。冲刺和距离前爬泳运动员之间的差异通常很小，并且在以冲刺速度游泳时并不显着。差异仅限于中风周期的时间方面。这些研究结果表明，教练员不应该在技术发展方面对短跑和长跑专家进行不同的训练。
The purpose of this study was to use three-dimensional methods to determine whether there are distinct kinematic differences between sprint and distance front crawl swimmers when swimming at a sprint pace. Seven sprint and eight distance specialists performed four 25-m sprints through a 6.75-m3 calibrated space recorded by six gen-locked cameras. The variables of interest were: average swim velocity, stroke length, stroke frequency, upper limb and foot displacement, elbow angle, shoulder and hip roll angles, duration of stroke phases, and the time corresponding to particular events within the stroke cycle relative to hand entry. Differences between sprint and distance swimmers were assessed with an independent t-test for each variable, in addition to effect size calculations. Differences between sprint and distance front crawl swimmers were generally small and not significant when swimming at a sprint pace. Differences were limited to temporal aspects of the stroke cycle. These findings suggest that coaches should not train sprint and distance specialists differently in terms of technique development.