Quantifying freestyle kick-count and kick-rate patterns in Paralympic swimming
Quantifying freestyle kick-count and kick-rate patterns in Paralympic swimming
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DOI：
10.1080/02640410903062936
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发表时间：
2009-01-01
影响因子：
3.4
通讯作者：
Burkett, Brendan
中科院分区：
文献类型：
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作者：
Fulton, Sacha K.;Pyne, David B.;Burkett, Brendan
游泳速度是手臂划动和腿部打水产生的推进力的函数。踢腿在水下部分被遮挡，使得踢腿的运动学难以分析。在这项研究中，我们使用惯性传感器技术量化了 14 名残奥会游泳运动员的 100 米自由泳踢腿计数和踢腿频率模式。游泳试验中，游泳运动员踢了 145 +/- 39 次（平均值 +/- s），仅踢腿试验中，运动员踢了 254 +/- 74 次。踢球率为 124.9 +/- 20.3 踢球。 min(-1) 游泳试验和 129.6 +/- 14.0 踢腿。 min(-1) 仅用于踢腿试验。游泳试验中 25 米分段的踢腿次数没有显着差异。在第四个 25 米分段的仅踢腿试验中，踢腿次数大幅增加了 10.6% [90% 置信区间 (90% CI)：7.3 至 14.0%]。游泳试验（-12.0%；90% CI：-12.8 至 -11.1%）和仅踢腿试验（-7.3%；90% CI：-8.6 至 -5.9%）的踢腿率大幅下降。游泳和仅踢腿的踢腿速率之间的关系为 r = 0.67（0.55 至 0.76；P < 0.001）。踢腿时踢腿的时间模式仅与游泳时不同。增加打腿频率可以提高自由泳的表现。
Swimming speed is a function of the propulsion generated from arm strokes and leg kicks. Kicking is partially obscured underwater, making the kinematics of the kick difficult to analyse. In this study, we quantified 100-m freestyle kick-count and kick-rate patterns for 14 Paralympic swimmers using inertial-sensor technology. Swimmers took 145 +/- 39 kicks (mean +/- s) for swimming trials and 254 +/- 74 kicks for kicking-only trials. Kick rate was 124.9 +/- 20.3 kicks . min(-1) for swimming trials and 129.6 +/- 14.0 kicks . min(-1) for kicking-only trials. There were no marked differences in kick count among 25-m segments in the swimming trials. There was a substantial increase of 10.6% [90% confidence interval (90% CI): 7.3 to 14.0%] in the number of kicks in the kicking-only trials by the fourth 25-m segment. There was a substantial decrease in kick rate by the third 25-m segment for swimming (-12.0%; 90% CI: -12.8 to -11.1%) and kicking-only (-7.3%; 90% CI: -8.6 to -5.9%) trials. The relationship between swimming and kicking-only kick rates was r = 0.67 (0.55 to 0.76; P < 0.001). The temporal patterns of the kick in kicking only differed from those in swimming; increases in kick rate can improve freestyle swimming performance.