THE THREE-DIMENSIONAL KINEMATICS OF A BARBELL DURING THE SNATCH OF TAIWANESE WEIGHTLIFTERS
THE THREE-DIMENSIONAL KINEMATICS OF A BARBELL DURING THE SNATCH OF TAIWANESE WEIGHTLIFTERS
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DOI：
10.1519/jsc.0b013e3181db23f4
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发表时间：
2010-06-01
影响因子：
3.2
通讯作者：
Cheng, Kuangyou B.
中科院分区：
文献类型：
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作者：
Chiu, Hung-Ta;Wang, Chih-Hung;Cheng, Kuangyou B.
邱海涛，王长程，程国强。台湾举重运动员抓举时杠铃的三维运动。[J]力量杂志24(6):1520-1526,2010-本研究的目的是表征杠铃的运动轨迹，并阐明每个举重运动员的杠铃运动轨迹是否有一个标准模式。采用两台高速摄像机（超高速MS1000，采样率为120hz）拍摄台湾男子举重运动员在竞技条件下的杠铃运动轨迹。拍摄24例成功举重者，按相对杠铃质量（RBM）分为3组（n = 8 /组）：表现较好的组（RBM bb0 1.63），中等组（1.28 < RBM < 1.63），表现较差组（RBM, 1.28）。结果表明，有3个水平变量（杠铃过膝时的水平位置、弹射距离、杠铃最高位置时的水平速度）和3个垂直变量（杠铃最大垂直高度、接球位置高度归一化后的最大高度）。3组杠铃动作矢状面从最大高度到抓球位置的垂直位移均有显著差异（p < 0.05）。在之前的研究中，表现较好的组的杠铃垂直运动范围（19.5 +/- 1.9 cm）比男性举重运动员的结果（约10-14 cm）更大。尽管杠铃在垂直方向上的运动模式是相似的，但由于水平运动的不同，每个举重运动员似乎没有一个标准的运动轨迹。这项研究的结果表明，举重运动员可能会被指示在力量较弱（如女性举重运动员）或杠铃质量较重的情况下，降低水平速度并增加杠铃的垂直运动范围以抓住它。
Chiu, HT, Wang, CH, Cheng, KB. The Three-Dimensional Kinematics of a Barbell During the Snatch of Taiwanese Weightlifters. J Strength Cond Res 24(6): 1520-1526, 2010-The purpose of this study is to characterize the trajectory of a barbell and clarify whether there is a standard pattern in the barbell trajectory for each lifter. Two high-speed cameras (mega-speed MS1000, sampling rate = 120 Hz) were used to film the barbell trajectories of male Taiwanese weightlifters under competitive conditions. Twenty-four successful lifts were filmed and classified into 3 groups (n = 8 per group) by relative barbell-mass (RBM): the better-performance group (RBM > 1.63), the middle group (1.28 < RBM < 1.63), and the worse-performance group (RBM, 1.28). The results indicate that 3 horizontal (the horizontal position of the barbell at clearing the knee of the lifter, projectile range, and the horizontal velocity of the barbell at its highest position) and 3 vertical variables (the barbell's maximum vertical height, the maximum height normalized by the height of the catch position, and the vertical displacement from the maximum height to the catch position) of the barbell movements in the sagittal plane were significantly different in the 3 groups (p < 0.05). A greater vertical travel range of the barbell (19.5 +/- 1.9 cm) was found for the better-performance group than for the results of male weightlifters (about 10-14 cm) in previous studies. Although the barbell movement patterns in the vertical direction were similar, there seemed to be no standard trajectory for each weightlifter because of the variation in horizontal movements. The results of this study suggest that weightlifters may be instructed to reduce horizontal velocity and increase the vertical travel range of the bar to catch it under the conditions of less strength (as in female lifters) or heavier barbell mass.