A three-dimensional cinematographical analysis of the volleyball spike.
A three-dimensional cinematographical analysis of the volleyball spike.
复制标题
排球扣球的三维电影分析。
DOI：
10.1080/02640419308729999
复制
发表时间：
1993
影响因子：
3.4
通讯作者：
S. R. Northcott
中科院分区：
文献类型：
--
作者：
S.G.S. Coleman;A. Benham;S. R. Northcott
本研究的目的是描述排球运动员在高水平比赛中的扣球动作，并研究扣球技术中上肢、下肢和全身运动学变量与冲击后球速度的相互关系。在第十六届世界大学生运动会（1991年世界大学生运动会）上，使用两台光电生物力学500电影摄像机，以100hz的名义帧率拍摄了10名男子国际排球高级运动员的扣球动作。利用DLT算法和拍摄体中的一组标定点获得数字化图像坐标中的三维目标空间坐标。研究了起跳时下肢角运动学、起跳时质心垂直速度和起跳时质心垂直位移（起跳高度）之间的关系。还确定了击球臂的角运动学与击球后球速度之间的关系。起飞时平均（+/- S.E.）质心垂直速度为3.59 +/- 0.05 m s-1，平均起跳高度为0.62 +/- 0.02 m。正如预期的那样，起飞时质心垂直速度的平方与跳跃高度之间存在显著的相关性（r = 0.78; P < 0.01）。下肢角运动学与起跳高度质心垂直速度之间无显著相关性。撞击后球平均速度为27.0±0.9 m s-1，与右肱骨最大角速度显著相关（r = 0.75, P < 0.01）。（摘要删节250字）
The objectives of this study were to describe the volleyball spiking actions used by players in top-level competition, and also to examine the interrelationships between upper limb, lower limb and whole body kinematic variables, and post-impact ball speed in the spiking technique. Two Photosonics Biomechanics 500 cine-cameras operating at a nominal frame rate of 100 Hz were used to film the spiking actions of 10 male senior international volleyball players at the XVI Universiade (1991 World Student Games). Three-dimensional object space co-ordinates of digitized image co-ordinates were obtained using a DLT algorithm and an array of calibration points in the filmed volume. Relationships between lower limb angular kinematics at take-off, centre of mass vertical velocity at take-off and centre of mass vertical displacement (jump height) were examined. Relationships between angular kinematics of the hitting arm and post-impact ball speed were also determined. The mean (+/- S.E.) centre of mass vertical velocity at take-off was 3.59 +/- 0.05 m s-1 and the mean height jumped was 0.62 +/- 0.02 m. As expected, a significant correlation was found between the square of the centre of mass vertical velocity at take-off and jump height (r = 0.78; P < 0.01). No significant correlations were found between lower limb angular kinematics and centre of mass vertical velocity at take-off or jump height. The mean post-impact ball speed was 27.0 +/- 0.9 m s-1, and this was significantly correlated to maximum right humerus angular velocity (r = 0.75; P < 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)