The regulation of release parameters in underarm precision throwing
The regulation of release parameters in underarm precision throwing
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腋下精准投掷释放参数的调控
DOI：
10.1080/02640410050074304
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发表时间：
2000
影响因子：
3.4
通讯作者：
H. Ripoll
中科院分区：
文献类型：
--
作者：
Marie A. Dupuy;Denis Mottet;H. Ripoll
这项研究的目的是确定成年人是否自发地利用物理定律，以实现更好的准确性时，投掷在不同的距离。八名成年人进行了25次腋下投掷在五个水平的圆形目标位于4，5，6，7和8米远的恒定的5%的相对精度要求。结果发现，随着投掷距离的增加，球的角度和速度增加，而释放点的坐标没有明显变化。这些结果支持的想法，人们最大限度地减少影响距离的变化，通过调整的角度和速度在球释放后的机械最佳物理定律预测。此外，距离的变化被认为是小于预期的，因为在球释放的角度和速度的独立变化。因此，控制精确投掷似乎意味着补偿性的变化，经常报告在控制熟练的行动。
The aim of this study was to determine if adults spontaneously exploit the laws of physics to achieve better accuracy when throwing at various distances. Eight adults performed 25 underarm throws at five horizontal circular targets located 4, 5, 6, 7 and 8 m away with a constant 5% relative accuracy requirement. Angle and speed of the ball at release were found to increase with throwing distance, while the coordinates of the release point did not change significantly. These results support the idea that people minimize the variability in impact distance by adapting both the angle and the speed at ball release following a mechanical optimum predicted by the laws of physics. Moreover, variability in distance was found to be less than expected because of independent variations in the angle and speed at ball release. Hence, the control of precision throwing seems to imply compensatory variability, as frequently reported in the control of skilled actions.