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Does the Modification of Ball Mass Influence the Types of Attempted and Successful Shots in Youth Basketball?

机译：球质量的改变会影响青少年篮球尝试射门和成功射门的类型吗？

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Purpose. This study aimed at determining: (a) whether the effect of modifying ball mass allowed youth basketball players to attempt a greater number of lay-ups and hook shots during real games, and (b) whether the modification affected successful shots. Methods. Fifty-four boys from six basketball teams, aged between 10-11 years, participated in the study. The independent variable was ball mass and the dependent variable was the attempted and successful type of shots (set and jump shot, lay-ups, and hook shot). We established three situations in which four games were played with each of the following balls: (a) a regulation ball, (b) a ball of smaller mass (440 g), and (c) a ball of greater mass (540 g). Four observers were trained (intra- and inter-observer reliability > 0.96). Four observers recorded the data utilizing a systematized register from observation of the game videos. Results. A higher percentage of lay-ups were attempted with the 440-g ball in comparison with the regulation ball (U = 227906, p = 0.01, ES = 0.152) and with the 540-g ball (U = 218614, p = 0.01, ES = 0.160). A higher percentage of lay-ups were successful with the 440-g ball in comparison to the 540-g ball (U = 223080, p = 0.02, ES = 0.210). Conclusions. Only attempted lay-ups increased with the 440-g ball in comparison to the regulation ball, but the percentage of the rest of kinds of attempted shots and successful shots were similar when comparing the modified balls to the regulation ball.
机译：目的。这项研究旨在确定：（a）改变球的质量是否使青少年篮球运动员在真实比赛中能够尝试更多的上篮和勾手投篮，以及（b）改变是否影响成功投篮。方法。来自六个篮球队的五十四个男孩，年龄在10-11岁之间，参加了这项研究。自变量是球的质量，因变量是投篮的尝试和成功类型（设置和跳投，上篮和勾手投篮）。我们确定了以下三种情况，其中下列每个球都进行了四场比赛：（a）调节球，（b）质量较小的球（440 g），以及（c）质量较大的球（540 g） 。培训了四名观察员（观察员之间和观察员之间的可靠性> 0.96）。四个观察员利用系统化的寄存器从比赛视频的观察中记录了数据。结果。与标准球（U = 227906，p = 0.01，ES = 0.152）和540-g球（U = 218614，p = 0.01，440-g球相比，尝试上篮的百分比更高ES = 0.160）。与540克球相比，440克球的上篮成功率更高（U = 223080，p = 0.02，ES = 0.210）。结论。与标准球相比，只有440克球的尝试上篮次数有所增加，但是将改良球与规则球进行比较时，其余尝试投篮和成功投篮的百分比相似。

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