Laboratoire Motricite, Interactions, Performance, Universite de Nantes, UFR STAPS, 25 bis Boulevard Guy Mollet, Nantes Cedex 3, France.
J Sports Sci. 2010 Feb;28(3):349-58. doi: 10.1080/02640410903503640.
In this article, we examine the space-time coordination dynamics of two basketball teams during competition. We identified six game sequences at random, from which the movement data of each player were obtained for analysis of team behaviours in both the longitudinal (basket-to-basket) and lateral (side-to-side) directions. The central position of a team was measured using its spatial (geometric) centre and dispersion using a stretch index, obtained from the mean distance of team members from the spatial centre. Relative-phase analysis of the spatial centres demonstrated in-phase stabilities in both the longitudinal and lateral directions, with more stability in the longitudinal than lateral direction. As anticipated, this finding is consistent with the results of an analysis of individual playing dyads (see companion article, this issue), as well as the more general principle of complex systems conforming to similar descriptions at different levels of analysis. Phase relations for the stretch index demonstrated in-phase attraction in the longitudinal direction and no attraction to any values in the lateral direction. Finally, the difference between the two stretch indexes at any instant showed phase transitions between two stable patterns when the difference was represented in binary form. This result is attributed to the reciprocity between teams in their amounts of expansion and contraction when possession of the ball is won and lost.
在本文中，我们研究了两支篮球队在比赛中的时空协调动力学。我们随机选择了六个比赛序列，从中获取每个球员的运动数据，以分析球队在纵向（篮筐到篮筐）和横向（一侧到另一侧）方向上的行为。使用空间（几何）中心和伸展指数来测量球队的中心位置，伸展指数是通过球队成员与空间中心的平均距离获得的。空间中心的相对相位分析表明，在纵向和横向方向上都存在同相稳定性，纵向方向的稳定性高于横向方向。正如预期的那样，这一发现与对个体比赛二人组的分析结果（见本期的相关文章）以及复杂系统在不同分析层次上符合类似描述的更一般原则是一致的。伸展指数的相位关系表明，在纵向方向上存在同相吸引，而在横向方向上没有任何吸引力。最后，当以二进制形式表示时，两个伸展指数之间的差异在任何时刻都表现出两个稳定模式之间的相变。这一结果归因于球队在赢得和失去球权时扩张和收缩的相互作用。
