Effects of coaches' timeouts on basketball teams' offensive and defensive performances according to momentary differences in score and game period
Effects of coaches' timeouts on basketball teams' offensive and defensive performances according to momentary differences in score and game period
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DOI：
10.1080/17461391.2010.512366
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发表时间：
2011-01-01
影响因子：
3.2
通讯作者：
Sampaio, Jaime
中科院分区：
文献类型：
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作者：
Gomez, Miguel A.;Jimenez, Sergio;Sampaio, Jaime
本研究旨在探讨暂停对篮球队攻守表现之影响，并以得分与比赛时间之差异为依据。样本包括144个暂停注册在18场篮球比赛中随机选择的2007年欧洲篮球锦标赛（西班牙）。对于每次暂停，在暂停之前（n = 493）和暂停之后（n = 475）登记了五次控球。进攻和防守效率在比赛的前35分钟和最后5分钟都有记录。k-means聚类分析根据瞬时得分状态将超时分类如下：输（-10至-3分），平衡（-2至3分）和赢（4至10分）。重复测量方差分析确定了统计学显着的主要影响前和后超时进攻和防守的价值观。对比赛时间的卡方分析表明，与前35分钟相比，比赛最后5分钟的暂停百分比更高（64.9 +/- 9.1% vs. 35.1 +/- 10.3%;卡方（2）= 5.4，P
The aim of the present study was to assess the effects of game timeouts on basketball teams' offensive and defensive performances according to momentary differences in score and game period. The sample consisted of 144 timeouts registered during 18 basketball games randomly selected from the 2007 European Basketball Championship (Spain). For each timeout, five ball possessions were registered before (n = 493) and after the timeout (n = 475). The offensive and defensive efficiencies were registered across the first 35 min and last 5 min of games. A k-means cluster analysis classified the timeouts according to momentary score status as follows: losing (-10 to -3 points), balanced (-2 to 3 points), and winning (4 to 10 points). Repeated-measures analysis of variance identified statistically significant main effects between pre and post timeout offensive and defensive values. Chi-square analysis of game period identified a higher percentage of timeouts called during the last 5 min of a game compared with the first 35 min (64.9 +/- 9.1% vs. 35.1 +/- 10.3%; chi(2) = 5.4, P