Washington Wizards Athlete Care Department, Washington, DC 20004, USA.
UCAM Research Center for High Performance Sport, Catholic University of Murcia, 30107 Murcia, Spain.
Int J Environ Res Public Health. 2021 Mar 22;18(6):3259. doi: 10.3390/ijerph18063259.
Basketball is a game of repeated jumps and sprints. The objective of this study was to examine whether repeated jump assessments the day prior to competition (MD-1) could discriminate between fast and slow in-game performances the following day. Seven NCAA Division I Basketball athletes (4 guards and 3 forwards; 20 ± 1.2 years, 1.95 ± 0.09 m, and 94 ± 15 kg) performed a repeated-hop test on a force platform before and after each practice MD-1 to assess Reactive Strength Index (RSI) and Jump Height (JH). Peak speed was recorded during games via spatial tracking cameras. A median split analysis classified performance into FAST and SLOW relative to individual in-game peak speed. Paired -tests were performed to assess post- to pre-practices differences. An independent sample -test was used to assess the differences between FAST and SLOW performances. Cohen's d effect sizes (ES) were calculated to determine the magnitude of the differences. Statistical significance was set for ≤ 0.05. Post-practice RSI and JH were significantly higher than pre-training values prior to the FAST but not the SLOW in-game performances. A significant difference was found for MD-1 RSI when comparing FAST and SLOW conditions ( = 0.01; ES = 0.62). No significant between-group differences were obtained in JH ( = 0.07; ES = 0.45). These findings could have implications on the facilitation of reactive strength qualities in conjunction with match-play. Practitioners should evaluate the placement of stimuli to potentiate athlete readiness for competition.
篮球是一项反复跳跃和冲刺的运动。本研究的目的是检验在比赛前一天进行重复跳跃评估（MD-1）是否可以区分次日比赛中的快速和慢速表现。7 名 NCAA 一级篮球运动员（4 名后卫和 3 名前锋；20 ± 1.2 岁，1.95 ± 0.09 m，94 ± 15 kg）在每次练习 MD-1 前后在力量平台上进行了重复跳跃测试，以评估反应强度指数（RSI）和跳跃高度（JH）。通过空间跟踪摄像机在比赛中记录峰值速度。中位数分割分析将表现相对于个体比赛中的峰值速度分为 FAST 和 SLOW。进行配对检验以评估练习后与练习前的差异。使用独立样本检验评估 FAST 和 SLOW 表现之间的差异。计算 Cohen's d 效应量（ES）以确定差异的大小。设定统计显著性为 ≤ 0.05。在 FAST 比赛中，练习后的 RSI 和 JH 明显高于训练前的值，但在 SLOW 比赛中则不然。在比较 FAST 和 SLOW 条件时，MD-1 RSI 存在显著差异（ = 0.01；ES = 0.62）。在 JH 中未发现组间差异（ = 0.07；ES = 0.45）。这些发现可能对结合比赛促进反应强度素质产生影响。从业者应评估刺激的放置位置，以增强运动员的比赛准备状态。
