Button Chris, MacLeod Morven, Sanders Ross, Coleman Simon
Department of Physical Education, University of Edinburgh.
Res Q Exerc Sport. 2003 Sep;74(3):257-69. doi: 10.1080/02701367.2003.10609090.
The analysis of variability both within and between performers can reveal important information about how athletes satisfy situational constraints. Transitory changes in the basketball free-throw shot were examined across different stages in skill development. Six female basketball players were selected, representing a range of playing expertise (pretest: 0-90% baskets scored). Each participant was video recorded performing 30 shots. Contrary to predictions, there was not a clear pattern of a reduction in trajectory variability with increasing skill level. However, improvements in skill level were associated with an increasing amount of intertrial movement consistency from the elbow and wrist joints. It is suggested that the angular motions of the elbow and wrist joints were compensated for each other toward the end of each throw to adapt to subtle changes in release parameters of the ball.
对运动员内部和之间的变异性进行分析，可以揭示有关运动员如何满足情境限制的重要信息。研究了篮球罚球在技能发展不同阶段的短暂变化。挑选了六名女性篮球运动员，代表了一系列的比赛专业水平（预测试：投篮命中率0-90%）。每位参与者进行30次投篮时都被录像。与预测相反，随着技能水平的提高，轨迹变异性并没有明显的降低模式。然而，技能水平的提高与肘部和腕关节每次试验间运动一致性的增加有关。研究表明，在每次投篮接近结束时，肘部和腕关节的角向运动相互补偿，以适应球出手参数的细微变化。
