School of Physical Education and Sport, University of São Paulo, Brasil.
Percept Mot Skills. 2012 Aug;115(1):300-8. doi: 10.2466/06.05.25.PMS.115.4.300-308.
Efficiency in front-crawl stroke has been inferred primarily by means of the analysis of arm actions, specifically, stroke frequency and stroke length. The objective of the present study was to investigate whether swimming efficiency could be better assessed in children still learning the front-crawl stroke by analyzing the movement pattern as a whole. Forty-two children enrolled in private swimming programs volunteered to participate in the study. The task consisted of swimming 30 m as fast as possible. Three experts analyzed the movement pattern of the participants using a checklist. Both stroke frequency and stroke length were calculated. The correlation coefficients between the time taken to swim and both the stroke frequency and stroke length were not significant, but the total and components of the checklist scores were. Results indicate that the swimming efficiency of children learning the front-crawl stroke can be better assessed by analyzing their whole movement pattern.
效率在自由泳泳姿中主要通过手臂动作的分析来推断，具体来说，就是划频和划幅。本研究的目的是通过整体分析运动模式，探究对于正在学习自由泳泳姿的儿童，游泳效率是否可以通过更优的方式进行评估。42 名参加私人游泳课程的儿童自愿参与了本研究。任务是尽可能快地游 30 米。三位专家使用检查表分析了参与者的运动模式。划频和划幅都被计算在内。游泳时间与划频和划幅之间的相关系数均不显著，但总得分和检查表各项得分的相关系数显著。结果表明，通过分析儿童整体的运动模式，他们学习自由泳泳姿的效率可以得到更好的评估。
