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首页> 外文期刊>Journal of science and medicine in sport >A longitudinal evaluation of anthropometric and fitness characteristics in junior rugby league players considering playing position and selection level
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A longitudinal evaluation of anthropometric and fitness characteristics in junior rugby league players considering playing position and selection level

机译：考虑播放位置和选择级别的初级橄榄球联盟球员中的人体测量和健身特性的纵向评价

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Objectives: The current study provided a longitudinal evaluation of the anthropometric and fitness characteristics in junior rugby league players across three annual-age categories (i.e., under 13s, 14s and 15s) considering playing position and selection level. Design: Longitudinal design. Methods: Eighty-one junior rugby league players selected to a talent development programme were tracked over a two year period. Anthropometric (height, sitting height, body mass and sum of four skinfolds) and fitness (lower and upper body power, speed, change of direction speed and maximal aerobic power) characteristics were measured on three occasions (i.e., under 13s, 14s and 15s). Repeated measures multivariate analysis of variance (MANOVA) and multivariate analysis of covariance (MANCOVA; controlling chronological and maturational age) analysed changes across annual-age categories in relation to playing position and selection level. Results: Findings identified significant improvements in anthropometric and fitness characteristics across annual-age categories (p< 0.001). MANOVA and MANCOVA analysis identified significant overall effects for playing position (p< 0.001) and selection level (p< 0.05) throughout the two year period. Interactions between playing position and time were identified for height, vertical jump and estimated V ?O2max (p< 0.05). Selection level by time interactions were identified for 20. m, 30. m and 60. m sprint (p< 0.05). Conclusions: This study demonstrates the improvement of anthropometric and fitness characteristics within junior representative rugby league players. Interactive effects for playing position and selection level by time highlight the variation in the development of characteristics that occur during adolescence. Tracking the progression of characteristics longitudinally during adolescence, instead of at one-off time points, may assist selection and/or performance assessments within rugby league and other youth sport contexts.
机译：目前的研究提供了在考虑扮演位置和选择级别的三个年龄类别（即，13s，14s和15s）的初级橄榄球联盟球员中的人类测量和健身特性的纵向评估。设计：纵向设计。方法：在两年内，履行了八十一少年橄榄球联盟球员，在两年内被追踪了人才发展计划。三次测量人类测量（高度，坐姿，体积，四个肤质的体重和四个腕带的速度，方向速度，方向速度和最大好氧功率）特性）。反复措施对变异性的多元分析（MANOVA）和协方差的多元分析（MANCOVA;控制时间和成熟年龄）分析了与播放位置和选择级别的年龄类别的变化。结果：调查结果确定年龄类别类别（P <0.001）中的人类测量和健身特性的显着改善。 MANOVA和MANCOVA分析确定了在整个两年内的播放位置（P <0.001）和选择级别（P <0.05）的显着整体效果。识别播放位置和时间之间的相互作用，用于高度，垂直跳跃和估计V？O2max（P <0.05）。通过时间相互作用的选择级别为20. m，30. m和60. m sprint（p <0.05）。结论：本研究表明，在初级代表橄榄球联盟球员中提高了人类测量和健身特征。播放位置和选择级别的交互式效果突出了开发青春期期间发生的特征的变化。在青春期纵向跟踪特征的进展，而不是在一次性时间点，可以帮助橄榄球联盟和其他青年体育背景中的选择和/或性能评估。

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