Selection of reference data significantly influences biological maturity timing classification in national youth soccer players

IF 1.5 4区 教育学 Q3 HOSPITALITY, LEISURE, SPORT & TOURISM
Liam Sweeney, Áine MacNamara, Jamie Taylor, Tommy R Lundberg
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Abstract

This study investigated biological maturity timing (BMT) in 116 Irish U13 and 958 Swedish U15 male national soccer players using various growth reference datasets. BMT was expressed as a Z-score comparing each player's percentage of predicted adult height (%PAH) to age-specific means and standard deviations reported in the: Berkeley Growth Longitudinal (US), UK 1990 growth reference (UK), and Swedish 2000s growth reference (SWE) studies. Multinomial logistic regression was used to compare BMT classification (Early, On-time, Late) between datasets. One-sampled means t-tests were used to examine BMT-related maturity biases per cohort and reference dataset. For both Swedish U15 ( p < 0.001) and Irish U13 ( p = 0.003) players, BMT classification was significantly influenced by the selection of the growth reference dataset. Only 61% of players had the same BMT category across all reference datasets. Significant maturity biases existed in favour of early maturing Swedish players (mean = 96.5%PAH) in all datasets, although moderate using SWE ( d = 0.7), large using UK ( d = 1.02), and very large using US ( d = 1.36) (all p < 0.001). Small significant maturity biases existed in favour of early maturing Irish players (mean = 87.1%PAH) using UK ( p < 0.001, d = 0.48) and US ( p < 0.001, d = 0.33), but not SWE. We conclude that maturity Z-scores must be interpreted with significant caution, given the large variations in BMT classification between reference datasets.
参考数据的选择对全国青少年足球运动员的生理成熟时间分类有重大影响
本研究利用各种生长参考数据集调查了 116 名爱尔兰 U13 和 958 名瑞典 U15 国家男子足球运动员的生物成熟时间(BMT)。生物成熟时间以 Z 值表示,将每个球员的预测成年身高百分比(%PAH)与《伯克利生长纵向》(美国)中报告的特定年龄平均值和标准偏差进行比较:伯克利生长纵向研究(美国)、英国 1990 年生长参考研究(英国)和瑞典 2000 年生长参考研究(瑞典)。多项式逻辑回归用于比较不同数据集之间的 BMT 分类(早期、准时、晚期)。单抽样均值 t 检验用于检验每个队列和参照数据集与 BMT 相关的成熟度偏差。对于瑞典 U15 球员(p < 0.001)和爱尔兰 U13 球员(p = 0.003)来说,BMT 分级受到生长参考数据集选择的显著影响。在所有参考数据集中,只有 61% 的球员具有相同的 BMT 类别。在所有数据集中,早熟瑞典球员(平均 = 96.5%PAH )的成熟度偏差较大,但使用 SWE 时偏差适中(d = 0.7),使用 UK 时偏差较大(d = 1.02),使用 US 时偏差非常大(d = 1.36)(所有 p 均为 0.001)。在英国(p < 0.001,d = 0.48)和美国(p < 0.001,d = 0.33),存在有利于早熟爱尔兰球员(平均 = 87.1%PAH)的小的明显的成熟度偏差,而不是 SWE。我们的结论是,由于参考数据集之间的 BMT 分类差异很大,因此在解释成熟度 Z 值时必须十分谨慎。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.50
自引率
15.80%
发文量
208
期刊介绍: The International Journal of Sports Science & Coaching is a peer-reviewed, international, academic/professional journal, which aims to bridge the gap between coaching and sports science. The journal will integrate theory and practice in sports science, promote critical reflection of coaching practice, and evaluate commonly accepted beliefs about coaching effectiveness and performance enhancement. Open learning systems will be promoted in which: (a) sports science is made accessible to coaches, translating knowledge into working practice; and (b) the challenges faced by coaches are communicated to sports scientists. The vision of the journal is to support the development of a community in which: (i) sports scientists and coaches respect and learn from each other as they assist athletes to acquire skills by training safely and effectively, thereby enhancing their performance, maximizing their enjoyment of the sporting experience and facilitating character development; and (ii) scientific research is embraced in the quest to uncover, understand and develop the processes involved in sports coaching and elite performance.
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