Abstract

Background

During adolescence, deselection from sport occurs during team try-outs when month of birth, stage of growth and maturation may influence selection.

Aim

The purpose of this study was to identify differences in growth and maturity related factors between those selected and deselected in youth sports teams and identify short-term associations with continued participation.

Subjects and methods

Eight hundred and seventy participants, aged 11–17 years, were recruited from six sports try-outs in Saskatchewan, Canada: baseball, basketball, football, hockey, soccer and volleyball. Two hundred and forty-four of the initial 870 (28%) returned for follow-up at 36 months. Chronological (years from birth), biological (years from age at peak height velocity (APHV)) and relative (month of birth as it relates to the selection band) ages were calculated from measures of date of birth, date of test, height, sitting height and weight. Parental heights were measured or recalled and participant’s adult height predicted. Reference standards were used to calculate z-scores. Sports participation was self-reported at try-outs and at 36-month follow-up.

Results

There was an over-representation of players across all sports born in the first and second quartiles of the selection bands (p < 0.05), whether they were selected or deselected. z-scores for predicted adult height ranged from 0.1 (1.1) to 1.8 (1.2) and were significantly different between sports (p < 0.05). Height and APHV differences (p < 0.05) were found between selected and deselected male participants. In females only weight differed between selected and deselected female hockey players (p < 0.05); no further differences were found between selected and deselected female participants. Four per cent of deselected athletes exited sports participation and 68% of deselected athletes remained in the same sport at 36 months, compared with 84% of selected athletes who remained in the same sport.

Conclusions

It was found that youth who attended sports team’s try-outs were more likely to be born early in the selection year, be tall for their age, and in some sports early maturers. The majority of both the selected and deselected participants continued to participate in sport 36 months after try-outs, with the majority continuing to participate in their try-out sport.

中文翻译：

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青春期成长和成熟对团队选择和短期运动参与的作用。

摘要

背景

青春期期间，从团队中进行选拔时会退出运动选择，此时出生月份，成长阶段和成熟阶段可能会影响选择。

目标

这项研究的目的是确定在青年运动队中被选择和被取消选择的那些人与生长和成熟相关的因素之间的差异，并确定持续参与的短期关联。

主题与方法

来自加拿大萨斯喀彻温省的六个体育锻炼项目招募了八百七十名年龄在11至17岁的参与者：棒球，篮球，足球，曲棍球，足球和排球。最初的870例中有244例（占28％）在36个月后返回随访。根据出生日期，测试日期，身高，身高，体型，年龄，年龄，相对年龄（与选择带相关的出生月份），年龄（出生年龄），生物学年龄（在最高身高速度处的年龄）。坐着的身高和体重。测量或回忆父母的身高，并预测参与者的成人身高。参考标准被用于计算z得分。在参加试验和36个月的随访中，自我报告了体育参与情况。

结果

在选择带的第一和第二四分位数中出生的所有运动项目中，运动员的任职人数过多（p  <0.05），无论是选择还是取消选择。成人预测身高的z得分在0.1（1.1）至1.8（1.2）之间，并且在各项运动之间存在显着差异（p  <0.05）。 在选定和未选定的男性参与者之间发现身高和APHV差异（p <0.05）。在女性中，只有选定和未选定的女子冰球运动员之间的体重有所不同（p <0.05）; 在选定和未选定的女性参与者之间没有发现进一步的差异。被取消选择的运动员中有4％退出了运动项目，而在被选中的运动员中，有36％的人在36个月后仍参加了这项运动，相比之下，仍然被选中的运动员中有84％仍然参加了这项运动。

结论

研究发现，参加运动队试训的青年更有可能在选拔年出生，年龄高，在某些体育运动中早熟。选拔和取消选拔的参与者中的大多数都在试用后36个月继续参加运动，而大多数则继续参加他们的试用运动。