Annual Age-Grouping and Athlete Development

@article{Cobley2009AnnualAA,
  title={Annual Age-Grouping and Athlete Development},
  author={Stephen Paul Cobley and Joseph Baker and Nick Wattie and Jim McKenna},
  journal={Sports Medicine},
  year={2009},
  volume={39},
  pages={235-256}
}
Annual age-grouping is a common organizational strategy in sport. However, such a strategy appears to promote relative age effects (RAEs). RAEs refer both to the immediate participation and long-term attainment constraints in sport, occurring as a result of chronological age and associated physical (e.g. height) differences as well as selection practices in annual age-grouped cohorts. This article represents the first meta-analytical review of RAEs, aimed to collectively determine (i) the… 

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