The relative age effect in youth soccer across Europe
Authors: Helsen, Werner1; van Winckel, Jan1; Williams, A Mark2
Source: Journal of Sports Sciences, Volume 23, Number 6, June 2005 , pp. 629-636(8)
Publisher: Taylor and Francis Ltd
Abstract:
The potential asymmetries in the birth-date distributions of youth soccer players across ten European countries (2175 age citations) were considered. First, we examined the birth-dates of players representing national youth teams in international competitions. Second, the birth-dates of players representing professional club teams in international youth tournaments were analysed. Kolmogorov-Smirnov tests were used to assess differences between observed and expected birth-date distributions. Regression analyses were employed to examine the relationship between month of birth and number of players in the different samples. The results showed an over-representation of players born in the first quarter of the selection year (from January to March) for all the national youth selections at the under-15 (U-15), U-16, U-17 and U-18 age categories, as well as for the UEFA U-16 tournaments and Meridian Cup. Players with a greater relative age are more likely to be identified as talented because of the likely physical advantages they have over their younger peers. Some options for reducing the relative age effect are offered.Keywords: Performance; player selection; seasonal variation; talent identification
Document Type: Research article
DOI: 10.1080/02640410400021310
Affiliations: 1: Department of Kinesiology, Katholieke Universiteit Leuven, Leuven, Belgium 2: Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK

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