The Relative Age Effect in under-18 basketball: Effects on performance according to playing position

• Published in: PloS one 2018-07, Vol.13 (7), p.e0200408-e0200408
• Main Authors: Ibáñez, Sergio J, Mazo, Aitor, Nascimento, Juarez, García-Rubio, Javier
• Format: Article
• Language: English
• Subjects: Age; Age differences; Age differences (Psychology); Analysis; Athletic ability; Basketball players; Biology and Life Sciences; Birth; Body measurements; Business metrics; Childbirth & labor; Clubs; Discriminant analysis; Indicators; Medicine; Medicine and Health Sciences; Physical Sciences; Physiology; Position indicators; Professional hockey; Regression analysis; Research and Analysis Methods; Soccer; Social Sciences; Sociology; Sports; Sports medicine; Studies; Success; Tournaments & championships; Variance analysis
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0200408

The Relative Age Effect (RAE) in sport is defined as the age difference in the same sport group. This chronological difference implies a different level of sport experience and performance due to developmental and maturational processes. The aim of the present study was to analyze the relative age effect in elite u-18 basketball according to playing positions. The variables analyzed were: date of birth, playing position and technical-tactical performance indicators in basketball (TTPI). A descriptive analysis was carried out to characterize the sample, a lineal regression was used to analyze the influence of the date of birth on basketball performance and finally an ANOVA and discriminant analysis were performed to identify the differences among different playing positions. The results show the existence of the RAE in the top European Under-18 basketball competition (S1 = 67%; S2 = 33%). Performance indicators which are predictors of the birth quarter (p< .05) were only found in the small forwards (defensive rebounds (β: -.463) and fouls received (β: -.140)) and in the centers (three point throws scored (β: -.321) and tried (β: .342)). These results may be of use for coaches and clubs when recruiting players for each playing position. Older forwards and centers are capable of performing at a higher level. Therefore, clubs have to sign up those players born at the beginning of the year.