Background Expertise has been extensively studied in several sports over recent years. The
specificities of how excellence is achieved in Association Football, a sport practiced …

Background Subtle differences in chronological age within sport (bi-) annual-age grou**s
can contribute to immediate participation and long-term attainment discrepancies; known as …

Aims To analyze the association of classic and specific bioelectrical impedance vector
analysis (BIVA) and phase angle with reference techniques for the assessment of body …

Objectives The main and interactive effects of biological maturity status and relative age
upon self-regulation in male academy soccer players are considered. Consistent with the …

The aim of the present meta-analysis was to compare the maximum oxygen uptake
(VO2max) characteristics of male soccer players relative to their competitive level, playing …

This study assessed the contribution of relative age, anthropometry, maturation, and
physical fitness characteristics on soccer playing position (goalkeeper [GK], central-defender …

The relationships between maturation and anthropometric and physical performance
characteristics are dynamic and often asynchronous; confounding the capability to …

Many previous studies in national team sports did not report evidence about relative age
effect (RAE) in senior categories. This study aimed for the first time to determine if the RAE …

This study aimed to establish between-day reliability and validity of commonly used field-
based fitness tests in youth soccer players of varied age and playing standards, and to …

Grou** people according to chronological age is popular in fields such as education and
sport. Athletes who are born in the first months of the year usually have cognitive and …