OBJECTIVES: The purpose of this study was to investigate the influence of biological
maturity on measures of running fitness and running performance in both training and
competition in junior Australian football. DESIGN: Cross sectional observational. METHODS:
Fifty-two male junior players from five age groups (U11–U19) participated. Biological
maturity was self-assessed based on Tanner's description of five pubertal stages (P1–P5) as
well as objectively estimated from anthropometric measures and expressed as years to and …