Cooper, TomWhatman, Chris2026-02-092026-02-092025-12-22New Zealand Journal of Sports Medicine 51(2), 51-56. ISSN: 0110-6384 (Print); 0110-6384 (Online), New Zealand Federation of Sports Medicine.0110-63840110-6384http://hdl.handle.net/10292/20603The aim of this study was to examine maturation selection bias and injury in a secondary school sports academy. Male students (n=98) from a Boys High School had their anthropometric measurements taken (standing height and weight). Estimated percent of predicted adult height (%PAH) was derived using the Khamis-Roche method. Percent of PAH was used to estimate maturity status and timing. Participants also completed an injury history survey designed to record injuries experienced over the previous three months. Most participants were early maturers (65%, n=64), suggesting a bias towards the selection of more mature players. Late maturers accounted for only 1% (n=1) of players selected. Injury history identified that 60% (n=52) of participants had been injured in the three months prior to data collection but there was no association with maturity status. Increased awareness of the potential for maturity-based selection bias in secondary school team sports is needed.This version of the article is made freely available here with the permission of the Editor of the New Zealand Journal of Sports Medicine. Recent issues of the journal are available with a subscription here: https://www.sportsmedicine.co.nz/nzjsm-latest or through the library here: https://library.aut.ac.nz/pwsection/new-zealand-journal-of-sports-medicine1106 Human Movement and Sports Sciences3202 Clinical sciences4207 Sports science and exerciseJournal ArticleOpenAccess