AUTHOR=Schorer Jörg , Faber Irene , Büsch Dirk , Baker Joseph , Wattie Nick TITLE=Longitudinal investigations of development in handball and its association with relative age effects JOURNAL=Frontiers in Sports and Active Living VOLUME=7 YEAR=2025 URL=https://www.frontiersin.org/journals/sports-and-active-living/articles/10.3389/fspor.2025.1528684 DOI=10.3389/fspor.2025.1528684 ISSN=2624-9367