AUTHOR=Curovic Ivan , Grecic David TITLE=High-level personal trainer perspective for industry practice and development in Serbia: a qualitative descriptive study 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.2025.1549979 DOI=10.3389/fspor.2025.1549979 ISSN=2624-9367