AUTHOR=Brandt Tom , Ebel Cindy , Lebahn Christopher , Schmidt Annette TITLE=Acute physiological responses and performance determinants in Hyrox© – a new running-focused high intensity functional fitness trend JOURNAL=Frontiers in Physiology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2025.1519240 DOI=10.3389/fphys.2025.1519240 ISSN=1664-042X