AUTHOR=McLaughlin Mackenzie , Dizon Kaye , Jacobs Ira TITLE=The effects of aerobic exercise and heat stress on the unbound fraction of caffeine JOURNAL=Frontiers in Physiology VOLUME=15 YEAR=2025 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2024.1370586 DOI=10.3389/fphys.2024.1370586 ISSN=1664-042X