AUTHOR=Ardigò Luca P. , Capelli Carlo , Millet Grégoire P. TITLE=Editorial: Human Ultra-Endurance Exercise JOURNAL=Frontiers in Physiology VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2020.00664 DOI=10.3389/fphys.2020.00664 ISSN=1664-042X