AUTHOR=Vernillo Gianluca , Millet Grégoire P. , Millet Guillaume Y. TITLE=Does the Running Economy Really Increase after Ultra-Marathons? JOURNAL=Frontiers in Physiology VOLUME=8 YEAR=2017 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2017.00783 DOI=10.3389/fphys.2017.00783 ISSN=1664-042X