No functional reserve at exhaustion in endurance-trained men?

David Morales-Alamo, Marcos Martin-Rincon, Mario Perez-Valera, X Samuele Marcora, and José A. L. Calbet Department of Physical Education, University of Las Palmas de Gran Canaria, Campus Universitario de Tafira s/n, Las Palmas de Gran Canaria, Spain; Research Institute of Biomedical and Health Sciences (IUIBS), Las Palmas de Gran Canaria, Canary Islands, Spain; Department of Sports and Informatics, Pablo de Olavide University, Seville, Spain; and Endurance Research Group, School of Sport and Exercise Sciences, University of Kent, United Kingdom