Energy cost and kinematics of level, uphill and downhill running: fatigue-induced changes after a mountain ultramarathon - Vernillo, G; Savoldelli, A; Zignoli, A; Skafidas, S; Fornasiero, A; La Torre, A; Bortolan, L; Pellegrini, B; Schena, F (J Sports Sci, 2015)
doi:10.1080/02640414.2015.1022870