Adding heat to the live-high train-low altitude model: a practical insight from professional football - Buchheit, M.; Racinais, S.; Bilsborough, J.; Hocking, J.; Mendez-Villanueva, A.; Bourdon, P. C.; Voss, S.; Livingston, S.; Christian, R.; Périard, J.; Cordy, J.; Coutts, A. J. (British Journal of Sports Medicine, 2013)