article 2014 10 pages Perturbed energy balance and hydration status in ultra-endurance runners during a 24 h ultra-marathon Ricardo J. S. Costa, Samantha K. Gill, Joanne Hankey, Alice Wright, Slawomir Marczak JournalBritish Journal of NutritionDOI10.1017/S0007114514000907Populationultra-endurance runners View on DOI ↗