Current hydration guidelines are erroneous: dehydration does not impair exercise performance in the heat
Bradley A Wall, Greig Watson, Jeremiah J Peiffer, Chris R Abbiss, Rodney Siegel, Paul B Laursen
British Journal of Sports Medicine Aug 2015, 49 (16) 1077-1083; DOI: 10.1136/bjsports-2013-092417