I am an athlete like you, train and sweat every day to improve. My professional work does not mean that I do not understand the unscientific athletes. I just wanted to open a debate over we are not 100% follow the recommendations that we sell with economic interests. For example, hypoxia yes or no? the answer is that it depends on the individual response of each person to the conditions of lower oxygen uptake. Also in this case it is obvious to think that hydration should not follow such strict guidelines but each must individually assess their response and tolerance to environmental conditions. The sensation of thirst itself is already an alarm but if we drink too much too used to the body fluid to demand for it in terms of heat and moisture not the recommended amount could be between 400 and 800 ml per hour at most.