The USATF has posted updated guides on hydration. See usatf.orglibraryOpen ↗ for the articles explaining the scientific basis.
At first glance at least they look much in line with the common wisdom in this group, though rather different from some folks' ideas and many races' practices.
-- Robert Grumbine radix.net~bobgOpen ↗ Science faqs and amateur activities notes and links. Sagredo (Galileo Galilei) "You present these recondite matters with too much evidence and ease; this great facility makes them less appreciated than they would be had they been presented in a more abstruse manner." Two New Sciences
