At its basic level, hydration is simple. Feel thirsty after a run? Drink something. Heading into an epic meeting? Bring along a water bottle. Despite this simplicity, there’s an ocean of misleading information out there that leaves runners confused. Eight glasses a day, or not? Drink before you’re thirsty, or only when thirst hits? Does coffee really dehydrate you?
Source: 8 Hydration Myths Busted