How Much Water Do You Actually Need Per Day? (Normal People, Gym-Goers and Athletes)
Everyone has heard the rule. Eight glasses a day. Drink more water. Stay hydrated. It gets repeated so often it has become background noise that most people tune out completely. But here is the thing. The eight glasses rule has no solid scientific foundation. It was never based on a clinical study. Nobody seems to know exactly where it came from. And depending on who you are, what you do, and how much you weigh, eight glasses might be either too much or not nearly enough. Water is not just a nice-to-have. It is foundational to every single biological process in your body. Your muscles are roughly 76 percent water. Your blood, which delivers oxygen and nutrients to every organ and tissue, is over 90 percent water. Your brain is approximately 75 percent water. Even mild dehydration of just 1 to 2 percent of your bodyweight has been shown in multiple studies to measurably reduce strength, endurance, cognitive function, mood, and concentration. This guide covers the real numbers for thr...