So, Glucose (C6H12O6) + Oxygen (O2) -----> ATP + CO2 (Carbon Dioxide) + H20 (Water) This is what is known as aerobic glycolysis. It's funny, I learned that formula in high school when I took Bio Technologoy but I had no idea what it meant, where it happend in the body or what it did. Mainly because I didn't pay much attention in high school. So recently I learned what aerobic glycolysis was and what it meant and how it applied to real life by taking a nutrition class in college. So you breathe out the water, and use the ATP for energy, but what happens to the water? I mean I thought excercise dehydrated you (from sweat loss). It's intresting to me that aerobic excercise produces water. How does this extra water affect hydration? Does this mean that lifting weights in very hot weather will dehydrate you faster than running? Anyone care to discuss?