When you deplete glycogen (you can store about 500 grams of it), you also lose 3 grams of water per gram of glycogen. So in total, you lose about 1.5 liters of

When you deplete glycogen (you can store about 500 grams of it), you also lose 3 grams of water per gram of glycogen. So in total, you lose about 1.5 liters of water once you're fully glycogen depleted.