From “The Complete Idiot’s Guide To Sport Nutrition” book:

On a normal day, doing regular activities, you loose about 96 ounces of water, about 4 to 8 ounces from the soles of your feet, 16 ounces from perspiration, 48 ounces in urine and 16-32 ounces from breathing” This is a mind bogging number. How many ounces of water (not coffee or soda) do you drink a day? This is a very interesting book, if you want to check it out, this is the ISBN Number: 1-59257-102-6