Reducing carbohydrate intake to 50 grams or less per day and employing low-residue diets can help athletes passively lose water weight by depleting glycogen and reducing gut content.

“you're going to typically keep carbohydrate very low 50 or less grams sort of depending on what they're doing and you're going to deplete glycogen that alone is going to start helping you pull some water so you're going to passively do it you can play games with fiber and so you have these low residue diets the last couple of days and so you can make sure you're not holding on to food in your gut that can buy you a couple of kilos depending a kilo depending on the size of the person”