Hi, i am not a racer, but i bike a lot, i ride 2 or 3 times a week, 25 miles, for those that ride this much or more, what do you eat the day before, or don't you alter your diet, and just ride, yesterday at the 18 mile point, i ran out of gas, and had to push it to make 25 miles, i had plenty of water, just struggled, to finish. i had no breakfast, just got upshowered and rode.