I fast during the day, every day. Last few months I've increased my work-outs to include running and boxing as well as biking. On days when I do all three I have an apple or banana for lunch, sometimes an Oh Yeah bar afterwards. My point is the whole fueling thing is bunk, for me anyway. I think we've been sold on the idea that we need this constant and exotic fuels to be "athletic", sorta like supplements. Think again.