I'm a 46 year old intermediate cyclist. I ride 150-170 miles per week. On Saturday morning my group does a pretty hard ride (for me, anyway) - 65 miles at a good clip. I normally try to eat healthy afterwards -- lean protein, whole grains, vegetables, plenty of water. But I often feel flat on my Sunday morning group ride, which is just as fast and about 45 miles. Last night my friend came over to celebrate his new job. We drank a couple of Blue Moons and ate lots of pita chips, then went out and ate jalapeno cheeseburgers and french fries and washed them down with a 24 oz Guinness draught. Not exactly health food. But this morning on my ride I felt terrific and had more energy than usual. I'm thinking that maybe the healthy food I'm eating on Saturday is not giving me the replenishment and energy I need to prepare for Sunday's ride. Thoughts?