I've read this so many times, from so many different sources. I think the science of it makes sense, so after a few weeks of debating, I decided to try it. It only made sense to have my cheat day fall on my lazy day, Sunday. I had it all planned out. So yesterday, while watching the masters I lined up pancakes, cheeseburgers and ice cream and ate until I couldn't anymore. I felt good at the time, now today I have the worst lethargic, Sunday Funday food hangover. I felt like I've had zero energy all day/night long. Has anyone else had the this happen to them?