Anyone do this first thing in the morning? I have to be at work at 7:00AM, so I wake up at 5:30, go do my run, then eat breakfast, and run out the door for work. Today was my 3rd day doing GC and my first time doing it fasted. I normally can do 6 sprints without dying, but this morning I could only do 4 before I felt like puking. On the cool-down run, I almost puked as well. Is it not such a good idea to do GC before eating?