Okay, so I read here once that your body stops burning glycogen and starts burning fat after about 12 minutes....
.... then I also read that it stops burning glycogen and starts burning fat after about 30 minutes, first thing in the morning.
I thought the purpose of doing it in the morning was to make sure your body was burning fat, no food. But if it takes 12/30 minutes (whichever) either way to get into fat-burning mode, what difference does it make when you do your cardio?
That probably made no sense.