Rex kwan Do
True but conventional thinking (possibly wrong) is that once you do eat your body immediately stores the calories because it's not sure when you will eat again.
Ultimately i feel i am depleting my glycogen during the night and morning, then my body starts to burn fat after 12 hours(research says). Zone 2 is fine for a fasted state as it’s low intensity. Zone 3 or more you need to be very careful or once the glycogen is burned up you will start to burn muscle and not fat.