Hitting the Wall and the Videos about ATP, Glycogen, how muscles work reminds me that these should have been FUNDAMENTAL to Health Education in High school. Ok, TL:DR the only time you burn fat is when: you've put your muscles under a lot of stress, and you've entered a different metabolic "mode" where there is that muscle pain you've reached a point in exhaustion where alertness is severely diminished, and there is a major change in attitude - like wanting to quit. I always note how different my attitudes are when i started and when I hit this level, its so stark that there was a Physiological change. This is "The Wall" So you're burning fat, whoopie doo... its in very small increments its worthless if you had a net calorie gain for the day. Emotionally drained, I'm susceptible to binging. Best Points of Loosing Fat Sleeping. Yes, because sleeping is the only time I'm not hungry or eating. Sleeping is when my body w...