Absolute nonsense. The claim is that if I produce 2.5watts per kg in body weight for 2 hours, I’m not going to burn any extra calories? So when I “bonk” and exhaust glycogen stores due to underfueling that’s actually not true?
I think that the claim is that what you're experiencing absolutely does happen, and your body responds by cutting corners on your baseline when you're sleeping or sitting around on the couch to avoid you starving to death (because it doesn't know that you can trivially increase your food intake if needs must).
