Hunger is not consuming fat, but liver glycogen, and only when you are hungry for more than 12h will you start to use fat. The proof of hunger is that blood sugar has dropped and the feeding center of the brain begins to remind the need to eat. This is not directly related to fat consumption. Aerobic exercise does not feel hungry, but it will effectively burn fat.

Because the brain's feeding center senses the level of blood sugar and the volume of the stomach pouch, it doesn't sense whether body fat is broken down. If you can break down fat without feeling very hungry, it is the best state for weight loss. If you can do so, the chances of rapid rebound after weight loss are very small. Therefore, if you want to lose weight, you have to do exercise when you are hungry, consume calories and fat, and have a good effect.