This is a typical metaphysical view. If you are afraid, you are afraid of a little knowledge. You don't know the whole process of running to lose fat, so you naturally come to this wrong conclusion:
Generally speaking, the raw sugar in our body will maintain a balanced level. If exercise consumes raw sugar, then the human body will inevitably produce a corresponding amount of raw sugar to maintain the sugar balance in the body. Then, according to the conservation of mass and energy, the raw material for human body to produce sugar should be fat consumed as a reserve. This is common sense that everyone knows.
Running on an empty stomach consumes almost the same amount of body fat as eating earlier, because the time when food is converted into glycogen is after running, and the speed of body fat consumption ultimately depends on the time and intensity of aerobic exercise.
On the contrary, if you are hungry, running will cause many hidden dangers, which will easily lead to insufficient energy intake and malnutrition, which is not good for your stomach, and will lead to gastric acid and even gastric ulcer. Jogging to lose weight can be done after meals 1-2 hours, and it can also consume excess energy in the body to achieve the effect of losing weight.
Therefore, the effect of fat consumption depends on whether the intensity of running meets the requirements of aerobic exercise and the duration of running, but running on an empty stomach is not recommended.