First of all-this is not a problem.
In fact, is it good to take oxygen on an empty stomach? This is not a problem.
Because when we talk about whether a sport is harmful, the first thing to evaluate is whether it will directly harm the body. It's like the "seven-wound boxing", you must hurt yourself before you hurt others. It is definitely not a sport with a high safety factor. What should I do with oxygen on an empty stomach? The answer is simple. It's okay once in a while. You can't hurt your body just because you have oxygen on an empty stomach. Of course, there are two preconditions.
Premise 1: Your aerobic environment on an empty stomach is good, without pollution and other dangers.
Premise 2: Good health, no heart disease, high blood pressure and other problems, and good living and exercise habits.
Therefore, if these two premises are met, there is no problem with aerobic fasting. So what do other authors think of cortisol and muscle loss? In fact, they are all right, except for one thing.
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