Aerobic exercise can help to enhance heart and lung function, reduce body fat and maintain healthy body condition, and fasting aerobic exercise is considered to be a more effective way to reduce fat.

However, it is still controversial whether we can always believe in oxygen inhalation on an empty stomach. Studies have shown that aerobic exercise on an empty stomach can improve the utilization rate of body fat, because the body will use fat as the main energy source when there is no food available. However, other studies show that aerobic exercise on an empty stomach may cause the body to break down muscle tissue to provide energy, which is not conducive to muscle growth and maintenance.

In addition, whether to eat before aerobic exercise and what to eat may also affect the effect of exercise. Eating some foods containing carbohydrates, such as bread, fruit or energy bars, can provide the energy needed by the body and is conducive to longer and more intense exercise.

Therefore, whether to choose aerobic exercise on an empty stomach should be considered comprehensively according to your physical condition, exercise purpose and eating habits. It's best to consult a doctor or a professional fitness coach before any new exercise plan is carried out.