You can't. Exercise on an empty stomach in the morning is likely to lead to the following three adverse consequences:

1, running on an empty stomach will increase the burden on the heart and liver, and it is prone to arrhythmia;

2. Long-term fasting exercise may lead to "suffocation" and stomach problems;

3. Exercise needs energy. Usually, the energy source of human body is mainly carbohydrate intake in diet. When exercising on an empty stomach, such as running in the morning, the main energy source depends on the supply of fat. At this time, the free fatty acids in the blood will increase obviously, and fatty acids will not only become the energy source of myocardial activity, but also become the poison of myocardium in excess, which can cause various arrhythmia and even lead to sudden death.