In the morning should be to eat before exercise, if the fasting exercise, will cause low blood sugar, low blood pressure, and slow blood flow, vascular constriction, but also prone to cause cardiovascular and cerebrovascular accidents. Exercise on an empty stomach is also likely to lead to fatigue and weakness. But it should be half an hour after breakfast and then exercise, if you exercise immediately after breakfast, it will cause gastrointestinal burden, easy to cause gastrointestinal diseases. You can eat some fine protein food for breakfast, such as eggs, milk, cereal. You can also drink some honey water to replenish sugar.