Getting up on an empty stomach in the morning is not suitable for strenuous exercise, because exercise requires energy, and strenuous exercise on an empty stomach can easily cause blood sugar instability. You can do some simple exercises such as yoga and walking. In addition, you can eat something to pad your stomach before exercise to avoid hypoglycemia. It is generally best to exercise in the afternoon or evening. At this time, exercise can not only eliminate fatigue, but also benefit the consumption of body heat.