Fasting fitness precautions: 1, when doing fasting fitness, must be cautious, according to their physical condition to decide whether to do fasting exercise. Because exercise requires the consumption of a lot of energy, mainly from the breakdown of glucose in the blood, fasting can not be timely replenishment of blood sugar, easily lead to hypoglycemia. 2, fasting exercise to pay attention to their own discomfort, such as nausea, dizziness, etc., if these symptoms, should immediately stop exercise, serious need to go to the hospital. 3, fasting exercise can not be too frequent, not more than three times a week, otherwise the body consumption is too serious This can lead to a lack of energy and even diseases.