1。 Sugar is a source of energy during exercise. Sugar is the most important and fastest energy-supplying substance in the body, and most of the energy during short-term high-intensity exercise is provided by sugar; And for a long time. Low-intensity exercise is the first time that the human body uses sugar hydrogenation for energy supply. When the sugar in the body is exhausted, it uses fat or protein.

2。 Sugar is the main fuel of the central nervous system: the brain mainly relies on the oxidation of blood sugar in the brain to obtain energy to maintain normal physiological functions. Therefore, when the blood sugar concentration decreases, it will affect the function of the central nervous system, produce fatigue or dizziness, and affect the effect of exercise.

3。 Sugar can save protein: Under normal physiological conditions, the energy provided by protein is very low. However, if the sugar storage in the body decreases, protein needs to participate in the metabolic process of oxidative energy supply and glucose synthesis. Therefore, for the fitness crowd, it is helpful to maintain the number of protein and balance the physiological function by taking proper amount of sugar and maintaining sufficient sugar reserves.