It is recommended to work out more than 1 hour after eating, or more than 30 minutes after fitness exercise before eating, such time is more reasonable. Because after eating the blood system is mainly concentrated in the digestive organs, to help digestion and absorption, at this time if the meal immediately after the fitness, will lead to blood circulation from the digestive organs shunt to the motor nervous system, long-term will reduce the digestive function, will lead to indigestion and gastrointestinal tract diseases. Therefore, it is recommended that at least 1 hour after eating before exercise; if you eat immediately after fitness, the nervous system is still in a highly excited state, if you eat immediately will also affect the distribution of blood circulation in the digestive system, which will also cause indigestion or gastrointestinal disorders. Therefore, it is recommended that after eating should be more than 1 hour fitness, at least 30 minutes of rest after the body health before eating more appropriate.