30 minutes before exercise, it is better to be about 1 hour, because after meals, it depends on the digestive system to digest, and exercise is not good for digestion at this time.

After exercise 15 minutes. After exercise, the blood mainly flows to the related skeletal muscles, and the relative digestive system is short of blood supply, indicating that the digestive system is relatively weak at this time. Eating at this time is not good for the digestive system, and absorption is not good, which is also a digestive problem. Generally, after 15 minutes, eat after qi and blood are balanced.