2. After eating a full meal, gastrointestinal activity is enhanced, digestive juice secretion is increased, and the amount of blood needed in the process of digesting food is also increased. At this time, if strenuous exercise is carried out immediately, gastrointestinal activities and the secretion of digestive juice will be inhibited due to the adjustment of nerve and body fluid factors, so that the blood supply of the gastrointestinal tract will be relatively reduced and more will be supplied to the exercise organs, which will lead to the weakening of gastrointestinal digestive function and easily cause gastrointestinal discomfort and pain, and even indigestion.
3. Similarly, you should eat regularly after exercise, because the center that manages muscle activity during exercise is in a state of high excitement, and at the same time, the digestive organs are inhibited, and the activities of the digestive organs will take some time to recover. Therefore, generally do not want to eat immediately after strenuous exercise for a long time, but rest for about 30 minutes before eating.