Usually, 1 hour after a meal can be swimming in the water, so when the food can go through the esophagus to the stomach, through the duodenum to the jejunum, part of the food can be absorbed and digested, to relieve the pressure on the stomach. Swimming belongs to a kind of exercise that can fitness and weight loss, but the blood can be transferred to the digestive tract after a meal, can not make the skeletal muscle blood circulation is not sufficient, skeletal muscle can not be fully activated and warmed up, at this time swimming easy to cause muscle cramps, and can affect the digestive function, and even symptoms such as bloating, abdominal pain, diarrhea. And 1 hour after the meal part of the food has been digested, the stomach pressure is less, blood sugar levels are relatively high, at this time and then swim in the water is the most appropriate. It is recommended to do a good job of warm-up exercises before swimming, such as stretching, relaxation activity joints, jogging, etc. If you still feel stomach discomfort at this time, you can continue to warm-up exercises, half an hour after swimming, can effectively prevent muscle cramps and other situations.