The folk saying that walking a hundred steps after a meal makes you live to be ninety-nine has some scientific basis, but in medicine, it is one-sided. After the human body is full, the blood will flow to the digestive system to help the digestion of food. Walking after a meal helps blood circulation throughout the body, which can consume the calories ingested more quickly, which has certain benefits, and can prevent the accumulation of abdominal fat. However, if you exercise immediately after a meal, it will cause blood to be redistributed from the digestive system to the limbs, which will affect digestion. Therefore, it is recommended to take a walk after half an hour to an hour after a meal. By this time, the food ingested has been partially digested, and by taking a walk, it can help burn off excess calories. The saying that a hundred steps after a meal makes you live to be ninety-nine has some scientific basis, but it is recommended not to take a walk immediately after a meal, and wait for half an hour to an hour before taking a walk.