Myth: When you are just full, your stomach is like a balloon filled with water, and if you run and jump at this time, your stomach will be like a balloon, and it will be "falling" to deformation by what is inside, causing your stomach to prolapse.
Truth: Our internal organs are actually attached to the muscles, connected to many ligaments, fascia, etc., and are "pocketed" where they should be, although they can move one or two, it is difficult to move violently. Gastric prolapse is due to problems with this "suspension system", such as insufficient diaphragm suspension, decreased function and relaxation of the supporting ligaments, decreased intra-abdominal pressure, low gastric tone, and relaxation of abdominal muscles. Long-term exertion, overuse of the brain, hyperperistalsis of the gastrointestinal tract, and decreased diaphragm position can all lead to gastric prolapse. Eating little or overeating for a long time can also increase the risk of stomach prolapse. However, these factors are often accumulated over time, and have little to do with light exercise after meals. Therefore, we don't have to worry about "walking 100 steps after eating" to get a sagging stomach.
Of course, if you overeat and immediately do strenuous exercises such as running and skipping rope, it may lead to the reflux of things in the stomach, making people feel uncomfortable, and if you exercise vigorously just after eating, your movements may be deformed due to factors such as bloating, and you will not be able to play your best level. Therefore, if it is a strenuous exercise, it is recommended to do it 1 2 hours after eating.
*: From the January 2024 edition of Science's Myth List.