Why do you have to wait 20 minutes before going swimming?

Waiting 20 minutes before swimming after eating is often recommended to prevent discomfort, such as cramping or indigestion, which may occur if the body is trying to digest food while also directing blood flow to the muscles during swimming. However, scientific evidence supporting the need for this waiting period is limited, and many people swim comfortably soon after eating. Ultimately, individual responses can vary, so it's best to listen to your body.