How do players playing high intensity sport don’t have the urge to go to the toilet in the middle of the game?
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When you exercise, your body releases adrenaline into the blood. This is responsible for activating the “fight or flight” mechanism. When this happens, your body prioritizes what areas of your body need blood and oxygen more. Your body isn’t very good at determining if you’re playing sports or running from a bear, so it will respond in essentially the same way. Your body doesn’t need to digest food or make urine when you’re running from a bear, your muscles need that oxygen to run away! So it reduces the blood flow to your intestines and kidneys and shuttles it off to the organs that need it more. For this reason, your body doesn’t produce nearly as much urine or feces during periods of high intensity exercise as it normally would.
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