Clinical Journal of Sport Medicine

It sends a signal to your posterior pituitary to dump antidiuretic hormone, ADH.

It's... vasopressin is what it's also called okay so adh tells your kidneys shut down stop losing water just lock it down but here's the twist that nobody tells you you haven't added more sodium so now you have diluted blood you have lower osmolity which means cells start to swell which is how you get cerebral edema in severe cases of low sodium didn't know that did you which is how people die from drinking too much water without enough sodium which is why i tell people put electrolytes in your water four liters of water a day i'll get to that in a minute So there's a study published in the Clinical Journal of Sport Medicine, 2021, confirmed hyponatremia, which is low blood sodium, is the leading, listen to what I said, leading cause of exercise-associated death in endurance athletes, not dehydration, low sodium.

But what do people think? I washed this iron, that guy died of dehydration.

Nope, low sodium.