Chapter 1
The inner plumbing of thirst
Chapter 2
Busting the H2O myths
Chapter 3
The danger zone of overhydration
Chapter 4
Global adaptation and ancient wisdom
Ch 3 · The danger zone of overhydration
doctorx Diluted blood sodium from rapid water intake forces fluid into brain cells through osmosis, causing swelling, headaches, and dangerous seizures.
Quiz
Which organ is most dangerously affected by the swelling that occurs during severe water intoxication?
Quiz
What is the scientific name for abnormally low sodium levels in the blood, often caused by overhydration?
Quiz
Approximately how much water can a healthy adult kidney excrete per hour at maximum capacity?
Quiz
What happens to the excess water in your body when you drink faster than your kidneys can excrete it?
Fun Fact
Water speed limit: Your kidneys can only process about one liter of water per hour before fluid starts piling up.
Quiz
What do modern sports scientists recommend as the safest guide for athletes deciding when to drink during a race?
Quiz
What dangerous hydration advice was popularized in sports culture during the late 20th century?
Glossary
hyponatremia (noun)
A medical condition characterized by abnormally low levels of sodium in the blood. In 2002, runner Cynthia Lucero died from overhydration during the Boston Marathon.
A medical condition characterized by abnormally low levels of sodium in the blood. In 2002, runner Cynthia Lucero died from overhydration during the Boston Marathon.
doctorx Kidney Filtration
Your kidneys filter at a steady pace, Chugging extra water won't speed up the race.
Quiz
Which organ is primarily responsible for metabolizing and neutralizing toxins before the kidneys filter them out?