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The Documented Danger at Marathons Is Drinking Too Much
In a study of 488 Boston finishers, the strongest predictor of dangerous blood sodium was gaining weight during the race. What runners drank made no difference at all.
No Sleep Guideline Anywhere Says Eight Hours
The official number is "seven or more" — a floor with no ceiling. When researchers measured sleep in three societies without electric light, every group averaged under seven.
Your Metabolism Does Not Slow Down at 30. It Holds Steady Until 63.
A study of 6,421 people across 29 countries mapped human energy expenditure from eight days old to 95. It found four life phases. None of them begins at 30.