Nutrition
Hyponatremia Risk Awareness
Hyponatremia risk awareness tracks over-drinking plain water without salt during long events—a dilution risk more common than classic dehydration.
Hyponatremia risk awareness means knowing that drinking large volumes of plain water without sodium during long events can dilute blood sodium—a dangerous condition with nausea, confusion, or swelling. It is more common in slower finishers who over-drink on cool days than in elite dehydration.
Drink to thirst in most conditions; add sodium in heat and duration over ninety minutes. Never force fluid every mile regardless of body size.
Common questions
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Who is most at risk for hyponatremia?
Slower athletes who drink aggressively on cool long courses without replacing sodium. Match fluid to thirst and sweat, not a fixed cup every mile.
Related terms
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