Hyponatremia in the 2009 161-km Western States Endurance Run

Martin D. Hoffman
Kristin J. Stuempfle, Gettysburg College
Ian R. Rogers
Louise B. Weschler
Tamara Hew-Butler


Hyponatremia (low blood sodium) is a potentially life-threatening electrolyte disorder that can affect individuals participating in prolonged physical activity. This paper documents the incidence of hyponatremia in the premier 100-mile running race in the United States.