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Clin J Am Soc Nephrol. 2007 Jan;2(1):151-61. Epub 2006 Nov 29.

Exercise-associated hyponatremia.

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Division of Nephrology, Department of Internal Medicine, University of Virginia Health System, Charlottesville, VA 22908, USA.


Exercise-associated hyponatremia has been described after sustained physical exertion during marathons, triathlons, and other endurance athletic events. As these events have become more popular, the incidence of serious hyponatremia has increased and associated fatalities have occurred. The pathogenesis of this condition remains incompletely understood but largely depends on excessive water intake. Furthermore, hormonal (especially abnormalities in arginine vasopressin secretion) and renal abnormalities in water handling that predispose individuals to the development of severe, life-threatening hyponatremia may be present. This review focuses on the epidemiology, pathogenesis, and therapy of exercise-associated hyponatremia.

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