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Military Health System

Marine Corps Cpl. Luis Alicea drinks water after a combat conditioning exercise at Naval Air Station Joint Reserve Base New Orleans, May 20, 2019. Photo By: Marine Corps Lance Cpl. Jose Gonzalez.

Serum sodium concentration is determined mainly by the total content of exchangeable body sodium and potassium relative to total body water. Thus, exertional hyponatremia can result from loss of sodium and/or potassium, a relative excess of body water, or a combination of both.

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Last Updated: June 21, 2022
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