Exercise-associated hyponatremia cells in one area begin to increase in size, swelling occurs in the affected area. Swelling is commonly observed in hands, legs, and feet. Sodium is also important in regulating the amount of water that passes through the blood-brain barrier. Decreased sodium blood levels result in increased permeability of water across the blood-brain barrier. This increased influx of water causes brain swelling which leads to severe neurological symptoms. EAH is categorized by having a blood serum or plasma sodium level below normal, which is less than 135 mmol/l. Asymptomatic EAH is not normally detected unless the athlete has had a
Department of Defense Serum Repository Department of Defense Serum Repository The Department of Defense Serum Repository (also referred to as the DoD Serum Repository or simply DoDSR) is a biological repository operated by the United States Department of Defense containing over 50,000,000 human serum specimens, collected primarily from applicants to and members of the United States Uniformed Services. The DoDSR is located in Silver Spring, Maryland and is operated by the Armed Forces Health Surveillance Center (AFHSC), a subordinate of the United States Army Center for Health Promotion and Preventive Medicine (USACHPPM), itself evolved from the Johns Hopkins School of Hygiene and Public Health. The