Hyponatremia and seizures in an ultradistance triathlete

J Emerg Med. 2000 Jan;18(1):41-4. doi: 10.1016/s0736-4679(99)00160-2.


Hyponatremia is being increasingly recognized as a complication of participation in ultra-endurance sports. Reported is the case of an Ironman triathlete who collapsed at the end of the race, having gained 5% in body weight. His serum sodium concentration at the finish was 116 mmol/L. After an Intensive Care Unit course complicated by recurrent seizures, he eventually made a complete neurologic recovery. The pathogenesis of hyponatremia and its management in such cases is discussed.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Electrocardiography
  • Emergencies
  • Exercise*
  • Humans
  • Hyponatremia / etiology*
  • Male
  • Physical Endurance*
  • Seizures / etiology*