Hyponatremia is most likely to be a problem for ultradistance athletes and slow marathon runners.

Question

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Hyponatremia, or low sodium levels in the blood, is more likely to occur in endurance athletes who consume excessive amounts of water or fluids without adequate electrolyte replacement. This is more common in ultradistance events and slower marathon runners who may take longer to complete the race and consume larger amounts of fluids.

Hyponatremia Is Most Likely to Be a Problem for Ultradistance