Heat stroke is an emergency condition in which thermoregulation fails and the body temperature rises above 104 ☏ (40 ☌). As a marathon medical director described the counter-intuitive and under-publicized risk in 2005: 'There are no reported cases of dehydration causing death in the history of world running, but there are plenty of cases of people dying of hyponatremia.' The second major risk arises from imbalanced fluid or electrolyte levels, particularly hyponatremia (sodium deficiency, overhydration, or water intoxication).

This translates to a few published marathon deaths worldwide in a typical year, although the authors lamented the lack of a central registry for the information.

In 2016, a systematic medical review found that the risk of sudden cardiac death during or immediately after a marathon was between 0.6 and 1.9 deaths per 100,000 participants, varying across the specific studies and the methods used, and not controlling for age or gender. The age distribution ranges widely, from the teens through the sixties. exertional heat stroke or severe hyperthermia.exercise-associated hyponatremia or other electrolyte imbalance.sudden cardiac death, triggered by a congenital or acquired heart disorder.Below is a sortable list of individuals who died as a result of running a marathon.Ĭauses of death during the marathon

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