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A DC cop died of hyponatremia some years ago. I remember being amazed at the amount of water he had drunk.

[edit: changed "killed himself with" to "died of"; the man wasn't suicidal]

It's fairly common in athletes. 13% of the marathon runners tested [0] had hyponatremia. This was at the Boston Marathon, a fairly exclusive race with experienced runners.

[0] https://www.nejm.org/doi/full/10.1056/NEJMoa043901

Runners with slower times, over 4 hours, seemed to be more likely to suffer. The announced qualifying times for the 2022 Boston Marathon include 3:55 for women 50 to 54 and 3:50 for men 60 to 64.

Running a marathon (or any endurance evening) is an extreme activity that is in the category of "make it happen". It burns double or more the calories of any pro sport.

The Tommy Lee Jones coffee.