Who would have ever thunk it?

Running the Risk of Too Much Water (washingtonpost.com): "In the three years since Defensor nearly died in Orlando, runners, doctors and race officials have spent countless hours thinking about that very problem. Hyponatremia, a sodium imbalance brought on by excess fluid consumption, was once thought primarily to afflict extreme endurance athletes, such as Ironman competitors. But in the past few years, the condition has become increasingly associated with marathoners, in particular women and runners who are on the 26.2-mile course for more than four hours. "
This is some bad stuff - never heard about it until reading this article. A word to the wise for those of you lucky enough to be able to run for 3 or 4 hours! (or nutty enough to do so!).