Too Much Water A Hazard For Marathon Runners, Study Finds

... Marathon runners should limit the amount they drink during the race or they may risk headache, collapse, confusion, memory loss, vomiting, seizures, and even death from fluid accumulation in the lungs or brain: all from dilution of the salt in the blood resulting from excess water intake during exercise (exercise-associated hyponatraemia or water intoxication)... click link for more info. ...