More people are hospitalised every year at marathon events as a result of over-drinking, or water intoxication, than from dehydration, according to Prof Tim Noakes of the Sports Science Institute of South Africa. If you're an athlete, it's time to take note of the symptoms of this serious, preventable condition.

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Water intoxication can mimic the signs of heat stroke such as nausea, vomiting, extreme fatigue, respiratory distress, dizziness, confusion, disorientation, coma and seizures. Watch out for: a progressively worsening headache; body temperature rising higher than 39,9 degrees Celsius during or immediately after exercise; swelling of the hands and feet; and coughing pink, frothy sputum.
 

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