The athletes also often drink plenty of water when exercising to keep her fluid intake. Unfortunately, most of the drinking water can be fatal and deadly.
A marathon runner in the UK named Kate Mori follows the London Marathon race in 2007. It was the fourth race he had ever attended.
At that time, the temperature was at its peak at 23.5 degrees Celsius. With a view to maintaining fluid intake, Mori tried to drink water as often as possible every stop along the route.
At the 18th mile, Mori felt his body less healthy, but forced myself to stay abreast of the race. Approaching the finish, Mori began to lose consciousness. An hour later, she was at the Royal London Hospital in Whitechapel with severe diarrhea, vomiting, confusion and legs moving as if it is running without stopping.
The diagnosis showed Mori was not passed out from dehydration, but because of excess fluid. Doctors suspect Mori drink about 3 liters of water.
"During this time, the dangers of dehydration during the live sports that require excellent durability has been greatly exaggerated. An athlete should be aware that excessive drinking fluids before, during or after exercise can be fatal," says Timothy Noakes, professor of exercise science at the University of Cape Town , South Africa as reported by The Telegraph, Wednesday (28/03/2012).
None of the medical report stating that the dehydration is the cause of death of a marathon runner. However, deaths caused by excessive drinking has resulted in at least 12 deaths. One example is the death of David Rogers as to race London Marathon in 2007, the death of a female marathon runner from the U.S. in 1993 and also the death of American football player, Paul Allen, in 2010.
Drinking too much before, during or after exercise are causing a dangerous condition called exercise-associated hyponatraemia (EAH). This condition is sometimes called water intoxication is characterized by low concentrations of sodium in the blood and causes the brain to swell. As a result, people become confused, lose consciousness and have seizures.
Symptomatic EAH was first noted by Prof Noakes in the 1980s. The cause was suspected due to drinking and just really confirmed in 1991.
Professor Sanjay Sharma, consultant cardiologist from St George's Healthcare NHS Trust, London and the London Marathon medical director warned that rising temperatures cause more and more people want to drink, especially as sports drink ads are affected.
"Many runners feel the need to drink water whenever he can, regardless of whether you feel thirsty or not. The slower runners are most at risk because longer be on the track. It usually takes four hours to assemble and excess fluid causes EAH," said Prof. Sharma.
Free International Marathon Medical Directors Association (IMMDA) prepared by Prof Noakes in 2003 suggested that drinking water is only to address the thirst alone is sufficient to maintain body fluid balance. Excessive drinking in conflict with human biological signals.
American College of Sports Medicine (ACSM) argues that to avoid dehydration, athletes should not lose more than 2% body weight during exercise.
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