Quoted post said:Originally posted by dfwx
Excessive water intake can cause brain damage and death if it lacks salt. Massive consumption of water while sweating depletes the body of salt - which is necessary for brain function. If you consume a lot of water, it must have salt in it. There have been reported deaths from excessive water consumption by atheletes who were drinking only pure water.
These are very extreme cases and 99.9% of cyclists shouldn't worry. There is more risk to health from drinking too little!