Is it true that excessive workout can cause sodium loss?
Normally, we lose sodium through sweat while exercising. Drinking water and eating food can compensate this. But if exercising or working hard on a very hot day, we are at risk of losing too much sodium. Consequently, only drinking water may not be sufficient as water can dilute sodium concentrations in the blood. This sodium dilution can cause cerebral edema, muscle spasm or twitching, blacking out, losing consciousness, or even death. Therefore, sodium should be supplemented properly by drinking electrolyte beverage after we exercise long, heavily, or in the heat. Some people may wonder why athletes who work out much more heavily than us do not suffer from this. The answer is that athletes who have endured long training do not lose as much mineral as other people do.
Source: http://thedietpump.exteen.com/20110203/tdp-station-4?n=y
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