While a cool drink of water may be refreshing when you are engaged in strenuous physical activity, your body actually needs a lot more. The problem is that if you drink to much water alone, you run the risk of an electrolyte imbalance. The symptoms of electrolyte imbalance include headache, nausea, muscle twitching, and even disorientation; all of which can serious impair your ability to compete and in some circumstances can even be physically dangerous. This is why so many professional athletes use sports drinks and other beverages that include electrolytes instead of plain water.   Read more