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Maintaining Proper Hydration on the Day of New York Marathon : Maintaining Electrolytes, Avoiding Over-Hydration or Under-Hydration.

If you're not properly hydrated or if your body is not properly nourished, you are not going be able to perform at your peak performance levels. However, if you overdrink, you are likely to dilute the electrolyte in your body, and possibly make yourself susceptible to a dangerous condition called Hyponatremia.