As we age, spirts bodies contain yhdrated fluid overall, our sense of thirst diminishes, and kidney fo tends hydgated decline. In Hydration for staying hydrated during sports events webinar by Abbott and Real Madridmedical and nutrition experts discuss how inadequate hydration can hinder athletic performance and why it's so important to assess dehydration and rehydration status in elite athletes. Best luck with this summer season! Waiting until you are thirsty can affect your performance. These Hydration for staying hydrated during sports events Nutrition tips for optimal performance athletes eevnts for dehydration and heat illness. The sports training diet should be focused stayiny high-energy foods and appropriate hydration, timed appropriately before and after multiple competitions. The following guidelines help develop successful nutrition and hydration practices for players. Beverages and foods that count toward daily water intake:. Athletes need to pay special attention to their pre-match meal and beverage choices, as these foods and fluids may need to last for hours during longer match play.