Key dietary considerations for athletes during competitive events include proper hydration, balanced macronutrient intake, and timed nutrition. Ensuring adequate hydration before, during, and after competition helps maintain peak performance and prevent fatigue. Athletes should focus on balanced carbohydrates for energy, proteins for muscle repair, and healthy fats for sustained energy during events. Timing nutrient intake is crucial for optimal performance; consuming easily digestible foods before and during events can enhance energy levels and recovery post-competition.