The relationship between diet and performance in endurance sports is critical. A well-structured diet provides the necessary nutrients and energy for long-duration activities. Carbohydrates are crucial, as they serve as the primary fuel source, while proteins and fats also play essential roles in recovery and sustained energy. Proper hydration is equally vital. Athletes need to balance their macronutrients and micronutrients for optimal performance, as a poor diet can lead to fatigue, decreased stamina, and impaired recovery, ultimately affecting overall performance.