A fundamental principle of sports nutrition is the importance of fueling the body with the right balance of macronutrients: carbohydrates, proteins, and fats. Carbohydrates provide the primary energy source for athletes, proteins support muscle repair and growth, while healthy fats are essential for overall health and endurance. Timing and composition of meals can significantly impact performance and recovery, so athletes are encouraged to consume nutrient-dense foods before and after training sessions. Hydration also plays a critical role in sports nutrition, ensuring optimal performance during physical activity.