Diet significantly affects energy levels for physical activity by providing the necessary nutrients and calories to fuel workouts. A balanced diet rich in complex carbohydrates, proteins, and healthy fats ensures that individuals have sufficient energy to perform optimally. Carbohydrates are particularly crucial, as they supply glucose, the primary energy source for muscles during exercise. Inadequate nutrition can lead to fatigue, decreased motivation, and impaired performance. Additionally, hydration plays a critical role in maintaining energy levels; dehydration can significantly hinder physical output. Therefore, a well-planned diet is essential for sustaining energy and enhancing overall athletic performance.