Iron is the mineral crucial for oxygen transport in the blood. It binds to hemoglobin in red blood cells, enabling them to carry oxygen from the lungs to tissues throughout the body. Adequate iron levels are essential for maintaining energy levels and endurance during physical activity. Individuals with iron deficiency may experience fatigue, decreased performance, and reduced capacity for exercise. Including iron-rich foods, such as lean meats and legumes, is vital for optimal health and athletic performance.