Aerobic capacity is directly related to endurance performance, as it measures the body’s ability to supply oxygen to working muscles during sustained exercise. Higher aerobic capacity allows for greater reliance on aerobic metabolism, enabling athletes to perform at optimal levels over extended periods. Enhanced aerobic capacity improves cardiovascular health and increases overall stamina, allowing athletes to maintain intensity longer without fatigue. Thus, a well-developed aerobic capacity is critical for success in endurance sports such as long-distance running, cycling, and swimming.