The respiratory system plays a vital role in exercise by ensuring an adequate supply of oxygen to working muscles and removing carbon dioxide produced during increased metabolic activity. In Physiological Anthropology, the study of the respiratory system during exercise helps to understand how the human body adapts to physical stress and how variations in respiratory efficiency influence performance, endurance, and adaptation among different populations. During exercise, the demand for oxygen increases because contracting muscles require more energy through aerobic metabolism. The respiratory system responds by increasing the rate and depth of breathing. At rest, breathing is controlled to maintain normal oxygen and carbon dioxide levels in the blood, but during exercise, signals from the brain, muscles, and chemical receptors stimulate the respiratory centers to enhance ventilation. This increase in pulmonary ventilation