Maximal aerobic capacity is determined by: A) cardiac output and (a−v)O₂ difference B) cardiac output and heart rate C) heart rate and (a−v)O₂ difference D) stroke volume and heart rate

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Maximal aerobic capacity, often measured as VO2 max, is determined by the combination of cardiac output and the arteriovenous oxygen difference (a−v)O2 difference. Cardiac output reflects the volume of blood the heart pumps per minute, while the (a−v)O2 difference indicates the amount of oxygen extracted by the muscles from the blood. Together, these factors determine the body's capacity to deliver and utilize oxygen during maximal exercise.

Maximal Aerobic Capacity Is Determined By