Final answer:
Regular aerobic exercise increases cardiorespiratory endurance by stimulating the growth of capillaries and mitochondria in the cells, allowing for increased oxygen delivery and energy production. This leads to improved endurance and oxygen utilization during exercise.
Step-by-step explanation:
Aerobic exercise stimulates the growths of more capillaries to the cells and more mitochondria in the cells. This helps increase cardiorespiratory endurance because it allows for increased oxygen delivery to the muscles and increased energy production within the cells. As a result, the body is able to use more oxygen efficiently during exercise, leading to improved endurance.