Aerobic exercise requires a response from the respiratory system to fulfil the body's increased need for oxygen. During aerobic training, the respiratory system adapts to function with greater efficiency to provide oxygen to exercising muscles.
Aerobic training causes the respiratory system to function more efficiently and with increased performance when the body is engaged in regular, frequent aerobic activity. The effects of these changes on the respiratory system are related to the intensity and duration of training.
Cardio-respiratory endurance is the ability of the heart, blood vessels and lungs to bring oxygen to muscles during aerobic activity. Aerobic training increases lung capacity so that more oxygen can enter the body during inhalation. Carbon dioxide increases when muscles are working hard, which increases the respiratory rate.
According to Weber State University, aerobic training increases oxygen exchange in the lungs by increasing the diameter of blood vessels and the surface area of air sacs in the lungs. Greater oxygen exchange increases the amount of oxygen that enters cells.
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