Answer :
Fitness — including increased cardiorespiratory fitness and endurance (stamina) Regular aerobic exercise improves your cardiovascular fitness by increasing your capacity to use oxygen. It does this by increasing your heart's capacity to send blood (and hence oxygen) to the muscles.
Answer + Explanation:
Cardiorespiratory endurance tests monitor how well the heart, lungs, and muscles perform during moderate to high-intensity exercise. Increasing cardiorespiratory endurance improves oxygen uptake in the lungs and heart and can help a person sustain physical activity for longer.