Which term describes the body's ability to deliver oxygen to working muscles during movement?

Which term describes the body's ability to deliver oxygen to working muscles during movement?

• A. Strength
• B. Flexibility
• C. Cardiovascular endurance
• D. Muscular endurance

Answer: (C)

The ability to deliver oxygen to working muscles during movement is about how well the cardiovascular system keeps oxygen-rich blood flowing to muscles as you exert yourself. Cardiovascular endurance captures this capacity—the heart, lungs, and blood vessels working together to supply sustained oxygen for energy production during activity. When you exercise, your muscles demand more oxygen, and your heart increases its rate and blood flow to meet that need, improving aerobic capacity over time. Strength is about how much force muscles can produce, flexibility is about how much a joint can move through its range of motion, and muscular endurance is about a muscle’s ability to perform repeated contractions over time. While these are important, they don’t specifically describe the system’s efficiency in delivering oxygen during movement in the same way cardiovascular endurance does.

The ability to deliver oxygen to working muscles during movement is about how well the cardiovascular system keeps oxygen-rich blood flowing to muscles as you exert yourself. Cardiovascular endurance captures this capacity—the heart, lungs, and blood vessels working together to supply sustained oxygen for energy production during activity. When you exercise, your muscles demand more oxygen, and your heart increases its rate and blood flow to meet that need, improving aerobic capacity over time.

Strength is about how much force muscles can produce, flexibility is about how much a joint can move through its range of motion, and muscular endurance is about a muscle’s ability to perform repeated contractions over time. While these are important, they don’t specifically describe the system’s efficiency in delivering oxygen during movement in the same way cardiovascular endurance does.