Physiological adaptations to cardiovascular activity include a decreased resting heart rate.

Physiological adaptations to cardiovascular activity include a decreased resting heart rate.

• A. Decreased Resting Heart Rate
• B. Increased Resting Heart Rate
• C. No Change In Heart Rate
• D. Irregular Heartbeat

Answer: (A)

Regular cardiovascular training makes the heart more efficient. It pumps more blood with each beat (stroke volume increases), so to meet the body's resting needs, the heart doesn’t need to beat as often. The autonomic nervous system also shifts toward greater parasympathetic (calming) influence at rest, which slows the heart rate further. Together, these changes lower the resting heart rate as an adaptation to endurance activity. That’s why decreased resting heart rate is the expected outcome. Increased resting heart rate would imply less efficiency, no change would suggest no adaptation, and an irregular heartbeat isn’t a typical training adaptation and could indicate a problem.

Regular cardiovascular training makes the heart more efficient. It pumps more blood with each beat (stroke volume increases), so to meet the body's resting needs, the heart doesn’t need to beat as often. The autonomic nervous system also shifts toward greater parasympathetic (calming) influence at rest, which slows the heart rate further. Together, these changes lower the resting heart rate as an adaptation to endurance activity.

That’s why decreased resting heart rate is the expected outcome. Increased resting heart rate would imply less efficiency, no change would suggest no adaptation, and an irregular heartbeat isn’t a typical training adaptation and could indicate a problem.