Explain how your heart rate changes during warm-up, exercise, cool-down, and rest. How do these changes impact the strength of the heart muscle?
During warm-up, the heart rate increases gradually as the body prepares for physical activity. During exercise, the heart rate increases significantly to supply more oxygen to the muscles. During cool-down, the heart rate gradually decreases as the body returns to a resting state. During rest, the heart rate returns to its normal resting rate.
These changes impact the strength of the heart muscle in several ways. During exercise, the heart muscle is working harder to pump more blood and oxygen to the body, which can strengthen the muscle over time. Regular exercise can also improve the heart's efficiency, allowing it to pump more blood with less effort. Meanwhile, during rest, the heart is able to recover and rest, allowing it to be ready for the next physical activity. All of these changes help to improve the strength and overall health of the heart muscle.