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?
In a couple of words
During warm-up, heart rate gradually increases. During exercise, heart rate further increases to meet the increased demand for oxygen and fuel by the muscles. During cool-down, heart rate gradually decreases. During rest, heart rate returns to its resting state.
These changes impact the strength of the heart muscle by placing it under stress and requiring it to pump more blood to meet the increased demands during exercise. This helps in strengthening the heart muscle and improving its efficiency in pumping blood. Over time, regular exercise and fluctuation in heart rate during different phases can lead to improved cardiac function and increased strength of the heart muscle.