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? Explain is 1-2 sentences
During warm-up, the heart rate gradually increases to prepare the body for physical activity. During exercise, the heart rate further increases to meet the increased oxygen demand. During cool-down, the heart rate gradually decreases towards resting levels. These changes in heart rate during different phases of physical activity help strengthen the heart muscle by improving its efficiency and adaptability to varying workloads.
