Final answer:
A proper warm-up allows the heart rate to return near resting levels and blood flow to adjust.
Step-by-step explanation:
A proper warm-up allows the heart rate to return near resting levels and blood flow to adjust - True. A warm-up is an essential part of any exercise routine as it prepares the body for physical activity. During a warm-up, the heart rate gradually increases, allowing the cardiovascular system to adjust and deliver oxygen-rich blood to the working muscles. It also helps prevent injury and improve performance.