How does blood supply to muscles during exercise relates to the change in pulse rate?

During exercise, the demand for oxygen and nutrients in muscles increases, leading to enhanced blood flow to these areas. This increased demand triggers the heart to pump more vigorously, resulting in an elevated pulse rate. As muscles work harder, vasodilation occurs, allowing more blood to flow through the arteries, which further contributes to the increase in heart rate to meet the metabolic needs of the body. Thus, the change in pulse rate is directly linked to the heightened blood supply required by exercising muscles.