During exercise, what is the expected behavior of systolic blood pressure?

Systolic blood pressure is expected to increase with exercise intensity. As physical activity begins, the heart pumps more forcefully to meet the increased demand for oxygen in the muscles. This results in a rise in cardiac output, which subsequently raises systolic blood pressure. During moderate to vigorous exercise, this increase can be significant, and it is normal for systolic blood pressure to rise above resting values, depending on the intensity of the activity being performed.

In contrast, the other responses do not accurately describe the physiological response of systolic blood pressure during exercise. A statement that it remains constant overlooks the dynamic changes that occur during physical activity. A gradual decrease in systolic blood pressure is not typical during exercise, as the body's immediate response is to increase blood pressure to ensure proper blood flow. Finally, stating that it is always below 140 does not account for the possibility of higher values during exercise, especially at high intensity, where systolic blood pressure can often exceed this threshold based on the individual's fitness level and health status.