How does the SBP typically change during dynamic exercise?

During dynamic exercise, systolic blood pressure (SBP) typically progresses to increase. This increase occurs due to the higher demand for oxygen and nutrients by the working muscles. As exercise intensity rises, the heart pumps more blood to meet these metabolic needs, resulting in increased cardiac output. The systemic vascular resistance also plays a role, as active muscles cause vasodilation which helps accommodate increased blood volume flow.

In contrast, SBP does not decrease or remain constant during moderate to high-intensity rhythmic activity and only increases with heavy lifting. While lifting weights might lead to significant spikes in blood pressure, dynamic exercise like running, cycling, or swimming usually results in a consistent and progressive increase in SBP as the body works harder to supply muscles with needed oxygen during continuous movement. Understanding this relationship helps in assessing cardiovascular responses to different types of exercise.