What physiological change occurs with endurance training related to systemic vascular resistance?

Endurance training leads to several physiological adaptations that beneficially affect the cardiovascular system, one of which includes a decrease in systemic vascular resistance. This reduction is primarily due to the ability of blood vessels to dilate more effectively during physical activity.

With regular endurance training, there is an increase in the production of vasodilators, such as nitric oxide, which promotes the relaxation of vascular smooth muscle. Additionally, endurance training enhances endothelial function, which improves the responsiveness of blood vessels. These adaptations allow for a greater volume of blood to flow through the vascular system with less resistance, thereby reducing the overall systemic vascular resistance.

As a result, during exercise, trained individuals can achieve increased cardiac output with lower blood pressure due to this decreased systemic vascular resistance. This response not only facilitates improved oxygen delivery to muscles but also aids in better overall cardiovascular health and performance.