In terms of physical education, what does increased cardiac output signify?

Increased cardiac output indicates that the heart is pumping a larger volume of blood per minute, which is essential during physical activity. This enhancement in blood flow leads to improved delivery of oxygen and nutrients to the muscles and other tissues that require them for energy production. During exercise, the body's demand for oxygen rises significantly, and an increase in cardiac output allows for this greater demand to be met efficiently. As a result, muscles can perform better and sustain activity for longer periods, contributing to overall improved physical performance and endurance.