APA Dictionary of Psychology

the body’s ability to utilize oxygen during exercise; it is a manifestation of the health of the heart, lungs, blood vessels, blood cells, and muscles. Cardiovascular fitness can be stated as the maximum volume of oxygen the body can take in and use (VO2 max), as assessed in individuals using aerobic equipment such as treadmills and stationary bicycles. It can be improved through regular aerobic exercise. Increased cardiovascular fitness is associated with a lowered risk of heart disease, diabetes mellitus, and stroke, and it may also have a role in improved cognitive functioning and mental health. Also called cardiovascular health.