High School Health Practice Exam

Cardiorespiratory fitness measures how efficiently the heart, lungs, and blood vessels deliver oxygen to working muscles during sustained activity. Because this describes the heart and circulatory system’s ability to support ongoing aerobic effort, the standard label for this fitness component is cardiovascular fitness, which is essentially the same thing. Improving it comes from rhythmic, endurance-type activities such as running, cycling, or swimming, which train the heart and lungs to work more efficiently and raise VO2 max. Muscular endurance focuses on how long muscles can keep contracting, flexibility is about how much joints can move through their range of motion, and while aerobic endurance relates to sustained oxygen-using activity, the term that equals cardiorespiratory fitness in common usage is cardiovascular fitness.