refers to any activity that increases oxygen intake and heart rate and keeps them elevated for at least 20 minutes.  Aerobic true VO₂ false Lungs false Single defined as the maximum capacity of the cardiovascular system to circulate oxygen and of the muscular system to utilize oxygen.  VO₂ true Lungs false Heart rate reserve (HRR) false Single Paired organs that bring blood from within the body close to the air from outside the body, in order to expel carbon dioxide from all parts of the body and absorb oxygen to circulate to the body.   Heart rate reserve (HRR) false Heart false Lungs true Single the difference between maximal heart rate (highest heart rate in vigorous activity) and resting heart rate (lowest heart rate at rest).  Heart rate reserve (HRR) true Heart false Cardiorespiratory endurance false Single A muscle that continuously pumps blood to the lungs and the rest of the body.  pulmonary circulation  false Heart true Cardiorespiratory endurance false Single The ability of the cardiovascular system to maintain its function during continuous physical activity- walking, jogging, running, cycling.  pulmonary circulation  false Blood vessels false Cardiorespiratory endurance true Single blood from all over the body flows from the right side of the heart toward the lungs.  pulmonary circulation  true Blood vessels false Rating of perceived exertion (RPE) false Single A system of arteries, veins, and capillaries that transports blood to and from the heart.  The beep test false Blood vessels true Rating of perceived exertion (RPE) false Single the subjective measure of the intensity of exercise based on how the participant feels; a subjective assessment of effort.   The beep test false Aerobic false Rating of perceived exertion (RPE) true Single This test predicting maximal oxygen consumption is excellent for people who are physically fit and wish to measure their capacity for high-intensity exercise, such as sprints.  The beep test true Aerobic false Lungs false Single