Basic Physical Fitness contains the following: - Aerobic (cardiovascular) Fitness: The ability to take in and supply your body with oxygen during exercise. - Muscular Fitness: Muscle strength, power and endurance. - Flexibility: The ability to stretch muscles and move joints through a full range of motion. - Body Composition: The proportion of body-fat mass to lean body mass. To be at your best physically, include all of these basic components in your fitness program.