The primary components of cardiovascular fitness include aerobic capacity, muscular endurance, and heart health. Aerobic capacity refers to the body's ability to efficiently use oxygen during extended physical activities, which is essential for overall stamina. Muscular endurance allows individuals to sustain physical exertion over time, important for activities like running or cycling. Maintaining heart health involves regularly engaging in activities that strengthen the heart and lower blood pressure, ultimately improving the body’s ability to perform daily tasks. These components are essential in developing a well-rounded fitness program.