The major components of physical fitness include cardiovascular endurance, muscular strength, muscular endurance, flexibility, and body composition. Cardiovascular endurance refers to the ability of the heart and lungs to supply oxygen during sustained activity, while muscular strength pertains to maximal exertion capabilities. Muscular endurance focuses on the ability to perform repetitive tasks over time. Flexibility allows for a greater range of motion, and body composition reflects the proportion of fat to lean mass. These components together define an individual's overall fitness level.