CSCS Scientific Foundations Complete Practice Exam 2026

Muscular fitness encompasses the capabilities of muscles in various domains essential for physical performance and overall health. This typically includes muscular strength, which is the maximum amount of force a muscle or muscle group can produce; muscular endurance, the ability of a muscle to sustain repeated contractions over time; and muscle power, which refers to the ability to exert force quickly and is a combination of strength and speed.

Flexibility, while important for overall fitness and injury prevention, does not fall under the category of muscular fitness. It relates more to the range of motion around joints and the ability to move muscles and connective tissues through their full spectrum of motion. In contrast to the components of muscular fitness, flexibility is often categorized under general physical fitness or mobility and is essential for functional movement, but it does not directly measure the capabilities of the muscles in terms of strength, endurance, or power. Thus, it is appropriate to identify flexibility as the component that is not typically considered part of muscular fitness.