What is the meaning of "muscular strength"?

Muscular strength refers specifically to the maximum amount of weight that a person can lift during a single, maximal effort, which highlights the capability of muscles to exert force against resistance. This definition is crucial in understanding strength training, as it emphasizes the importance of maximum force generation within a short duration, rather than endurance or energy output over time.

Endurance, which is characterized by how long a muscle can sustain a contraction, is distinctly different from strength as it focuses more on prolonged activity rather than maximal force. The ability to exert force rapidly pertains more to muscular power, which combines strength and speed, rather than muscular strength alone. Lastly, energy output during a workout session encompasses various factors, such as cardiovascular conditioning and endurance, rather than the isolated capability of lifting weight. Thus, the correct choice encapsulates the essence of muscular strength effectively.