How is muscular strength defined?

• A. The body's endurance to sustain activity for extended periods.
• B. The level of flexibility in joints.
• C. The maximum rate at which the heart can pump.
• D. The body's maximum ability to move an object for one repetition.

Answer: (D)

Muscular strength is the maximum amount of force a muscle or muscle group can generate in a single effort. This is usually measured as a one-repetition maximum — the heaviest weight you can lift, push, or move for one repetition with proper form. This definition focuses on peak force in one move, not how long you can sustain something or how many repetitions you can perform afterward.

The other concepts describe different capacities: endurance refers to sustaining activity over time, flexibility concerns the range of motion in joints, and maximal heart-pumping rate reflects cardiorespiratory capacity. So the definition aligns with the idea of the body’s maximum ability to move an object for one repetition.