Which of the following best describes "muscular endurance" in weight training?

Muscular endurance refers to the ability of a muscle or group of muscles to sustain repeated contractions against resistance over a period of time. High repetitions with low weight optimize this component of fitness by allowing muscles to perform more work over an extended duration without significant fatigue. This training style promotes the efficiency and stamina of muscle fibers, making it particularly effective for activities requiring prolonged exertion, such as long-distance running or cycling.

In contrast, low repetitions with high weight primarily focus on building maximum strength, where the muscle is trained to exert great force but may not sustain that force over time. Static holds for strength emphasize isometric contractions, which do not relate directly to endurance. Finally, quick explosive movements typically target power and speed rather than endurance, making high repetitions with low weight the most relevant method for training muscular endurance.