What type of exercise primarily focuses on building muscular endurance?

Building muscular endurance is primarily achieved through activities that involve repetitive motions against a moderate load over an extended period. Weightlifting with low resistance is particularly effective for this purpose, as it allows individuals to perform a high number of repetitions without fatiguing the muscles too quickly. This type of exercise trains the muscles to sustain prolonged activity, enhancing their ability to continue performing tasks over time.

Cycling can also enhance endurance, but it primarily improves cardiovascular endurance rather than muscular endurance. Swimming at high speeds focuses more on cardiovascular enhancement and anaerobic capacity. While flexibility stretching is important for improving the range of motion and preventing injuries, it does not contribute to muscular endurance development. Therefore, weightlifting with low resistance stands out as the most direct means of enhancing muscular endurance through its emphasis on sustained muscle contractions.