Which assessment is best for determining muscular endurance?

The curl-up test is the best assessment for determining muscular endurance because it specifically targets the endurance capacity of the abdominal muscles. This test evaluates how many curl-ups a person can perform continuously without rest, which directly reflects the ability of these muscles to sustain repeated contractions over time. Muscular endurance refers to the ability of a muscle or group of muscles to exert force against resistance over a prolonged period without fatigue.

In contrast, the other assessments focus on different fitness components. The 1-mile run test is primarily used to measure cardiovascular endurance, not muscular endurance. The maximal bench press test assesses muscular strength by determining the maximum amount of weight a person can lift for one repetition, rather than their ability to perform repeated movements. The vertical jump test evaluates explosive power and strength rather than endurance. This makes the curl-up test the most appropriate choice for assessing muscular endurance.