Which metric is typically assessed by the sit-and-reach test?

The sit-and-reach test is specifically designed to assess flexibility, particularly in the lower back and hamstring muscles. It evaluates how far an individual can reach forward while sitting with legs extended, directly measuring the range of motion in the hip joints and lower back. This test is commonly used in fitness assessments to determine an individual's flexibility level, which can be an important factor in overall physical fitness and performance in various activities.

In contrast, the other metrics mentioned, such as cardiovascular endurance, muscular strength, and agility, focus on different aspects of physical fitness, such as aerobic capacity, muscle power and endurance, and quickness of movement, respectively. Therefore, it is clear that the sit-and-reach test directly aligns with the measurement of flexibility.