Which of the following is a common test used to measure flexibility?

The sit-and-reach test is commonly used to measure flexibility, particularly in the hamstrings and lower back. This test involves a straightforward procedure where an individual sits on the floor with their legs extended straight ahead. They then reach forward as far as possible toward their toes, and the distance reached is measured. The sit-and-reach test effectively assesses flexibility because it focuses on muscle groups that are important for overall mobility and functional movement. By measuring how far the participant can reach, practitioners can evaluate flexibility levels accurately, making it a widely adopted method in both fitness assessments and physical education.

In contrast, the other options refer to tests that measure different fitness components, such as power (the vertical jump test), endurance (the beep test), or core stability and strength (the plank hold test). These tests do not assess flexibility, highlighting the specific role of the sit-and-reach test as a standard measure for this physical attribute.