ACSM Personal Trainer Certification Practice Exam

Which muscle group is responsible for rotational movements at the hip joint?

1. Hamstrings

2. Quadriceps

3. Adductors

4. Gluteals

The correct answer is: Gluteals

The muscle group responsible for rotational movements at the hip joint is the gluteals. This group includes the gluteus maximus, gluteus medius, and gluteus minimus, all of which play key roles in hip stability and mobility. The gluteus maximus primarily contributes to hip extension and external rotation, while the gluteus medius and minimus aid in hip abduction and internal rotation. Together, they enable the hip joint to perform a range of rotational movements essential for activities such as walking, running, and changing directions. In contrast, while the hamstrings and quadriceps contribute to movements at the knee joint, they do not significantly facilitate rotation at the hip. The adductors are primarily involved in bringing the leg toward the midline of the body and assist in hip flexion and extension, but they have a limited role in rotation. Thus, the gluteals are the primary movers responsible for rotational actions at the hip joint.