ACSM Personal Trainer Certification Practice Exam

Which action do the gluteus medius and minimus perform at the hip?

1. Adduction

2. Abduction

3. Flexion

4. Extension

The correct answer is: Abduction

The gluteus medius and gluteus minimus primarily function as hip abductors. Their main role is to pull the thigh away from the midline of the body during activities such as walking, running, and balancing. This action is especially important for stabilizing the pelvis while standing on one leg, as it helps prevent excessive dropping of the hip on the opposite side. Abduction is critical for the control of lateral movement and contributes to overall pelvic stability, which is vital for proper gait and functional movements. This ability to stabilize the pelvis allows for efficient movement patterns and reduces the risk of injury, particularly in activities that require lateral movements or changes in direction.