Board of Certification for the Athletic Trainer (BOC) Practice Test

What movement would be limited if weakness is noted in the hip external rotators?

1. Abduction

2. Adduction

3. External rotation

4. Internal rotation

The correct answer is: External rotation

If weakness is present in the hip external rotators, the primary movement that would be limited is external rotation. The hip external rotators, which include muscles such as the gluteus maximus, piriformis, and others, are responsible for rotating the thigh away from the midline of the body. If these muscles are weak, the ability to perform this movement is compromised, resulting in limited external rotation. Additionally, when the external rotators are weak, it can affect stability and control during movements that require external rotation, such as changes in direction, certain athletic movements, or even basic gait patterns. This limitation may also have secondary effects on movements that depend on external rotation as a component, creating challenges in overall hip function and mobility.