The posterior fibres of gluteus medius contract to produce hip extension, lateral rotation and abduction.
The provider will grab your foot with both hands and rotate it to the outside (lateral rotation) while a downward force is applied to the foot.
When the anterior surface of the femur turns outward, this is lateral rotation of the hip.
Each muscle of the lateral rotator group causes lateral rotation of the thigh.
Further, "if the latissimus dorsi are used to do the spinal extension , they will interfere with the lifting and lateral rotation of the arms".
Turning the head to look to the side is lateral rotation, and bringing it back to the center is medial rotation.
To examine the shoulder, the patient is lying and the concerned arm is in lateral rotation.
Other muscles that contribute to lateral rotation of the hip include:
The brace principally contracts to allow for lateral and longditutal rotation and movement.
If the turnout does not happen at the hip (which tenses this ligament) it would instead occur via lateral rotation in the knee joint.