Medial rotation refers to the movement of a body part towards the midline of the body. It occurs when a body part turns inward, closer to the center of the body.
Full definition
On the other hand, a flawlessly executed quadruped row promotes optimal depression, retraction and
medial rotation of the scapula, improves arm and grip mechanics and spinal rigidity, and teaches strong muscle - mind connection with the lats.
Hip joint internal rotation (sometimes also
called medial rotation) occurs when the femur rotates within the hip joint, toward the mid-line of the body.
Both the sternal - costal and clavicular heads of the pectoralis major are responsible for the adduction,
medial rotation and transverse flexion of the upper arm.
As a whole (all heads working together), the pectoralis major assists adduction (lowering upper arm from side raise position to the midline of the body),
medial rotation (rotating upper arm forward or inward to the midline of the body) and horizontal flexion (moving the upper arm from a side raise position to the front of the body).
This will correct
any medial rotation and also prevent it from happening in the first place.
If they turn towards the midline of the body (
medial rotation) your semi-tendinosus and your semi membranosus are too strong for your biceps femoris.
Follow the movements shown in the videos; flexion, lateral rotation,
medial rotation, abduction and horizontal flexion / extension.
The gluteus minimus has the same action as the gluteus medius, that is abduction and
medial rotation.