A neuromuscular efficient core is required for the latissimus dorsi to provide the necessary forces to carry out some function at the glenohumeral joint.

Neuromuscular inefficiency sets up the foundation for repetitive stress and associated “frozen shoulder”-type symptoms. The latissimus dorsi decelerates lateral rotation, flexion, and abduction of the humerus in the glenohumeral joint.

When the insertion of the latissimus dorsi is flexed, the muscle plays a role in tilting the pelvis in an anterolateral direction.

A bilateral contraction leads to hyperextension of the lower back, with accompanying anterior tilting of the pelvis.

A muscle this size, covering so much of the posterolateral ribcage, will also have an influence on diaphragmatic function.

Any movement of the humerus will have an effect that extends into the thoracolumbar fascia and further down the kinetic chain.

The latissimus dorsi generates pain in the mid-thoracic area, including the posterolateral abdominal region.

Pain of an aching nature is often reported in the inferior angle of the scapula and the posterior shoulder.

Referred pain travels down the medial aspect of the humerus into the forearm, hand, and fingers.

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