Shoulder Complex Anatomy and Hypertrophy

Describe the origin, insertion, and fiber direction of the anterior, lateral, and posterior deltoid heads.

Identify the specific joint actions of each deltoid head and classify their roles across various movements.

Explain the lengthened and shortened positions of each deltoid head by analyzing their anatomy and joint actions.

Select an optimal exercise for each deltoid head that challenges the muscle through a large range of motion, emphasizing the lengthened position.

Identify the four rotator cuff muscles and describe their primary individual actions and collective function as dynamic stabilizers of the shoulder joint.

Explain why rotator cuff health is critical for safe and effective execution of heavy compound lifts.

Analyze common shoulder training faults (e.g., impingement patterns, poor scapular mechanics) using anatomical principles.

Formulate anatomical coaching cues to correct common shoulder training mistakes and improve exercise execution.