EVERYTHING You NEED to Know BEFORE Working Shoulders! (Part 1)

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In this video, I go over everything you need to know about shoulder anatomy and physiology, in order to maximize the effectiveness of your workouts. I describe all the seventeen different muscles that are directly involved in moving the glenohumeral joint (the shoulder), and break it down by movement:

Shoulder Flexion: Coracobrachialis, Biceps Brachii (long head), Pectoralis Major (clavicular head) Shoulder Abduction: Supraspinatus, Serratus Anterior, Biceps (short head)
Shoulder Extension: Latissimus dorsi, Teres major, Triceps Brachii (Long Head)
Shoulder Elevation: Trapezius (descending part), Levator Scapulae
Shoulder Retraction: Rhomboid Major, Rhomboid Minor, Trapezius (transverse part)
Shoulder Protraction: Serratus Anterior, Pectoralis Minor
Shoulder External Rotation: Infraspinatus, Teres Minor
Shoulder Internal Rotation: Subscapularis, Pectoralis Major
Shoulder Depression: Pectoralis Major, Pectoralis Minor, Trapezius (ascending part)

Key Timestamps:
0:00 Introduction
3:20 Coracobrachialis
4:35 Biceps (Long Head)
5:49 Pectoralis Major
7:23 Supraspinatus
8:28 Serratus Anterior
8:59 Biceps (Short Head)
10:11 Latissimus Dorsi
11:16 9 Triceps (Long Head)
13:23 Levator Scapulae
14:10 Rhomboid Major 13 Rhambaid Mirar
15:01 Pectoralis Minor
16:02 Infraspinatus
16:46 Teres Minor
17:11 Subscapularis