
Concentrically accelerates spinal extension, rotation, and lateral flexion
Superficial Erector Spinae: Iliocostalis, Longissimus, and Spinalis

Concentrically produces scapular retraction and downward rotation
Rhomboid Major

Concentrically accelerates shoulder flexion (clavicular fibers), horizontal adduction, and internal rotation
Pectoralis Major

Concentrically accelerates shoulder internal rotation, adduction, and extension
Teres Major

Concentrically accelerates elbow flexion, supination of the radioulnar joint, and shoulder flexion
Biceps Brachii

Spinal lateral flexion
Quadratus Lumborum

Concentrically produces scapular retraction and downward rotation
Rhomboid Minor

Concentrically protracts the scapula
Pectoralis Minor

Concentrically accelerates shoulder external rotation
Teres Minor

Concentrically accelerates elbow extension and shoulder extension
Triceps Brachii

Concentrically accelerates spinal extension and contralateral rotation
Multifidus

Concentrically accelerates scapular depression
Lower Trapezius

Concentrically accelerates shoulder flexion and internal rotation
Anterior Deltoid

Concentrically accelerates shoulder external rotation
Infraspinatus

Concentrically accelerates elbow flexion
Brachioradialis

Concentrically accelerates shoulder extension, adduction, and internal rotation
Latissimus Dorsi

Concentrically accelerates scapular retraction
Middle Trapezius

Concentrically accelerates shoulder abduction
Medial Deltoid

Concentrically accelerates shoulder internal rotation
Subscapularis

Concentrically accelerates elbow flexion
Brachialis

Concentrically accelerates scapular protraction
Serratus Anterior

- Concentrically accelerates cervical extension, lateral flexion, and rotation
- Concentrically accelerates scapular elevation
Upper Trapezius

Concentrically accelerates shoulder extension and external rotation
Posterior Deltoid

Concentrically accelerates abduction of the arm
Supraspinatus
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