Muscles and Movement

Biceps Femoris

Knee flexion and hip extension

Gluteus Maximus

Hip extensor and external rotator

Gluteus Medius

Hip abductor and stabilizer

Tensor Fasiae Latae

Assists with hip abduction and flexion.

Rectus Femoris

Hip flexor and knee extensor

Iliacus iliosas

Hip flexor

Adductor Magnus

Hip extensor and adductor

Erector Spinae

Spine extensor, rotation and lateral flexion

Rectus Abdominis

Spine flexion

Transverse Abdominis

Spine stabilizer

Pectoralis Major

Shoulder horizontal adduction and shoulder flexion

Trapezius

Upper - elevate/retract Mid - retraction Lower - retraction/depression

Latissimus Dorsi

Shoulder extension and adduction

Vastus Muscles

Knee extension and stabilization

Gastrocnemius

Plantar flexor and knee flexor

Soleus

Plantar flexor

Semitendinosus

Knee flexor and hip extender

Semimembranosus

Knee flexor and hip extender

Teres Major

Adduct humorous, shoulder extensor

Rhomboids

Scapula retraction

Biceps Brachii

Elbow flexion and supination

Brachioradialis

Elbow flexor

Neutral or pronated may activate more

Brachialis

Elbow flexor

Triceps Brachii

Concentric elbow extensor

Eccentric elbow flexor

Deltoids

Anterior - Shoulder flexor

Medial - Shoulder abductor

Posterior - Shoulder extensor and horizontal abductor

Rotator Cuff

Four muscles

Stabilize head of humerus in the socket

Supraspinatus

Shoulder abductor

Infraspinatus

External Rotator

Teres Minor

External rotator

Subscapularis

Internal rotator