Action of muscles

Biceps

Supination, elbow flexion, weak flexion of shoulder

Triceps

Elbow extension

long head - extension and adduction of arm

Pectoralis Major

Flexion addiction and internal rotation of arm; accessory muscle for inspiration

Latissimus Dorsi

Extension, addiction, and internal rotation of arm; assists in inspiration and expiration

Deltoid

Abduction extension and external/internal rotation of arm

Trapezius

External rotation, elevation

Rectus Abdominis

Election of trunk, aids in force expiration

Gluteus Maximus

Extension of leg at hip, external rotation of leg at hip

Quadriceps

Extension of knee; Rectus femoris - hip flexion; stabilize of the patella

Hamstrings

Semi-tendinosus/ Semi-membranous- extend hip, flex knee, internal rotation

Biceps femoris- extension hip, knee flexion, external rotation

Gastrocnemius

Plantarflexion and flexion of the knee