Stance Phase

Shoulder Girdle

R and L: elevation and upward rotation

Muscles (agonists): levator scapulae, serratus anterior, upper and middle trapezius, rhomboids

Contraction: Isometric

Shoulder Joint

R and L: Flexion

Muscles: anterior deltoid, upper pectoralis major

Contraction: Isometric

Elbow Joint

R and L: Flexion

Muscles: biceps brachii, brachialis, brachioradialis

Contraction: Isometric

Radioulnar Joint

R and L: pronation

Muscles: pronator teres, pronator quadratus

Contraction: Isometric

Wrist

R and L: extension

Muscles: extensor carpi ulnaris, radialis brevis and longus

Contraction: Isometric

Hand

R and L: extension

Muscles: extensor digitorum, indicis, digiti minimi, pollicis longus and brevis

Contraction: Isometric