Its insertion is olecranon process of ulna. Intended action is long head, and exercise is skull crushers. Fourth is Biceps Brachii. Origin is scapula. Its insertion is tuberosity of radius and bicipital aponeurosis. Intended action is flexion of elbow and dumbbell biceps curl as exercise. Fifth is Anterior Deltoid, with the origin as anterior lateral third of the clavicle. Insertion is deltoid tuberosity on lateral humerus, intended action is abduction and flexion and exercise is dumbbell anterior deltoid raise. Sixth is Medial Deltoid. Origin is scapula, insertion is deltoid tuberosity on lateral humerus, intended action is abduction of the shoulder joint, and exercise is dumbbell lateral raise. Seventh is Posterior Deltoid with the origin as scapula, insertion is deltoid tuberosity on lateral humerus, intended action is abduction, extension and rotation while exercise is dumbbell posterior deltoid raise (Alcamo & Bergdahl, 2003, p.68).
The eighth muscle is Trapezius, origin is the base of skull, insertion is the base of the scapular spine, intended action is elevation and depression, exercise is barbell shrugs. The ninth is Rectus Abdominis, origin is superior surface of pubis, insertion is costal cartilages, and intended action is depresses ribs, and exercise is crunches. Tenth is the External Oblique, origin is ribs, insertion is linear alba and iliac crest, intended action is flexes and depresses ribs, exercise is standing side twists. Eleventh is Gluteus Maximus, origin is illium and sacrum, insertion is the oblique ridge of the greater trochanter, intended action is the extension and rotation of hip, exercise is standing. Twelfth muscle involves Rectus Femoris, origin is anterior iliac spine of the illeum, insertion is patella, intended action is the flexion of hip, and exercise is leg extensions. The thirteen is the Biceps Femoris, origin is ischial tuberosity, insertion is lateral condoyle of tibia, intended action is flexion