Pectoralis major

Insertion:

–Near the intertubercular groove of the humerus

•Actions:

–Flexion, horizontal flexion, internal rotation, adduction

•Used in bench press, push-up, pull-ups, throwing, tennis serves

Pectoralis major

•Origin:

–Clavicle, sternum, and costal cartilage of ribs

–Flexion, horizontal flexion, internal rotation, adduction

•Used in bench press, push-up, pull-ups, throwing, tennis serves

Latissimus Dorsi

•Origin:

–Vertebrae, sacrum, ilium

•Actions:

–Extension (prime mover), adduction, internal rotation, horizontal extension

Latissimus Dorsi

•Insertion:

–Near the intertubercular groove of humerus

•Actions:

–Extension (prime mover), adduction, internal rotation, horizontal extension