1. Major Muscles of the Body
Sports Medicine

2. Deltoid Origin Insertion Action Clavicle Scapula Humerus
Flexion/Extension the arm
Internal rotation of arm
Abduction of arm

3. Pectoralis major Origin Insertion Action Clavicle & Sternum Humerus
Flexion/Extension of arm
Internal rotation of arm
Adduction of arm

4. Biceps brachii Origin Insertion Action Scapula Radius
Flexion of forearm
Supination of forearm
Flexion of shoulder (slightly)

5. Rectus abdominus Origin Insertion Action Pubic crest
Xiphoid process: sternum
Ribs
Action
Flexion of vertebrae column

6. brachioradialis Origin Insertion Action Humerus Radius
Flexion of forearm

7. Vastus lateralis Origin Insertion Action Greater trochanter of femur
Quadriceps tendon which connects to patella
Action
Extension at knee

8. sartorius Origin Insertion Action Iliac spine Tibia Hip flexion
Knee flexion
Lateral rotation of hip

9. Rectus femoris Origin Insertion Action Iliac Ilium
Quadriceps tendon which connects to patella
Action
Extension of knee

10. Vastus medialis Origin Insertion Action Medial surface of femur
Quadriceps tendon which connects to patella
Action
Knee extension

11. Tibialis anterior Origin Insertion Action Lateral tibia Tarsals
First metatarsal
Action
Dorsiflexion
Inversion

12. soleus Origin Insertion Action Fibula Posterior of tibia
Posterior calcaneus
Action
Plantar flexion

13. gastrocnemius Origin Insertion Action Lateral & medial of femur
Posterior of calcaneus
Action
Plantar flexion
Flexion of knee

14. semitendinosus Origin Insertion Action Ischium Medial surface of tibia
Flexion of leg
Internal rotation of leg
Extends thigh

15. semimembranosus Origin Insertion Action Ischium Medial of tibia
Flexion of leg
Internal rotation of leg
Extends thigh

16. Biceps femoris Origin Insertion Action Ischium Femur Fibula
Lateral tibia
Action
Flexion of leg
External rotation of leg
Extends thigh

17. Gluteus maximus Origin Insertion Action Sacrum Coccyx Ilium Femur
Extension of thigh at hip

18. triceps brachii Origin Insertion Action Humerus Ulna
Extension at elbow

19. Latissimus dorsi Origin Insertion Action
Sacral, lumbar, lower thoracic vertebrae
Iliac crest
Lower ribs
Insertion
Humerus
Action
Extension of arm
Adduction of arm
Internal rotation of arm
Retraction of shoulder
Depression of shoulder

20. trapezius Origin Insertion Action Occipital bone (skull)
Cervical and thoracic vertebrae
Insertion
Clavicle
Spine
Scapula
Action
Shoulder rotation
Elevation of shoulder
Retraction of shoulder
Depression of shoulder