| ACTIVITY | MUSCLES INVOLVED | ACTION | INNERVATION | |||
| Turning a door knob | supinator | Supinates forearm at radioulnar joints | Deep radial nerve | |||
| pronator teres | Pronates forearm at radioulnar joints and weakly flexes the forearm at elbow joint | Median nerve | ||||
| pronator quadratus | Pronates forearm at radioulnar joints | Median nerve | ||||
| Throwing a baseball overhead | Subscapularis | Medially rotates arm at shoulder joint | upper and lower subscapular nerve | |||
| deltoids | Abducts arm at the shoulder; medially rotates the arm at the shoulder | axillary nerve | ||||
| pectoralis major | Adducts and medially rotates arm at the shoulder joint; flexes arm; extends the arm | medial and lateral pectoral nerves | ||||
| Kicking a ball | Rectus Femoris | Extend the leg at the knee joint and flexes at the hip joint | femoral nerve | |||
| Semitendinosus | Flexes leg at the knee joint and extends thigh at hip joint
|
tibial nerve from the sciatic nerve | ||||
| Biceps Femoris | Flexes leg at the knee joint and extends thigh at hip joint | tibial and Fibular nerves from the Sciatic nerve | ||||
| Doing sit-ups | Iliopsoas | Flexes the thigh at the hip joint | innervated from the L2-4 nerve roots of the lumbar plexus | |||
| transversus abdominis | Supports abdominal wall; conjoint tendon supports the posterior wall of the inguinal canal | anterior primary rami; conjoint tendon ilioinguinal nerve | ||||
| Internal obliques | compress the abdomen and flex the vertebral column | thoracic spinal nerves | ||||
| Walking | Gluteus medius | abducts thigh at the hip joint and medially rotates thigh | superior gluteal nerve | |||
| Gastrocnemius | flexes foot at the ankle joint and flexes leg at knee joint | tibial nerve | ||||
|
soleus |
plantar flexes the foot at the ankle | tibial nerve | ||||
| Breathing | Diaphragm | contracts for inhalation and relaxes for exhalation | phrenic nerve | |||
| Rectus Abdominis | pushes the ribs down during vigorous expiration, trunk flexion, and abdominal viscera compression | intercostal nerves | ||||
| intercostal muscle | pull the rib cage down and force air out of the lungs | thoracic spinal nerves |