- Throwing a baseball
- Deltoid muscle
- Action: Moves the arm away from the body (to abduct)
- Innervation: The axillary nerve
- Supraspinatus muscle
- Action: Initiates arm abduction
- Innervation: The suprascapular nerve.
- Infraspinatus muscle: Action
- Action: Externally rotates the arm
- Innervation: Suprascapular nerve.
- Gastrocnemius muscle
- Action: Points toes downward (to plantarflex the foot)
- Innervation: The tibial nerve
- Hamstring muscles (biceps femoris)
- Action: Extends the hip and flexes the knee
- Innervation: The sciatic nerve.
- Quadriceps (rectus femoris)
- Action: Extends the knee
- Innervation: The femoral nerve
- Transversus abdominis muscle
- Action: Stabilizes the core and supports abdominal compression
- Innervation: The lower six thoracoabdominal nerves
- External oblique muscle
- Action: Flexes the spine and assists in trunk rotation
- Innervation: The lower six thoracoabdominal nerves
- Rectus abdominis muscle
- Action : Flexes the spine so that it brings the chest towards the pelvis
- Innervation: The lower six thoracoabdominal nerves.
- Diaphragm muscle
- Action: Contracts and flattens to increase the volume of the thoracic cavity during inhalation
- Innervation: by The phrenic nerve.
- Intercostal muscles (external and internal)
- Action: Expands and contract the ribcage during breathing
- Innervation: The intercostal nerves.
- Scalene muscles (anterior, middle, and posterior)
- Action: Elevate the first and second ribs (during forced inhalation)
- Innervation: The cervical spinal nerves.