1. Throwing a baseball overhead
- Subscapularis
- Action: stabilizes shoulder joint and internally rotates the humerus within the glenoid fossa
- Innervation: The suprascapular nerve (C5-C6)
- Latissimus Dorsi
- Action: Adduction, internal rotation, and extension of the arm
- Innervation: The thoracodorsal nerve
2. Kicking a ball
- Hamstrings
- Action: Flexion and extension of the knee
- Innervation: Sciatic nerves
- Rectus Femoris
- Action: Extension of the knee and flexion of the hip
- Innervation: The femoral nerve
3. Doing sit-ups
- Rectus Abdominis
- Action: Flexion of the anterior trunk.
- Innervation: Thoracoabdominal nerves
- Transverse abdominis
- Action: Provides support to abdominal structures and trunk
- Innervation: Lower intercostal nerves
4. Breathing
- Diaphragm
- Action: Contraction and flattening, leading to the increase in size of chest cavity
- Innervation: Phrenic nerve.
- External intercostal muscle
- Action: Elevation of the rib cage.
- Innervation: Intercostal nerves