- Throwing a baseball overhead - Pectoralis major (origin: clavicle, sternum, and costal cartilages of ribs 2-6; innervation: medial and lateral pectoral nerves), Latissimus dorsi (origin: spines of T7xL5, lumbar vertebrae, crests of sacrum and ilium)
- Kicking a ball - Ilipsoas (origin: transverse processes and bodies of lumbar vertebrae; innervation: lumbar spinal nerves L2-L3), rectus femoris (origin: anterior inferior iliac spine; innervation: femoral nerve)
- Doing sit-ups - Rectus abdominis (origin: pubic crest and pubic symphysis; innervation: thoracic spinal nerves T7-T12), Transversus abdominis (origin: iliac crest, inguinak ligament, lumbar fascia, cartilages of ribs 5-10; innervation: thoracic spinal nerves T8-T12, iliohypogastric nerve, ilioinguinal nerve)
- Breathing - Diaphragm (origin: xiphoid process of sternum, costal cartilages and adjacent portions of ribs 7-12, lumbar vertebrae; innervation: phrenic nerve, which contains axons from cervical spinal nerves C3-C5), External intercostals (origin: inferior border of rib above; innervation: thoracic spinal nerves T2-T12)
Reference:
Tortora, & Derrickson. (2012). Chapter 11: The Muscular System. In Principles of anatomy and physiology (13th ed.).