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Throwing a Baseball Overhead
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Muscle: Deltoid
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Action: Lifts the arm away from the body and involves the flexing and rotating of shoulder
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Innervation: Axillary nerve
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Muscle: Triceps Brachii
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Action: Elbow extension and shoulder extension
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Innervation: Radial nerve
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Kicking a Ball
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Muscle: Quadriceps Femoris
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Action: Knee extension (extends the leg)
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Innervation: Femoral nerve
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Muscle: Gluteus Maximus
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Action: Keeps the knee straight (hip extension and lateral rotation)
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Innervation: Inferior gluteal nerve
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Doing Sit-Ups
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Muscle: Rectus Abdominis
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Action: Compression of the abdominal cavity
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Innervation: Lower six thoracoabdominal nerves (T7-T11)
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Muscle: Iliopsoas
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Action: Hip flexion
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Innervation: Femoral nerve
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Breathing
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Muscle: Diaphragm
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Action: Through contracting and pulling down during inhalation, it allows air into the lungs and enlarge the thoracic cavity
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Innervation: Phrenic nerve (C3-C5)
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Muscle: External Intercostals
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Action: Elevates the ribs during inhalation
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Innervation: Intercostal nerves
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