Abdominal muscles, Deep core muscles supporting the trunk., Ligament, Connects bone to bone., Femur, The longest bone in the body., Neutral spine, Maintain the natural curves of the spine., Pelvic stability, Engage the core to prevent unnecessary movement., Articulate, Move one segment at a time., Lengthen, Create space in the body., Contraindication, A condition when an exercise should not be performed., Regression, Safely modify an exercise to make it easier., Progression, Increase the challenge.

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