Physical therapist Owen Lewis digs into a wide range of metaphors and frameworks used to understand the core. Lewis argues for an approach that is also flexible, fluid, and adaptable: the same exercises may not be appropriate for every person, and may need to be changed up over time. Lewis clearly explains how the core works to manage and transfer the force of movement through the center of the body, building on principles of biotensegrity (how the tension and compression of different muscles creates a balanced structure which distributes stress and strain). Lewis emphasizes functional training and underlying principles over a static list of exercises, providing the groundwork for tailored, individual training to improve core function. Supplemented throughout with color photos and a diverse range of models, this book makes it easy to understand the anatomy of this crucial region of the body.