The core is a collection of muscles which stabilize and move the spine These muscles engage first during movement or breathing to protect the spinal column. The core stabilizes and protects the spine by creating stiffness that limits excessive movement in any direction. The most common of these muscles are the abdominals, however the core is much more than just a six pack. Healing Health & Fitness has a range of exercised to strengthen the whole core to provide you with flexibility, transverse strength & stability.