From stabilization exercise to core training, the literature is loaded with buzz words and catch phrases. The body doesn't know, or care, about these descriptive titles. A thorough understanding of spinal mechanics and resistance forces is necessary for good exercise design. Gain an understanding of the rules of the body by exploring the intricate world of joints, forces and muscles. Learn to examine the specific functions of individual muscles and their relationship to spinal mobility, and explore the truth about various forms of passive stretching.