The spine is a complex structure, comprised of nerves, connective tissue, bones, discs, muscles and other essential integrative components. Whether it getting out of a chair or car, lifting or carrying items, some 29 muscles around the pelvic girdle and lumbar spine, provide stability. In this article, we will review the anatomy of the spine, common injuries to the lumbar spine, functional assessments and training strategies to work with clients with previous injuries.