Introduction Many of the constituent components that make up the lumbar spine have been characterized at various load rates@ and their associated injury mechanism determined and scored. Studies focusing on the less severe end of the complaint/injury spectrum have reported a link between low back complaints and a wide range of factors@ including heredity@ obesity@ age@ occupational/sports activities@ cardiovascular risk factors@ and depression. Some of the most painful and resource-intensive conditions involve lumbar spine fracture or soft tissue failure from a variety of different insults to the body@ including falls@ contact sports@ vehicle collisions@ aircraft ejection@ and underbody blasts from roadway explosions. Each of these environments results in a different kinematic response of the spine as a consequence of loading parameters@ including direction@ magnitude@ and duration. This chapter will focus on vehicle-related lumbar injury@ but when there is a natural link to other injury scenarios@ mechanisms@ or spinal regions@ this chapter will seek commonality with those as well. It is hoped that this approach will foster synergistic efforts (and benefits) among the various disciplines and specialties.