Back Your Back: Back and Muscle Injury Prevention (1992)
thefilmarchived.blogspot.com Back injuries result from damage, wear, or trauma to the bones, muscles, or other tissues of the back. Common back injuries include sprains and strains, herniated disks, and fractured vertebrae. The lumbar is often the site of back pain. The area is susceptible because of its flexibility and the amount of body weight it [...]