Let’s count them up. In our spines, we have 26 bone disks, or vertebrae. When you add to that a few decades (or more) of life, our chances for back pain really stack up – so it’s no wonder the World Health Organization estimates that 60 to 70 percent of us will experience lower back pain as we age. The truth, which is no surprise, is that along with aging comes wear and tear in all our joints; our vertebrae are not immune. And degenerative spine is the most common cause of that back pain in older adults.