Five is an unlucky number for many people with spondylolysis (spon-dee-low-LYE-sis), because this condition—a weakness or stress fracture of a spinal bone—is most often found near the fifth lumbar vertebra in the lower back. It may, however, occur in other lumbar vertebrae, as well as in the chest area. Spondylolysis is often caused by overuse, especiallyContinue Reading »