“Ab” exercises are out, Core exercises are in Strengthening your core musculature will help you reach your goal of a flatter, toned midsection and reduce low back pain. What is the “core”? Structures that form the lumbo-pelvic-hip complex (LPHC), which include:  lumbar spine, pelvic girdle, abdomen, and hip joint. What muscles make up the “core”? Local Stabilization System:  Muscles attach…