Improve alignment and posture, build strength in the back and core muscles, and take stress off the lower back with corrective exercise specialist and IDEA trainer of the year Justin Price. Price"s proven techniques focus on correcting muscular imbalances—the root of most back problems and injuries-and retraining the spine and spinal erectors to increase range of movement. Having a healthy back will give you a healthy foundation on which to build your fitness. Best of all, you can adapt each sequence and exercise to your fitness level.