To prevent and manage low back pain, you need good pelvic alignment. For that, turn to your hip muscles! Hip muscles are located all around the joint: Front, outside, inside and in back. Here you'll meet 3 approaches to strengthening your hamstring muscles. Located at the back of your thigh and hip, hamstrings play an important role in keeping your low back in line. One approach to making strong hamstrings is to grab a mat or a piece of floor and do "land-based" exercises.