The lumbar spine includes the five vertebrae in your lower back numbered L1 to L5. These bones help provide mobility and stability to your back and spinal column and are an attachment point for many ...

Hunched over a desk all day? Science shows that weak iliopsoas muscles are the hidden culprit behind chronic back pain, but ...

What Is the Psoas Muscle? The psoas (pronounced so-ezz) muscles are two large muscles in your lower back. You have one on either side of your spine. They're the main muscular connection between your ...

The back consists of large, complex muscles that support your trunk and spine. There are many types of back muscles, and they are all essential, helping you walk, bend, twist, and hold your body ...