Psoas muscle attaches to your lower spine and to your thigh bone. If it's tight (sitting too much?) it pulls your lower back. It's one of the common causes of lower BACK PAIN! If you can stretch this regularly then your lower back may feel a lot better!
The Causes of Low Back Pain and Possible Treatments — Nutrition Realm
The best exercises for spinal stenosis of the lower back focus on improving range of motion, strength, stability and endurance. Try these 9 exercises to help relieve your lumbar back pain caused by spinal stenosis.
The number one cause of lower-back pain is a tight hip flexor (or psoas). It happens to everyone and is usually caused by sitting down; another cause is sleeping on your side in a fetal position. (Lower Back Pain Sleep)