Sitting creates shortening of the hip flexor or psoas muscle. When your psoas muscle is short or contracted and you stand up, it pulls on the lower back vertebrae that it is attached to. Psoas tightness is a huge cause of the lower back pain that people sitting all day experience. ⁠

This simple lunge stretch is a great way of stretching and rehabilitating tight psoas muscles. You can stand for this exercise or kneel. Hold this gentle stretch for 30 seconds or more and then switch legs. ⁠