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!
While over stretching may not necessarily be good for your lower back, in this guide I explain how to wisely stretch the muscles that need to be stretched and the exercises that are the most beneficial to you. These exercises target the muscles that tend