36 Pictures To See Which Muscle You’re Stretching. Learn Which Muscles You Are Stretching via greatist: Choose the best stretches for you and learn how to do them correctly to achieve your goals while avoiding injury.
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!