Take our simple psoas self test to discover if a tight psoas muscles may be contributing to your back, shoulder or neck pain.Then do this Supine Psoas Release practice to release long held tension.Props: Firm folded blanketTake our simple psoas self test to discover if a tight psoas muscles may be contributing to your back, shoulder or neck pain.Then do this Supine Psoas Release practice to release long held tension.Props: Firm folded blanket