Psoas Wedge | Psoas Muscle Release Tool | Deep Tissue Relief | Tight Hips Hook & Hip Flexor Release

Lumia Wellness Psoas Wedge (2 pcs) | Psoas Muscle Release Tool | Deep Tissue Relief | Tight HIPS Hook & Hip Flexor Release

Aletha - Orbit Hip Flexor Release Ball | Psoas Massage Ball for Pain Relief and Trigger Point Muscle Therapy

Tight Hip, Twisted Core: The Key to Unresolved Pain - by Koth, Christine and Pimas, Masha (Paperback, Aug 13, 2019)