After decades of practice as a physical therapist, Christine Koth saw a pattern emerge. Nearly everyone had a tight iliacus muscle and next to no one was aware of it. In her practice, this pattern of tightness soon became a predictable root cause of pain in the lower back, hip, tailbone, knee and foot. After countless successes releasing the iliacus and zero evidence that this muscle is being widely addressed by anyone else, it was time for a paradigm shift. Christine decided to put the iliacus muscle on the map in her best-selling book, Tight Hip, Twisted Core - The Key to Unresolved Pain.