Midline Stabilization: The Hip Extension

Brian Chontosh of CrossFit’s Level 1 Seminar staff explains how to develop posterior strength in the GHD hip extension by maintaining a neutral spi... Midline Stabilization: The Hip Extension. Brian Chontosh of CrossFit’s Level 1 Seminar staff explains how to develop posterior strength in the GHD hip extension by maintaining a neutral spine. In the hip extension, he says, “the musculature along the backside of the body, and the abs and the spinal erectors act isometrically to create an unchanging trunk.“