To increase full cervical spine extension, in a loaded position, which is an advancement to the unloaded position. This is good for people who have disc bulges and pain when tilting the head back in sitting, and those who suffer from poor posture and a dysfunction in the lower cervical spine. This exercise encourages extension (backwards bend) through the lower part of your neck which is often stiff and usually held in a flexed (forward bent) position. It also encourages flexion through the upper part of your neck which is usually in extension when we sit with our chins poking out.