Protrude To Extend
Full-Length Neck Extension is pictured below; but only Protrusion takes Extension to the End-Range of Neck Extension
Full-length neck extension is done on the Pendulum neck machine by initiating the action with the selector pin in the first hole of the Pendulum Cam. In this position the cervical vertebra segments are lined and extended.
In full-length extension the upper cervical vertebrae segments are positioned in the extension portion of their total range. This is exactly what you want if you are training the neck muscles that move the cervical spine, but neck muscles also extend the head. A greater range of extension motion is achieved if you protrude the head forward.
Protrusion is the position where the head is maximally translated horizontally with zero side to side movement. This position has been shown to produce the maximal Occiput-C1 and C1-C2 extension movement.
To maximize your training you must include this exercise as part of your head and neck strengthening program. Even though in full neck extension the cervical vertebrae are positioned in the extension portion of their total range, only protrusion takes the cervical vertebrae Occiput-C1 and C1-C2 to their end-range of extension.
To optimally train the protrusion movement, place the selector pin in the 4 or 5 Way Pendulum Neck Machine in the 3rd hole from the front of the cam.
Do not exclude protrude if you want to Get Strong.