HOW: Begin by lying face up then perform a chin tuck on a mobility sac/peanut/2 lacrosse balls. Place the balls just underneath the base of your skull. The chin tuck is created by pushing the small of your neck in towards the balls. Think about creating a double chin to perform the tuck. Pushing your tongue on the roof of your mouth may make it easier for you to activate the neck muscles.
FEEL: The pressure of the balls should be in the sub-occipital area (base of skull).
COMPENSATION: Avoid arching or rounding your neck, keep your eyes facing the ceiling throughout this movement.