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. Then rotate from side to side while keeping your chin tucked.
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 chin tucked throughout this movement.