Sit or stand up straight.
Ensure your posture is upright with your weight equally spread.
From a neutral position with your head, pull your head backwards so that your chin tucks in.
Feel the back of your neck lengthen.
Keeping this position, turn your head to look over to one shoulder.
Turn back to the centre and turn to look at the other shoulder.
Ensure you continue with your chin tuck.
Do not allow your shoulders to hunch up or your body to rotate with the movement
Only go as far as you can manage comfortably.