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, look down towards your chest.
Return to the centre, ensuring you continue with your chin tuck.
Look up towards the ceiling.
Do not allow your shoulders to hunch up.
Continue with this movement at a steady pace.