THE EXERCISES
Exercise 1:
Begin by sitting on an office chair or dining chair (not your favourite armchair). Imagine a string attached to the crown of your head and going up to the ceiling. (The crown is not the top of your head – it is farther back.)
A friendly puppeteer is about to pull on the string, to draw you gently upwards, crown first. As the puppeteer pulls, your neck begins to lengthen.
This will make you aware of the muscles at the back of your neck. Think of these muscles relaxing. As the neck muscles release and lengthen, the back of your neck can’t help but move towards the back of your collar. As your crown is drawn upwards, your chin drops and your forehead rolls slightly forward and up.
By imagining a puppeteer doing the work, you are not stiffening or forcing your neck into a new position but allowing it to happen naturally. The less you tighten the back of your neck, the longer it becomes; muscles contract as you tighten them and lengthen when they relax.
As your neck muscles relax and lengthen, your head, neck and back realign
themselves and you regain your natural poise.
Taken from : The Busy Body - Stress Free Posture