simple way to test your own posture is to stand with your
back against a wall and your heels about 6 inches away.
With the back of your head touching the wall, and your
eyes level, the curves in your low back and neck should
leave enough space to slip your hand through. If your
curves are too great or too little, your spinal alignment
may not be ideal. If your head won't touch the wall, or
you have to tilt your head back to reach the wall you
may have an "Anterior Head Carriage".