It's true that good posture is a reflection of the way we look and feel about ourselves, but it's much more than that. Good posture is one of the simplest things each of us can do to help our backs stay healthy and pain-free. Good posture can prevent muscle pain, stiffness, and tension as well as back aches, pain, and injury.
Good posture is actually quite simple.
Standing Contrary to what most of us were taught, good posture does not mean standing with shoulders thrust back, chin forward, and spine straight as an arrow. Keep your buttocks resting against the chair back, and if your feet don't reach the floor, rest them on a footstool or box. Sleeping with more than one pillow under your head can exaggerate your neck curve and can place undue stress on your back. Choose a firm mattress for adequate back support. By using good posture throughout your day, you can help keep your back balanced and reduce your risk of back problems and injury.