Better Posture 101
To create great alignment for your body, I recommend a three-part strategy. First, build awareness by assessing your posture and your lifestyle. Next, create a yoga prescription for your specific postural problem by incorporating a few simple poses into your regular practice. Finally, take your newly developed awareness of your alignment issues and apply it throughout your daily life.
Before tackling the how-tos, however, it's important to understand the anatomy of proper posture. Whether you're sitting or standing, your spine has natural curves that should be maintained. They are a mild forward curve (like a gentle backbend) in the neck and lower back, and a mild backward curve in the upper back and midback. As you practice yoga, you learn to maintain these optimal curves in many standing poses, in most sitting poses, and in inversions like Sirsasana (Headstand) and Adho Mukha Vrksasana (Handstand).
If any of these curves are habitually flattened or overly curved, abnormal posture can get locked into the body. A wide variety of abnormal curves can occur, including a flat neck and a flat lower back, but we'll focus on the two most common problems: a hunched upper back (known as excessive kyphosis), which is usually linked with a jutting forward of the head (known as forward head) and, at the other end of the spectrum, an extreme sway in the lower back (known as excessive lordosis). These extreme curves contribute to many of the painful problems—muscle strain, joint pain, and disk problems, to name a few—that physical therapists and other health care practitioners treat every day.
Maintaining just the right curves is only part of the equation, however; to function efficiently, your skeletal structure also needs to be aligned vertically. That means when you're standing, your ears should be over your shoulders, your shoulders over your hips, and your hips over your knees and ankles. When any body part falls out of that vertical line, the adjacent support muscles will feel the strain. For example, years of having a forward head will cause the muscles of the upper back and neck to become tired and achy from holding up the weight of the head against the pull of gravity.
So, while you needn't nag yourself about slouching, you may discover that the simple act of straightening up can change your life. If you train your body to maintain the normal spinal curves and keep your posture vertical and spacious when you're standing or sitting upright, you're likely to feel better all over. And that's something to write home about.