I've had back and neck problems my entire life and until a week ago, I always had just attributed it to the fact that I was constantly stressed out. My girlfriend has told me that I look like a raptor which I just laughed about but then I started to notice it in photos. Trying to help me alleviate the pain, she found some information related to "Upper Cross syndrome" on the internet that suggested a few things, one of which was to "keep your head up so your neck muscles aren't constantly trying to hold it up as it leans forward." It made sense so I started being conscious of where I kept my head.
At first it was difficult but slowly got easier and then one day it clicked - Keeping my head up is uncomfortable to me mentally. I have this posture because it's a reflection of how I feel on the inside. I am slightly above average in height and until recently I didn't have a shred of confidence. I didn't want to look the world in the eye because I was nothing so I hung my head forward. Now that I feel like I can visualize the mental me, I totally see a connection. As I've been "holding my head up", I've felt less stress and way less affected by stuff around me. Today I was put in a job I'm not fond of and someone was a dick to me (wether they meant to be or not) in front of a bunch of people but it didn't really bother me like it would have in the past. Every time I was tempted to get stressed out I could feel my body start to mirror the emotions and so I fought it by visualizing how I should look and then following suit physically.
I know this probably sounds like a bunch of new age hippie horse shit, but I really believe that our bodies are a direct reflection of our minds. That isn't to say you aren't born with a certain set of genetic handicaps but the most beautiful people are the ones who radiate it from the inside. They are attractive because they possess a confidence that can only be had when you accept yourself. Posturing is usually used as a pejorative, however, I think it has a positive side. Science has shown that if you change your posture and do what they call "power poses", it not only affects how other people perceive you, but also how you see yourself.
What does your mental person look like? Can you even picture that? Most of us don't want to really see ourselves because we don't like what we'd see. The thing is that what you see is transformable. Starting might be as simple as picking your head up or just dropping the baggage you've been holding on to in your head.