Ladies and gentlemen, as this politically incorrect illustration demonstrates, your posture is making you look short and fat
And no one wants that. Certainly not me.
Okay, I still kinda look like Shrek, but did you see those new buns O’ steel I got???
Two of the most common postural flaws I see are:
Postural Flaw #1 - Anterior Pelvic Tilt
Which leads to Lordosis
Unfortunately, Anterior Pelvic tilt & Lordosis manifest themselves as a protruding Gut and Butt. And no one likes that.
Postural Flaw #2 - Kyphosis
Kyphosis and a ‘forward head’ position makes you look hunched over and appear shorter. And once again, no one wants that.
When you are unwise enough to put kyphosis together with lordosis, you end up with…
This is what you should look like.
Here is a postural analysis video that should provide additional detail.
The short answer is that you need to stretch some muscles:
and strengthen other muscles: