Kite Man
Here is a different sort of image to play with… and contemplate. See if you can imagine that you are the figure on the far right of the illustration below. It is nothing other than a slightly complex kite with a few more joints and strings. If you can catch the thought/image for a moment it should give you a sense of an enhanced structure (better posture) without having to do anything (other than entertain a thought). In the image you are to think of yourself as nothing more than this kite man… with the strings (tension elements) running along both your outer edges (the dorsal-ventral seam) and on the belly (ventral) side of your body with a few sticks, like shown, to keep the strings under tension. As shown, imagine the head section and the tail section as both long and horizontal. Similar strings under a little tension along the dorsal-ventral seam of the limbs (not shown here) will add even more structure as well as lightness to your momentary habit-breaking experience.