Assessment request: https://www.reddit.com/r/posturepals/comments/1auhsgy/could_i_get_a_posture_assessment/
So what we see here is pretty common set of postural issues.
Green line is the our plumb line - a line / plane of reference to which we relate the position of different body parts. to be able to judge what is going on.
The line is always placed into the purple marker, the front of your ankle, which is your talus bone. That's where all the weight of the body gets distributed in one point to the foot arch.
The knee marker (just above your patela, on the image wrongly placed about an inch too high - my apologies) is also too far forward from the green line.
That means, your ankle and your knee joint's aren't in full extension.
Next up is your pelvis. There are two markers at your pelvis - blue is your iliac (anterior superior iliac spine), green is the top of your sacrum. Both points are on the same object - pelvis.
Again, we can state that the iliac is too far forward (and down) in relation to the plumbline. And so your sacrum is then too high and too forward as well. In other words, you have APT, you are rotating your pelvis in the direction of the blue arrow.
Will skip the red curve for now and look at the ribcage.
There is also a rotation in the ribcage - this time the opposite rotation to the pelvis. The top of the ribcage is pulled backwards, the bottom of the ribcage is pushed forwards. The yellow line is your sternum, with it's top and bottom marked with another two blue markers. The sternum is the front of your ribcage, the top of the red line at your back is the back of your ribcage. You can clearly see the ribcage inbetween the two and being rotated.
Ok, so now we got two massive objects in the body - the pelvis (lower torso) and the ribcage (upper torso). The middle torso, which is your spine (red curve) and the abdominal cavity is then taking shape based on the forces applied from below (pelvis) and above (ribcage). The spine is highly articulated part of the body (lots of joints allowing for lots of movement) and it will always take shape based on the forces acting on it from above and below.
This red curve (arch) is the biggest problem you got. It's what we call "shortening and narrowing of your torso" - you are constricting breathing, circulation, digestion and you are loading your joints in a way they aren't supposed to be loaded. Your thoracolumbar fascia is shortened and so is your ITB.
This shape you see is a result of commands of movements of the different parts of your body you are currently giving unconsciously. You are doing it out of habit, not even knowing you are doing it.
To get properly functioning mechanism, you would need to learn to adjust these movements. Long story short, you would need to adjust the position of the body parts so ALL of the blue spots end up on the green line, the green spot ends up well and trully past the line (to the back) and the red curve goes completely flat in your lowerback.
Such organisation of your mechanism would be better.
There are other things going on that aren't quite correct - position of feet, arms being retracted too far back in relation to your torso, head also retracted too far.
Besides, you can see the left / right imbalances on the front / back images. This is just a bit of postural scoliosis that will mostly resolve itself when you start expanding the torso (instead of contracting it).
If you have more questions, just reach out.