Thoracic mobility is the range of motion available in the mid-back (T1 to T12), specifically its ability to extend, rotate, and flex without the neck or lower back taking over the movement.
Sciatica from sitting is irritation or compression of the sciatic nerve caused by prolonged seated pressure, tight hip muscles, and reduced movement, producing pain that radiates from the lower back or buttock down one leg.
The best desk setup for pain between the shoulder blades keeps your monitor at eye level, your elbows supported near 90 degrees, and your screen close enough that you never lean forward, so the muscles between your shoulder blades stop holding you up all day.
Pain between the shoulder blades is discomfort in the upper-mid (thoracic) back between your scapulae, most often caused by muscle strain, rounded posture, or prolonged sitting rather than a serious medical problem.
Neutral sitting posture is a seated position where the spine keeps its natural curves, the pelvis stays balanced, and load spreads evenly across the lower back rather than concentrating in one area.
