Correct monitor height is the screen position where the top edge sits at or just below your eye level, so your gaze lands on the upper-middle of the screen without tilting your head up or down.
A posture corrector is a physical brace that manually pulls your shoulders into position, while an AI posture app is software that scans your posture through your phone camera and builds a personalized routine to correct it.
A posture headache, often called a cervicogenic headache, is head pain caused by muscle tension and joint strain in the neck, most often from forward head posture and rounded shoulders.
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.
