Tight hip flexor musculature causes excessive anterior tilt of the pelvis… hyperlordosis of the lumbar spine… hyperkyphosis of the thoracic spine… hypolordosis of the lower neck with hyperextension of the head at the atlanto-occipital joint… forward head carriage… tight posterior neck muscles… headache.
Text Neck and Neck Pain… and Neck Dysfunction
With any imbalanced posture (postural distortion pattern), including text neck posture, asymmetrical pathomechanical forces are placed into the tissues of the body. These forces have to have an effect. I believe it is impossible to argue that pathomechanics do not lead to dysfunction.