postural strain – MySymptom

Why does my upper back ache deeply when I sit without back support?

1. Introduction Deep upper back aching when sitting without support is the result of sustained isometric contraction of the postural muscles attempting to counteract gravity. Without external lumbar and thoracic support, the spine naturally collapses into a kyphotic curve, forcing the rhomboids and trapezius muscles to work relentlessly to keep the torso upright. This sustained … Read more

Can poor posture cause a sharp pain under the left shoulder blade?

1. Introduction Chronic poor posture frequently causes a sharp, localized pain under the left shoulder blade. Slouching, hunching over a desk, or maintaining a forward head carriage places excessive, continuous mechanical strain on the periscapular muscles and the cervical spine. This relentless biomechanical overload forces specific muscle groups to act as structural tension wires, rapidly … Read more