Are there Natural Curves in the Spine? Or Are you Bending? - A New Model of Ideal Posture - 02

Quick Overview

The video argues against the conventional view that the natural state of the spine involves exaggerated lumbar curves and a flattened thoracic curve when standing, proposing instead that the ideal posture, as suggested by F. Matthias Alexander's work, maintains a balanced curvature where the rib cage and pelvis rotate in opposite directions during activities like squatting, allowing for expansion of the back of the rib cage rather than just the front.

Key Points: The conventional view of standing posture, often aligned with a plumb line, results in the lower end of the rib cage being compressed and the lumbar curve being exaggerated when bending. F. Matthias Alexander and his students' technique suggests that the ideal posture involves the rib cage and pelvis rotating in opposite directions during torso movements, allowing for expansion of the back of the rib cage. When subjects attempt to mimic the 'plumb line' posture during breathing, they struggle to expand the back of their rib cage, instead expanding only the front. When subjects apply the Alexander technique principles (harmonic expansion), they can expand the back of the rib cage while breathing, supporting the idea that this is the optimal configuration. Exaggerated lumbar curve in the common standing posture is shown to be detrimental, potentially causing the lower ribs to thrust forward, which shortens the spine. The ideal posture, according to this model, requires maintaining the natural curves of the spine (cervical, thoracic, lumbar, sacral) in balance, rather than flattening the thoracic curve. Experimental results showed that subjects attempting to maintain the plumb line posture could not easily expand their backs when breathing, but could do so when applying the Alexander-derived directions.

Context: This video analyzes and challenges the commonly accepted model of ideal human posture, often visualized using a plumb line reference against the spine. It contrasts this 'plumb line shape' with the principles derived from the work of F. Matthias Alexander, an Australian actor who developed the Alexander Technique in the late 19th and early 20th centuries to improve vocal performance and posture. The video uses diagrams of the vertebral column, comparisons between common postures, and demonstrations to illustrate how breathing mechanics and spinal alignment are affected by these different postural concepts.