There is an old saying that no posture is bad unless you get stuck in it. The problem is that the thoracic spine often does get stuck in bad posture.
Bones of the Lumbar Spine and Pelvis
The low back is defined by the lumbar spine, composed of 5 vertebrae, named L1-L5. The pelvis is defined by the bones of the pelvic girdle.
Locked Short Muscles – Locked Long Muscles
Two opposing muscle groups, the “facilitated” muscles that are locked short and the “inhibited” muscles that are locked long.
