The spine is an incredible structure, with both great stability but also tremendous mobility in all three cardinal planes.
Back Extension McKenzie Exercises Effect on Disc Fluid
The authors concluded that little evidence was found supporting the hypothesis that extension McKenzie exercises affect disc fluid content.
Motions of the Joints of the Lumbar Spine
Motions of the lumbar spine: The lumbar spine can move axially and nonaxially in all three cardinal planes (sagittal, frontal, and transverse).
Motions of the Cervical Spine
Table 1 shows average healthy ranges of axial motion of the cervical spine (head and neck), from the atlanto-occipital joint through the C7-T1 joint.
