The authors concluded that massage appears to be the most effective method that was studied for reducing DOMS and perceived fatigue.
Psoas Major Function: Stabilization of the Spine by the Psoas Major
A healthy joint is both mobile and stable. However, some sources are concerned about the psoas major’s compression/stabilization effect upon the spine.
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.