P.T.s are trained for joint and muscular rehabilitation. They employ stretching and strengthening but cannot do adjustments. D.O.s are like M.D.s but can do some manipulations. These manipulations are primarily done for joint mobilization and reducing pain, not for corrective posture and spinal adjustment. Although D.O.s are aware of the great benefit of spinal manipulations for overall health and wellness and have done a significant body of research on it. Less than 1% of D.O.s do manipulations at all. D.C.s correct spinal alignment to reduce nerve interference and improve function and health.