title: Lasting changes in passive range motion after spinal manipulation: a randomized, blind, controlled trial.
abstract: OBJECTIVE
  To study whether a 3-wk series of spinal manipulation has any lasting effect on passive cervical range of motion.
  
  
  METHODS
  Randomized, controlled trial with a blind observer.
  
  
  METHODS
  Ambulatory outpatient facility in an independent National Health Service funded chiropractic research institution.
  
  
  METHODS
  Thirty-nine headache sufferers who, on entering the study, displayed objectively decreased passive cervical range of motion. These subjects were recruited from 400 headache sufferers who responded to newspaper advertisements.
  
  
  METHODS
  Half of the group received high-velocity, low-amplitude cervical manipulation twice a week for 3 wk. The other half received low-level laser in the upper cervical region and deep friction massage in the lower cervical/upper thoracic region, also twice a week for 3 wk.
  
  
  METHODS
  Goniometrically assessed passive range of motion of the cervical spine.
  
  
  RESULTS
  Although passive cervical range of motion increased in both groups during the trial period, there were no statistically significant differences between the two groups 1 wk after the last treatment.
  
  
  CONCLUSIONS
  It seems that any changes in passive range of motion after spinal manipulation are of a temporary nature.
authors.affiliation: Nordic Institute of Chiropractic and Clinical Biomechanics, Odense, Denmark.
authors.forename: N
authors.initials: N
authors.lastname: Nilsson
authors.forename: H W
authors.initials: HW
authors.lastname: Christensen
authors.forename: J
authors.initials: J
authors.lastname: Hartvigsen
mesh_terms: D000328:Adult; D002574:Cervical Vertebrae / Q000502:physiology*; D002684:Chiropractic / Q000379:methods*; D005260:Female; D006261:Headache / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016059:Range of Motion, Articular; D013131:Spine