title: Comparison of Lumbopelvic and Hip Movement Patterns During Passive Hip External Rotation in Two Groups of Low Back Pain Patients with and without Rotational Demand Activities.
abstract: BACKGROUND
  Because different groups of people with low back pain (LBP) engage in different tasks, their lumbopelvic-hip complex may move in different ways in those groups. The purpose of this study was to quantify the differences in lumbopelvic movement pattern during the passive hip external rotation (PHER) test in LBP patients with and without rotational demand activities (RDA).
  
  
  METHODS
  A total of 30 subjects with LBP, including 15 patients with-RDA and 15 patients without-RDA were enrolled. A passive hip external rotation test was performed. Pelvic and hip rotation over the full range of the test, timing of hip and pelvic motion, and pelvic rotation in the first half of the movement were measured using a 3-D motion analysis system.
  
  
  RESULTS
  Passive pelvic rotation during the test in the group with RDA was significantly greater than in the other group. However, there was no significant difference between the groups in other kinematic variables, including hip external rotation, timing of hip and pelvic motion and pelvic rotation in the first half of the movement (p > 0.05).
  
  
  CONCLUSIONS
  1. A greater lumbopelvic rotation ROM during the PHER existed in LBP patients who regularly participated in RDA. 2. Different groups of patients with LBP who engage in different specific activities may have a specific lumbopelvic movement pattern impairment. Therefore, each group of LBP patients in regard to their specific activities may need a different, specific plan of treatment.
authors.affiliation: Physical Therapist, Exercise Physiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
authors.forename: Meissam
authors.initials: M
authors.lastname: Sadeghisani
authors.affiliation: Exercise Physiology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
authors.forename: Vahid
authors.initials: V
authors.lastname: Sobhani
authors.affiliation: Department of Mechanical Engineering, Lenjan Branch, Islamic Azad University, Isfahan, Iran.
authors.forename: Ehsan
authors.initials: E
authors.lastname: Kouchaki
authors.affiliation: Neurologist, Shahrekord University of Medical Sciences, Iran.
authors.forename: Asghar
authors.initials: A
authors.lastname: Bayati
authors.affiliation: Neurosurgeon, Ayatollah Kashani Hospital, Shahrekord University of Medical sciences, Iran.
authors.forename: Ali Asna
authors.initials: AA
authors.lastname: Ashari
authors.affiliation: Rheumatologist, Shahrekord University of Medical Sciences, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Mousavi
mesh_terms: D001696:Biomechanical Phenomena; D005260:Female; D006621:Hip Joint / Q000503:physiopathology*; D006801:Humans; D017116:Low Back Pain / Q000503:physiopathology*; D008161:Lumbosacral Region / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009068:Movement / Q000502:physiology*; D010388:Pelvis / Q000503:physiopathology*; D016059:Range of Motion, Articular; D012399:Rotation