title: The effect of within-session instruction on lumbopelvic motion during a lower limb movement in people with and people without low back pain.
abstract: The purpose of the current study was to examine how effectively people with and people without low back pain (LBP) modify lumbopelvic motion during a limb movement test. Nineteen subjects with LBP and 20 subjects without LBP participated. Kinematic data were collected while subjects performed active hip lateral rotation (HLR) in prone. Subjects completed trials (1) using their natural method (Natural condition) of performing HLR, and (2) following standardized instructions to modify lumbopelvic motion while performing HLR (Modified condition). Variables of interest included (1) the amount of HLR completed prior to the start of lumbopelvic motion, and (2) the maximum amount of lumbopelvic motion demonstrated during HLR. Compared to the Natural Condition, all subjects improved their performance during the Modified condition by (1) completing a greater amount of HLR prior to the start of lumbopelvic motion, and (2) demonstrating less lumbopelvic motion (P < 0.01 for all comparisons). There was a tendency for people without LBP to demonstrate a greater difference in maximal lumbopelvic rotation between the Natural and Modified conditions (P = 0.07). In conclusion, people are able to modify lumbopelvic motion following instruction. Further study is needed to determine if people without LBP improve lumbopelvic motion following instruction to a greater extent than people with LBP.
authors.affiliation: School of Physical Therapy and Rehabilitation Science, The University of Montana, 135 Skaggs Building, Missoula, MT 59812, USA. sara.scholtes@umontana.edu
authors.forename: Sara A
authors.initials: SA
authors.lastname: Scholtes
authors.forename: Barbara J
authors.initials: BJ
authors.lastname: Norton
authors.forename: Catherine E
authors.initials: CE
authors.lastname: Lang
authors.forename: Linda R
authors.initials: LR
authors.lastname: Van Dillen
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001696:Biomechanical Phenomena; D016022:Case-Control Studies; D004185:Disability Evaluation; D005260:Female; D006621:Hip Joint / Q000503:physiopathology*; D006801:Humans; D017116:Low Back Pain / Q000503:physiopathology* / Q000534:rehabilitation*; D008161:Lumbosacral Region / Q000503:physiopathology*; D008297:Male; D009068:Movement / Q000502:physiology*; D010147:Pain Measurement; D026741:Physical Therapy Modalities; D012399:Rotation; D011795:Surveys and Questionnaires; D016896:Treatment Outcome