Fear of movement is not associated with trunk movement variability during gait in patients with low back pain |
| |
| Affiliation: | 1. C.J. Gorter Center for High Field MRI, Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands;2. Department of Biomechanical Engineering, Delft University of Technology, Delft, the Netherlands;3. Orthopedic Biomechanical Laboratory of the Department of Othopedic Surgery, Shanghai Jiaotong University Affliated Sixth People''s Hospital, Shanghai, P.R. China. |
| |
| Abstract: | BACKGROUNDLiterature describing differences in motor control between low back pain (LBP) patients and healthy controls is very inconsistent, which may be an indication for the existence of subgroups. Pain-related psychological factors might play a role causing these differences.PURPOSETo examine the relation between fear of movement and variability of kinematics and muscle activation during gait in LBP patients.STUDY DESIGNCross-sectional experimental design.PATIENT SAMPLEThirty-one Chinese LBP patients.OUTCOME MEASURESSelf-report measures: Visual Analog Score for pain; TAMPA-score; Physiologic measures: electromyography, range of motion.FUNCTIONAL MEASURESLBP history; the physical load of profession, physical activity.METHODSPatients were divided in high and low fear of movement groups. Participants walked on a treadmill at four speeds: very slow, slow, preferred and fast. Kinematics of the thorax and the pelvis were recorded, together with the electromyography of five bilateral trunk muscle pairs. Kinematic and electromyography data were analysed in terms of stride-to-stride pattern variability. Factor analysis was applied to assess interdependence of 11 variability measures. To test for differences between groups, a mixed-design multivariate analysis of variance was conducted.RESULTSKinematic variability and variability of muscle activation consistently loaded on different factors and thus represented different underlying variables. No significant Group effects on variability of kinematics and muscle activation were found (Hotelling's Trace F=0.237; 0.396, p=.959; .846, respectively). Speed significantly decreased kinematic variability and increased variability in muscle activation (Hotelling's Trace F=8.363; 4.595, p<.0001; <.0001, respectively). No significant interactions between Group and Speed were found (Hotelling's Trace F=0.204; 0.100, p=.762; .963, respectively).CONCLUSIONSThe results of this study do not support the hypothesis that variability in trunk kinematics and trunk muscle activation during gait in LBP patients are associated with fear of movement. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
