The effect of changes of lumbar posture on postural balance in choronic LBP patients while applying axial load

Aim of current study was to investigate the effect of changes of lumbar posture on postural balance in non specific choronic low back pain patients while applying axial load. In this experimental analytic study، 10 Non Specific Choronic Lo Back Pain NSCLBPwomen patients and 10 healthy volunteers that were matched together، evaluated. Postural sway of participants in neutral، lordotic and kyphotic posture of lumbar with and without axial load and with closed and opened eyes evaluated. Antro-posterior range، Antro-Posterior standard deviationMedio-Latral rangeand Medio-Latral standard deviation was evaluated in this study. Also for studying the patient’s avoidance belief and disability و three standard tools Fear-Avoidance Belief Questionnaire (FABQ)، Tampa Scale of Kinesiophobia (TSK) and Roland-Morris Questionnaire were used. Tha data were analyzed with Mix model ANOVA. Mix model ANOVA revealed in neutral posture AP rang (P=0. 045) and APsd (P= 0. 029) in LBP group، were significantly higher than healthy group. In LBP group AP range (p=0. 015) and APsd (p=0. 008) in kyphotic posture، were significantly lower than neutral posture and APsd (P=0. 046) in lordotic posture was higher than kyphotic posture. In LBP person’s fear of movement and pain also locating in end of range of lumbar posture. In kyphotic and lordotic posture were limitations for CNS and joints which control postural sway so persons with LBP limited their postural sway in these postures.