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Investigating the Effects of Symmetrical-Distributed External Loads on the Static Postural Control in Low Back Pain Subjects: A Comparison with Normal Subjects

Mokhtarinia HR, Sanjari MA and Parnianpour M

The present study was aimed to analyze the control of posture in the subjects with CLBP in comparison with matched healthy adults in tow test conditions of with (12 kg) and without symmetrical external load. Twenty three healthy and 21 low back pain subjects participated. Postural sway was measured while participants stood on a force plate. We used two way ANOVA to explore the pre/post applying external load and the between groups difference. Applying external load had a significant main effect on center of pressure parameters. There was no interaction of load and group in this study. Also there was no difference between two groups at the beginning of the test. These data show that wearing 12 kg of external weight in a waistcoat increases the postural sway of subjects, which may in turn increase the likelihood of falls and injury.