RESUMEN
Reports of pattern motion between lumbar spine and hip vary for stoop, loading conditions or the pathology present, such as chronic back pain. Therefore, the purpose of this study was to compare the relative contribution of the hip joint and lumbar spine during stoop lifting in subjects with and without a history of low back pain. This clinical trial was performed in Tehran. Fifty subjects were assigned as either a low back pain group or a control group. A Three-Dimensional Optoelectric Motion Analysis System was used to measure the amount of lumbar spine and hip motion during stoop lifting. Each subject performed stoop lifting with and without weight. The data were analyzed using independent t-test and repeated measurement test. These results showed that there were significant differences between patients with low back pain and healthy subjects in the pattern of motion [P<0.05]. Individuals with a history of low back pain tended to move According to the findings, history of backache can affect the change of pattern motion for hip joint and lumbar spine. This change may be a reason for the recurrent incidence of backache