Abstract
In order to completely understand and model the dynamic lumbar spine one must understand not only the forces acting about the spine but also the motions of the lumbar region as well. This study was an investigation in to the effects of certain lifting parameters on the motions of the lumbar spine. The effects of asymmetry, load velocity, start position and load weight on the range of motion, angular velocity and angular acceleration of the lumbar spine were investigated in three planes: coronal, sagittal and transverse. The results indicate trade offs between the coronal and sagittal planes as a result of changes in asymmetry and changes in the lifting style as a result of increasing lift velocity. The results also indicate that the location in time of the peak accelerations are varied as a result of different lifting conditions.
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