Work–related low back disorders arise from a complex interaction of events. One aspectof interest is cyclic or repetitive tasks, which are performed on a daily basis in a variety ofsituations, and often for extended periods of time. The specific questions to be addressedin this study are the effects of the load frequency and time-dependent material propertieson the lumbar spine component behavior. The newly developed and validated, subjectspecific, finite element model of lumbar spine is used in conjunction with kinematic dataimported from human subjects experimental testing of repetitive sagittally-symmetriclifting and lowering tasks. Creep and energy dissipation in the lumbar spine componentsare used to quantify the effect of lifting frequency and velocity on the potential for injuryover an eight-hour workday.
展开▼
