Abstract:

BACKGROUND: Studies have explore the biomechanical properties of the lumbar spine, but because of the complexity of spinal anatomy and limitations of research methods, the prevention of waist injuries in lifters requires investigation.
OBJECTIVE: To establish the finite element model of complete human lumbar spine to analyze the lumbar motion segment loading characteristics when lifters are ready to lift barbell.
METHODS: The three-dimensional, comprehensive and realistic finite element model of the lumbar spine (L1-5) was established using datum of Dicom based on opinion of “assembled construction”, and the biomechanics of a lumbar motion segment during preparing lifting barbell was simulated.
RESULTS AND CONCLUSION: During preparation of lifting barbell the equivalent stress on the anterior-lower location of vertebral body was greater than the other sites, and stress on pedicle of vertebral arch was higher. The equivalent stress of intervertebral disc was observed at middle-anterior location of exterior annulus fibrosus, especial anterior location in flexion. The equivalent stress on the vertebral body and intervertebral disc showed gradually ascending trend from up to low sites. The stress on the vertebral body was 4-5 times higher than the below intervertebral disc’s. The three-dimensional finite element model could be used for studying the biomechanics of the lumbar spine.