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A-41 Free Communication/Poster - Biomechanics of Resistance Training Wednesday, May 29, 2019, 7: 30 AM - 12: 30 PM Room: CC-Hall WA2

FEM Analysis of Lumbosacral Joints on the Lift Barbell Preparation Phrase

234 Board #72 May 29 11:00 AM - 12:30 PM

Song, Yawei; Rong, Ke; Zhang, Xiyuan

Author Information
Medicine & Science in Sports & Exercise: June 2019 - Volume 51 - Issue 6S - p 51
doi: 10.1249/01.mss.0000560645.61992.ae
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PURPOSE: The aim of this study was to analyze the stress characteristics of the lumbosacral segments of the preparation phase of barbell lifting using finite element method and to provide scientific and objective mechanical factors of lumbosacral joint injury in weightlifters for prevention and treatment of lumbar weightlifting injuries.

METHODS: The three-dimensional lumbosacral finite element model was established by reverse engineering method based on DICOM data (L5-S5 segments included).The Von Mise stress trends of lumbosacral bone, soft tissue such as intervertebral disc, ligament were analyzed between normal physiological activities during flexion, extension, left bend, right bend and preparation phase of barbell lifting.

RESULTS: The von mise stress (mpa) of lifting weight condition respectively are 81.223,199.099,321.646,99.058,152.357,156.882,461.294,699.506,0,0,104.414,8.66,74.99,89.15 on posterior longitudinal ligament,left transverse process ligament,right lateral intercostal ligament,yellow ligament,interspinous ligament,spine on the ligament,left joint capsule ligament,right capsular ligament,left joint capsule contact stress,right joint capsule contact stress,end plate,nucleus,lumbar,sacrum.

CONCLUSIONS: The vertebral body is the main stress-bearing part during lifting and the intervertebral disc plays a major role in transmitting the load. Long-term repeated high-stress stimulation could cause slight fractures of cancellous bone and end-plate of vertebrae. Interspinous ligament bears more loads and is more likely to get injured compared to other ligaments. The imbalance of the left and right ligament force also reveals that minimizing spinal flexion and torsion compound action could reduce the possibility of ligament injury.

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