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A comprehensive study on the biomechanical behavior of lumbar vertebrae under compressive and shear loads specific to high-impact activities.
Identifying critical stress points and microstructural degradation mechanisms in the L4-L5 intervertebral disc, where material fatigue rates were unknown under rapid load-unload cycle conditions.
We implemented a hybrid methodology, combining FEM (Finite Element) modeling with surface EMG data to correlate internal stresses with paravertebral muscle activation.
The model accurately predicted a concentration of stress in the posterior region of the annulus fibrosus, confirmed by imaging. We established a safety threshold for repeated compressive forces and developed an algorithm for predicting disc herniation risk based on individual kinematic parameters.
Segmental stiffness decreases by 18% after 10,000 cycles of moderate loading. The study provided critical structural safety coefficients for designing rehabilitation programs and protective equipment.