Abstract Summary
The purpose of this investigation was to explore changes in passive lumbar spine properties in response to simulated low velocity rear impacts and assess this relation with low back pain (LBP) symptom reporting post impact. Participants were exposed to two collision simulations: in an automobile seat with lumbar support and without. For each collision simulation, measures of lumbar spine flexion-extension passive stiffness were obtained prior to impact, immediately post impact and 24 hours post impact to quantify time-varying changes in passive stiffness. Results from this investigation demonstrate time-varying changes in flexion-extension passive stiffness, particularly in the low stiffness portion of the curve. However, these changes were not associated with participants reporting clinically significant levels of LBP.
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