Assess learners' ability to analyze biomechanical and ergonomic risk factors contributing to low back pain in adult office workers. Content covers relevant lumbar anatomy and loading, posture and task-related risks (prolonged sitting, flexion, rotation), workstation and chair design, basic assessment methods (observational tools, simple load estimations), and evidence-based interventions; quiz items will include case scenarios requiring interpretation of assessment findings and selection or justification of ergonomic solutions.