Proper Sitting Posture Guide - Healthy Chair Positioning for Back Support #218250 (License: Personal Use)

The illustration shows a person seated on a simple wooden chair, maintaining neutral spine alignment with hips and knees at 90-degree angles. His feet rest flat on the floor, arms are supported by armrests (or resting naturally), and his gaze is forward without neck strain. This posture minimizes lumbar disc pressure and supports long-term musculoskeletal health.

Used in ergonomic guides, physical therapy resources, workplace wellness pages, and health blogs to teach correct sitting habits; matches user intent for preventing back pain or improving desk setup.