1. Unstable sitting most closely matched real-world lumbar posture.
2. Mean lumbar flexion was 27°–28° during unstable sitting.
3. Upright sitting was less representative of daily posture.
4. More daily sitting led to greater seat motion without visual cues.
5. Frequent walking improved lumbar–seat coordination in balance tasks.
6. Study funded by Australia’s NHMRC; no conflicts of interest reported.

Source: Journal of Clinical Medicine