Why Sitting Can Make It Worse
Long sitting keeps the hips bent for hours. Over time, this may contribute to tight hip flexors and weak glute or core muscles. When you stand up, the body may struggle to fully open the hips, and the lower back may compensate.
That is why many people feel stiff when they rise from a chair, after driving, or after working at a desk. Gentle movement often helps more than complete rest. The NHS advises staying active and continuing normal activities as much as possible for most back pain, while avoiding movements that make pain worse.
Signs the Psoas May Be Involved
The psoas may be contributing if you notice: