"Sit up straight," she was told for forty years. She can hold it for ninety seconds.
You correct yourself. Shoulders back, spine tall. Within minutes, the old shape returns, patient as gravity.
You conclude you lack discipline. You don't.
Here is what practice has taught me: posture is not a position you hold. It is a habit the nervous system runs — thousands of times a day, beneath attention. Willpower can interrupt a habit. It cannot replace one.
Standing straight by force is like holding your breath. Impressive briefly. Unsustainable by design.
Sometimes the slump is weak support muscles. Sometimes it's a body shaped by screens. Sometimes it's protection — a chest that learned closing feels safer. The nervous system defends each version loyally.
What if your posture isn't lazy, but loyal — to something old?
Don't correct your posture. Instead, three times today, simply notice it without changing anything. Awareness rewrites habits more honestly than force.
Progressive stiffness, one-sided changes, or posture shifts with pain or balance trouble deserve clinical eyes.