Watch almost any royal walkabout and you will see it within minutes. King Charles, moving slowly along a line of well-wishers or through a garden he is being shown, hands clasped behind his back. His father did it for seventy years. Plenty of grandfathers do it on a Sunday walk, and plenty of teachers do it in a school corridor. It looks like nothing at all. But to the people who study body language for a living, how you hold your hands when you walk is one of the most revealing things you do, and this particular posture says more than most.

What the gesture actually is

Body language specialists usually distinguish between two versions of the hands-behind-the-back walk, and the difference matters. In the first, one hand simply rests in the other, palms relaxed. In the second, one hand grips the opposite wrist or forearm, sometimes quite tightly. The authors Allan and Barbara Pease, whose Definitive Book of Body Language remains the standard reference on the subject, read the two very differently: the relaxed palm-in-palm version as a sign of confidence and assurance, the wrist-gripping version as a sign of someone holding themselves back. Keep that distinction in mind, because it shapes everything below. It is also worth saying plainly that this is the territory of body language interpretation, not laboratory science. No study proves what a gesture means for any one person; what experts offer are patterns.

The 5 traits it is most often associated with

1. Confidence. Holding your hands behind your back leaves the whole front of the body open: throat, chest, stomach, the parts we instinctively protect when we feel threatened. People who feel unsafe fold their arms or hold something in front of them. Walking with the torso fully exposed signals, without a word, that you do not feel the need to defend yourself.

2. A sense of authority. It is not an accident that this is the stance of the headteacher on playground duty, the officer inspecting a parade, the manager walking the factory floor. It is the posture of someone who is observing rather than being observed, and many experts read it as a quiet marker of status.

3. Self-control. In the wrist-gripping version, the hands are literally restraining each other. Body language specialists often interpret that as someone managing frustration, impatience or nerves, keeping their hands from fidgeting when they would rather be doing something else.

4. A reflective turn of mind. People very often fall into this posture when they are thinking: pacing a room, walking slowly with no destination. Taking the hands out of play seems to free up attention, which is why it so often goes with a slower, more deliberate step.

5. Discipline and training. For many people it is simply learned. It is a close cousin of the military “at ease” position, and anyone brought up in uniformed institutions, or around people who were, may find it their natural resting posture. Which brings us to the royals.

Why the royal men do it

Prince Philip was the most famous practitioner of all. The body language expert Judi James once observed that the late Duke of Edinburgh had, like the Queen, decided that less was more, adopting a signature look of hands clasped behind his back that never changed over the decades. A naval officer before he was a consort, he wore the posture like a uniform. King Charles, also trained in the Royal Navy, inherited it, and Prince William can often be seen doing the same.

There is a practical reason too, and James has put her finger on it. Royals, she has noted, cannot greet the world with crossed or folded arms, the everyday gestures most of us use to reassure ourselves; in her analysis of the King this year, she described how they fall back on smaller, truncated rituals instead. Hands behind the back solves the problem elegantly: it keeps the hands still and out of the way, looks composed rather than defensive, and projects exactly the calm authority a royal visit is meant to convey. It also happens to suit a man who is famously prone to fidgeting with his cufflinks when he is nervous, as other experts have pointed out. Behind the back, nobody sees the cufflinks.

Should you read it in the people around you?

With caution. Context changes everything: someone standing with their hands behind their back in a cold wind may just be keeping warm, and someone raised by a military parent may simply be copying what they saw every day. The relaxed version and the gripping version also tell opposite stories. The most useful way to use any of this is on yourself. If you notice you walk this way when you are calm and thinking, you are in good company. If you catch yourself gripping your own wrist in a meeting, it may be worth asking what you are holding back. Like the conversations we choose, the small things we do without thinking are often the most honest.

The takeaway

Walking with your hands behind your back is one of the most confident postures a person can adopt: open, unhurried, and in control. It is the stance of people who are thinking, of people who were trained, and, for three generations now, of the men of the royal family, for whom it solves the very royal problem of looking composed while being watched by everyone. Royal polish, it turns out, is often just stillness done well.