The 20-second hugWhat touch can really do — and why it doesn't come down to a stopwatch

Years ago I sat in a lecture in Berlin about the power of the embrace. I have forgotten much of it — but not the moment the speaker asked when we had last really hugged someone. Not the fleeting tap with a pat on the shoulder. Really.

That no quick answer came to me occupied me longer than any number in that lecture. By now there is remarkably solid research on the question — and it is some of the more heartening research I have read for this blog.

What the research knows by now

In 2024, Nature Human Behaviour published the largest evaluation of the topic so far: a team including Bochum researchers pooled more than 130 studies with around 10,000 participants — from neonatal wards to care homes.

The result is unspectacular and strong precisely for that reason: touch improves wellbeing — reliably, across many studies, in adults and newborns alike. The clearest effects showed on the studies' measures of pain, low mood and anxiousness.

• Frequency beats duration. More occasions of touch brought more benefit — longer single touches not necessarily.
• Objects work too — weighted blankets, cuddly cushions, social robots. But for mental wellbeing, human-to-human touch was clearly superior.
• No technique required. Whether the touch was “professional” or simply familiar made little difference to the effect.

The hug on difficult days

My favourite study is an older one. In 2015, a team around Sheldon Cohen had 404 adults report every evening for two weeks: were there conflicts today? Were you hugged today? Afterwards, the researchers exposed participants to a common cold virus under quarantine conditions.

The finding the researchers report: those who felt socially supported and were hugged more often weathered the conflict days measurably better — in the analysis, hugs accounted for about one third of that buffering effect.

What interests me here is not the virology — I leave that to medicine. It is the social part: a hug on the evening of an argument changed something in the data. Not the clarifying conversation, not the perfect apology. The gesture.

And the famous 20-second rule?

The number comes from the lab. In stress experiments — such as a Bochum study from 2022 — couples embrace for about 20 seconds before one of them is sent into a stressful situation. That is a study protocol, not a law of nature: some duration has to be written into the procedure.

Honest reporting includes this: in that very study, the measurable stress hormone response dropped in the women — in the men, the effect did not appear. The popular version of the story likes to omit that half. Why, is open; the authors discuss the bonding hormone oxytocin as a possible mechanism — as a hypothesis, not a proof.

And how long does a hug actually feel good? That has been studied too: a London study compared hugs of one, five and ten seconds. The one-second hug failed — too short, too out of control. Five and ten seconds were both experienced as distinctly more coherent, with little difference between them. Arm placement, by the way, hardly mattered. What it did predict was something else: the emotional closeness of the two.

“A hug needs no stopwatch. It needs consent — and a moment in which neither of you is already halfway out the door.”— Wolfgang Blüml

When hugs have grown rare at your place

Perhaps you noticed while reading: it has become rare with us. Between partners, with the almost-grown children, with your own parents. That is more common than people think — and it is almost never because someone stopped wanting to.

Usually a pattern runs underneath: whoever has hugged into thin air once too often stops making the first move. Whoever has linked closeness to the risk of conflict prefers to keep a distance — “I'd rather say nothing than have it escalate again”. Patterns like these are often long understood. But understanding alone does not change them — I have written down why here.

The good thing about the hug: it is the smallest walkable step back. No clear-the-air conversation, no grand plan — eight seconds of not being the first to let go. If you want to try this week:

1. 01Don't be the first to let goAt the next hug with someone you trust: stay one breath longer than you automatically would. The London data says five to ten seconds feel right — you don't need to count them.
2. 02More often rather than perfectThe meta-analysis is clear on this: frequency counts for more than duration. Better short and real every day than the one grand gesture a month.
3. 03Asking is part of the gesture“May I hug you?” does not make a hug smaller — it makes it safer. And sometimes the question itself is already half the closeness.

And if while reading you rather thought: I don't actually like being touched much — that too is a legitimate answer and not a defect. Closeness has many forms: the hand on a shoulder, shared silence, and yes, the weighted blanket has its own body of research. Forced hugs do not work — consent is not a courtesy, it is part of the mechanism.

This article reflects the state of psychological research and is intended as everyday orientation. The study results cited are research findings, not promises of effect. The impulses described support general wellbeing and holistic balance. They do not constitute a medical diagnosis, promise no cure, and do not replace medical or therapeutic treatment.