Cortisol: what I stopped promising after a treatment

I spent years in properties where we promised a treatment would lower the guest’s cortisol. I said it too. I no longer say it — and that has changed my whole way of designing a programme.

The finding has been public since 2011 and has never been refuted: the effect of a single massage on cortisol is very small, often indistinguishable from zero. The authors of that review go further. They write that this is not the route through which massage delivers its real benefits on anxiety, pain and mood.

There is a second problem, this one methodological. A saliva sample only tells you about the previous quarter of an hour. The leading academic network on stress measurement says it plainly: it cannot inform on accumulated stress. An offer promising « measure your cortisol before and after » is therefore not merely fragile. It does not measure what it claims to measure.

What I do with that information, on assignment

I remove nothing. Massage remains one of the best-evidenced gestures in our profession — on anxiety, on pain, on mood. What I change is what we say about it, and what we build around it.

Because there is a more uncomfortable finding in the literature, and it is the one that changed my way of working the most.

On one side, the effect of a parenthesis fades. The research on holidays is unambiguous: the benefit is real, clear — and it disappears within the first days back. The most recent synthesis concludes that frequent holidays beat long ones.

On the other — and this is what the sector does not like to hear — increasing the dose does not increase the effect. More than two hundred trials, nearly sixteen thousand participants: no evidence that a longer meditation programme produces better results. The same goes for heart-rate coherence work.

Put together, these two findings say something very precise. What works is regularity. Not intensity.

Why this is good economic news

Because it invalidates the hardest product to sell — the intensive week presented as a transformation — and validates the most profitable models in hospitality: the membership, the scheduled return, remote follow-up, the short ritual the guest takes home.

I now design programmes in that order. What happens on site is a starting point, never the product. The product is what still holds six weeks later.

And sleep, in all this

It is the best-established lever, and the most neglected — because it does not sell in a treatment room.

One experiment is enough to make a management team understand. Volunteers slept six hours a night for two weeks. Their performance fell as far as after two sleepless nights. And on day fourteen, they reported feeling barely tired.

In other words: the clientele you welcome does not know what state they arrive in. That is precisely what a fine house can teach them.

It is also why I treat sleep as a hotel matter, not a spa one. Room temperature, silence, evening light, the time of the last service: none of this belongs to the wellness department, and all of it determines the outcome we claim to sell.

The word I changed

« Regulate » in place of « relax ». This is not a communications nuance. Relaxation is a state, obtained in the moment, which dissipates on the way home. Regulation is a capacity, built by repetition, which stays.

It is the only promise I still allow myself on this pillar. It is more sober. It has the advantage of being true.

Read next: the recovery circuit I dismantle and I stopped writing the word “detox”.

A programme that holds beyond the stay can be designed. Let’s talk. Contact me — or browse the Journal.

Further reading

• Sleep debt and how poorly we perceive it — landmark experiment, SLEEP, 2003
• Massage and cortisol — comprehensive review, Journal of Bodywork and Movement Therapies, 2011
• The fading benefit of holidays — meta-analysis, European Psychologist, 2023
• No dose effect in meditation — 203 trials, Mindfulness, 2020