What is whole-body cryotherapy, and how does it work?

Whole-body cryotherapy is a short exposure to extreme cold, standing in a chamber cooled to around minus 90°C for three to four minutes, used to prompt the body's own recovery response. It works by triggering a protective reaction to the cold: blood vessels near the skin narrow to preserve core warmth, and when you step out and rewarm, they open again and fresh blood moves back through the tissues, alongside a sharp, temporary rise in noradrenaline that helps dampen pain and inflammation. That coordinated response is what people are after when they use it to recover from hard training.

What actually happens, in sequence: extreme cold on the skin, blood vessels narrow, a surge of noradrenaline, then, on rewarming, vessels reopen and blood returns. The whole cycle takes minutes.

What a session involves

The process is simpler and more comfortable than the temperature suggests. You enter a chamber, usually in minimal clothing with hands, feet and ears protected, and stay in for three to four minutes while a guide remains with you throughout. The cold is dry rather than wet, which is the reason it is tolerable for a few minutes when an ice bath at a far milder temperature is not; dry air does not conduct heat away from the skin nearly as aggressively as water. You keep moving gently, you breathe, and you step out. Most people find the first thirty seconds the hardest, then settle. For a full walk-through of a first visit, see cryotherapy in Milton Keynes: what to expect.

The body's response, step by step

The mechanism is worth understanding, because it explains both the benefits and the limits. When your skin meets the extreme cold, the nervous system prioritises your core: surface blood vessels constrict to keep warm blood around the organs, and the cold stimulus drives a rise in noradrenaline, a chemical messenger involved in reducing the perception of pain and modulating inflammation. When you leave the chamber and rewarm, those vessels dilate again and freshly oxygenated blood flows back through the previously constricted tissues. This constrict-then-dilate cycle, together with the noradrenaline response, is thought to underlie the reduction in muscle soreness and the lift in alertness that people report.

How it differs from an ice bath or a cold shower

All cold exposure is not the same. An ice bath immerses you in cold water, which pulls heat from the body far faster and is tolerated at much milder temperatures for longer. A cold shower is milder still and localised to wherever the water hits. Whole-body cryotherapy is distinctive in exposing the whole body to very cold, dry air for a very short time. The practical differences are comfort, dose and convenience, and they matter when choosing what suits you, which we compare in our guide on cryotherapy versus an ice bath.

What it is for, and what it is not

Cryotherapy is a recovery aid. Its established, real-world use is reducing muscle soreness and the feeling of fatigue after demanding exercise, and supporting the alertness and sense of release many people value. It is not a treatment for injury or disease, and it does not burn meaningful calories or detoxify the body, claims that are sometimes made and are not supported by evidence. Understanding the mechanism makes those limits obvious: a two-minute circulatory and hormonal response is a helpful nudge to recovery, not a cure. For more on what it actually helps with, see the benefits of cryotherapy for recovery.

Why Hanbury Health is different

Understanding the mechanism is exactly why we do not treat cryotherapy as a one-off booth. Here it opens a guided recovery circuit that moves deliberately from cold, to compression, to the Shiftwave chair, so a single visit works three different systems in sequence rather than hammering one. An expert leads you through it, and the cold is placed where your body will actually benefit, which is a very different proposition from a self-serve chamber.