Cold plunge vs cryotherapy

The short version: whole-body cryotherapy is a commercial service — a chamber cooled with nitrogen vapor or refrigerated air, a session of two to three minutes, bought per visit or as a package. A cold plunge is a tub of cold water you own. The air in a cryo chamber is far colder than any plunge, but air moves heat far less efficiently than water, so the two are much closer in what they do to you than the temperature numbers suggest. The practical differences are cost structure and access, and those favor the plunge decisively.

Side by side

Why colder air is not automatically colder for you

This is the part that gets lost. Water conducts heat away from a body far faster than air does, which is why 50 °F water feels brutal and 50 °F air feels like a mild spring day. A cryo chamber compensates by going much colder and keeping the session very short. The result is that a two-minute cryo session and a two-minute plunge are doing broadly comparable things by different routes — and it is why the temperature on the chamber's display is not a number you can compare with the one on your chiller.

What the research has looked at

We are not going to adjudicate outcomes here. What is worth knowing before you spend money either way is that the cold water immersion literature is considerably larger and older than the whole-body cryotherapy literature, and that much of both is small-sample work in athletic populations. Our cold plunge benefits evidence page sets out what has actually been studied for immersion, including where the limits are. If a studio tells you cryotherapy is clinically proven for a specific condition, ask them for the paper.

The cost structure is the real decision

Cryotherapy is a subscription to someone else's equipment. A plunge is a capital purchase followed by electricity, filters and water treatment — our cold plunge running costs page has the arithmetic. If you plunge three times a week, the crossover point where the tub is cheaper than the studio arrives quickly, and after it the tub keeps getting cheaper. The honest counter-argument is adherence: a studio you have paid for creates an obligation, and a tub in the garage creates only an option. If you know you need the obligation, that is a real reason to buy sessions rather than a tub.

Where each one wins

• Cryotherapy, if you want it dry, you dislike being wet, you want it supervised, or you only want it occasionally and a studio is nearby.
• A cold plunge, if you want it daily, at 6 a.m., without leaving the house — and you are prepared to look after the water.
• A plunge, also, if you want to pair cold with heat. The contrast routine needs both at hand, and no studio schedule survives that.
• Neither, first, if you have not tried cold at all. A cold shower costs nothing and tells you a great deal.

Every pick on this page comes from published specifications, not from hardware we own. Read how we pick — including what spec-led ranking cannot tell you.