Is cryotherapy the same as a cold therapy machine?

Not necessarily. "Cryotherapy" covers two different things: whole-body chambers you stand in for a few minutes, and localized cold therapy applied directly to one area, like a knee or shoulder, often with a wrap or cuff. The research below is mostly about the localized kind, which is what's relevant after surgery.

Does research prove cold therapy works?

It shows a plausible mechanism, less inflammation, less swelling, some pain relief, and clinical practice relies on it heavily. But the evidence base, especially for long-term outcomes, is thinner than you'd expect for something this commonly recommended.

Is whole-body cryotherapy better than a local cold pack or machine?

Not based on the comparisons available. One study in rheumatoid arthritis patients found whole-body cryotherapy at extreme temperatures wasn't more effective for pain than local cryotherapy when both were paired with physiotherapy.

Are there downsides to cold therapy?

Yes. Applied wrong, too cold, too long, directly on skin, it can cause tissue damage. Whole-body chambers specifically have a reported history of adverse events, and none have FDA clearance for treating a specific medical condition.

Cryotherapy Benefits: What Research Actually Shows

Search “benefits of cryotherapy” and you’ll get two different products in the same results: whole-body cryo chambers, the walk-in rooms at recovery studios, and localized cold therapy, a wrap or cuff applied to one joint. They get lumped together constantly, and the research on them isn’t the same. Worth sorting out before talking about what “works.”

Two different things wearing one name

Whole-body cryotherapy means standing in an extremely cold chamber, often below -100°C, for one to several minutes. It’s marketed for recovery, mood and general wellness.

Localized cold therapy means applying cold to one specific area, a knee after surgery, a shoulder after a repair, usually for much longer sessions and at far milder temperatures. This is what’s relevant to post-surgical recovery, and it’s the focus here.

Mixing the two up matters because the evidence doesn’t transfer cleanly between them, and because localized devices and whole-body chambers sit under completely different levels of scrutiny.

What the mechanism is supposed to be

Cold therapy’s proposed benefits come down to three things: it narrows blood vessels near the surface, which is thought to limit swelling; it slows local metabolic activity in the tissue, which may reduce inflammation; and it dulls nerve signaling, which is the pain-relief part people notice first.

That’s the theory, and it’s a reasonable one. The honest complication is that a 2020 review in Pain and Therapy, looking at both whole-body and local cryotherapy for chronic pain, found the exact mechanism and overall effectiveness still weren’t well established, even though clinicians prescribe it routinely [Pain and Therapy, 2020]. Widely used doesn’t automatically mean thoroughly proven. Both can be true.

What the comparisons actually show

The most useful study here isn’t about post-surgical recovery directly, it’s a head-to-head in rheumatoid arthritis patients, comparing whole-body cryotherapy at around -110°C against local cryotherapy, both alongside physiotherapy. The whole-body version didn’t come out ahead on pain relief [cited via Science-Based Medicine]. That’s a meaningful data point against the idea that colder or more dramatic automatically means more effective.

Separately, a narrative review of cryotherapy for exercise recovery found short-term reductions in muscle soreness and perceived fatigue, but inconsistent results once you look past the first day or two, and raised a genuine concern: frequent cooling right after training may blunt the muscle-adaptation process you’re trying to build. Worth knowing if you’re icing for performance rather than post-surgical swelling, those aren’t the same goal.

Where the evidence is thin

Two honest gaps worth naming. First, a lot of the strongest-sounding numbers in circulation come from secondary summaries of trials rather than the primary studies themselves, so treat any single statistic with some caution and look for the original when it matters to you. Second, no whole-body cryotherapy chamber has FDA clearance for treating a specific medical condition, and the literature has documented adverse events with that format specifically. None of that is a reason to avoid cold therapy generally, it’s a reason to be specific about which kind you mean and what it’s actually being used for.

What this means in practice

If you’re managing swelling and pain in one joint after surgery, the relevant evidence is about localized cold, not a whole-body chamber. The mechanism is plausible, the clinical use is widespread, and the honest summary is: likely helpful, not a cure, and worth doing consistently and correctly rather than searching for a more extreme version of it.

If your care team has you on a cold therapy plan, the rental page explains how a held-temperature machine executes it at home, five cold levels, compression built in, no ice runs.

What the Research Says About Cryotherapy's Benefits

Two different things wearing one name

What the mechanism is supposed to be

What the comparisons actually show

Where the evidence is thin

What this means in practice

Common questions