Cryotherapy has reasonable evidence behind it for reducing inflammation, easing muscle soreness after exercise, and managing certain types of chronic pain. The claims get shakier when it comes to weight loss and some of the more dramatic marketing promises. A typical whole-body session lasts about three minutes in a chamber cooled to somewhere between -225°F and -250°F, which triggers a cascade of stress responses your body uses to protect itself from the cold.
Here’s what the evidence actually supports, where it falls short, and what you should know before trying it.
How Cryotherapy Works in Your Body
When you step into extreme cold, your blood vessels constrict rapidly, which temporarily raises blood pressure and redirects blood flow toward your core organs. Once you step out, those vessels dilate again, flushing the treated areas with fresh blood. This constriction-dilation cycle is the basic mechanism behind most of cryotherapy’s benefits.
The cold also triggers a hormonal stress response. Your body releases a surge of adrenaline, noradrenaline, and endorphins, the same chemicals involved in a fight-or-flight reaction. That hormonal cocktail is partly why people often feel energized or euphoric after a session. Beyond the subjective feeling, studies have measured decreases in specific inflammatory markers and increases in anti-inflammatory markers after cryotherapy, confirming that something real is happening at a biological level, not just a placebo effect.
Muscle Recovery After Exercise
This is where cryotherapy has its strongest foothold. Athletes have been using cold exposure for decades, and the research backs it up, particularly for delayed-onset muscle soreness (the deep ache you feel 24 to 72 hours after a hard workout).
A large network meta-analysis published in Frontiers in Sports Sciences compared different cold therapies head to head. Whole-body cryotherapy produced the biggest reductions in creatine kinase, a key marker of muscle damage, at both 48 and 72 hours after exercise. Cold water immersion (ice baths) also helped, though the effect was smaller and didn’t always reach statistical significance beyond the immediate post-exercise window.
The practical takeaway: if you’re training hard and need to recover between sessions, whole-body cryotherapy appears to reduce the biological markers of muscle damage more effectively than ice baths alone. That said, ice baths are far cheaper and more accessible, and they still work. Cryotherapy offers an edge, not a revolution.
Chronic Pain and Inflammation
Cryotherapy shows genuine promise for chronic pain conditions driven by inflammation. A study on chronic low back pain found that patients experienced significant reductions in pain scores after just four sessions of whole-body cryotherapy. One month after completing treatment, all participants reported pain levels below 3 on a 10-point scale, and their functional disability scores improved as well.
The anti-inflammatory mechanism works in a straightforward way: cold slows nerve conduction, reduces the production of inflammatory signaling molecules, and temporarily dampens the immune activity that drives swelling and pain in conditions like rheumatoid arthritis and other inflammatory joint disorders. For people with chronic inflammatory pain who haven’t responded well to other treatments, cryotherapy can serve as a useful addition to their management plan.
Depression and Anxiety
One of the more surprising areas of research involves mental health. A study published in Archives of Psychiatry and Psychotherapy tested whole-body cryotherapy as an add-on treatment for people already receiving standard care for depression and anxiety. The group receiving cryotherapy showed significantly greater reductions in both depression and anxiety scores compared to the control group over a three-week period.
The improvements spanned nearly every symptom category measured, from insomnia and tension to depressed mood and cognitive difficulties. The likely explanation ties back to that hormonal surge: the rapid release of endorphins and noradrenaline during cold exposure mimics some of the neurochemical effects that antidepressants target, though through a completely different pathway. This doesn’t mean cryotherapy replaces psychiatric treatment, but the data suggests it can meaningfully boost outcomes when combined with standard therapy.
Skin Conditions Like Eczema
Cold therapy appears to help with atopic dermatitis (eczema) by reducing the inflammatory molecules that drive itching, redness, and skin barrier breakdown. Two studies tested whole-body cryotherapy on eczema patients without any concurrent use of steroid creams, immune-modulating ointments, or antihistamines, isolating the effect of the cold itself.
In one study, 18 patients receiving three sessions per week over four weeks saw significant improvements in disease severity scores, itching, and sleep quality. A second study of 14 patients treated over one month found similar results, with improvements in skin severity and moisture retention that lasted up to three weeks after the final session. For people with mild to moderate eczema who want to reduce their reliance on topical steroids, this is worth knowing about, though the studies are small.
The Weight Loss Question
This is where the gap between marketing and evidence is widest. Many cryotherapy clinics claim a single three-minute session burns up to 800 calories. The actual data tells a very different story.
The American Council on Science and Health reviewed the available research and concluded that the evidence is “limited, inconsistent, and well below the advertised 800 calories.” The best-designed study on cold exposure and calorie burn found that spending six hours per day at 15 to 16°C (about 59 to 61°F) for ten consecutive days increased energy expenditure by roughly 215 to 231 calories per day. That’s six hours of mild cold, not three minutes of extreme cold. Extrapolating from a brief cryotherapy session, the calorie burn is likely negligible.
Your body does burn some extra energy rewarming itself after a session, but the effect is small and inconsistent. Cryotherapy is not a meaningful weight loss tool.
What a Session Looks Like
Whole-body cryotherapy involves stepping into a cylindrical chamber (sometimes called a cryosauna) cooled by liquid nitrogen. Your head typically stays above the chamber. Sessions last about three minutes, and you wear minimal clothing, usually just socks, gloves, and underwear to protect extremities.
Localized cryotherapy targets a specific area, like a knee or shoulder, using a handheld device or smaller chamber. These sessions run five to ten minutes and are commonly used for sports injuries or joint pain.
Most people describe the sensation as intensely cold but tolerable, similar to standing in a freezer. The short duration is deliberate: long enough to trigger the physiological response, short enough to avoid tissue damage.
Who Should Avoid Cryotherapy
The rapid blood vessel constriction that makes cryotherapy useful also makes it risky for certain people. You should not use whole-body cryotherapy if you have uncontrolled high blood pressure, a history of heart attack or unstable chest pain, irregular heartbeat, a cardiac pacemaker, or any symptomatic cardiovascular disease. The temporary spike in blood pressure during a session can be dangerous for these conditions.
Other conditions that rule out cryotherapy include Raynaud’s syndrome (where fingers and toes lose blood flow in cold), peripheral artery disease, blood clots, recent stroke, uncontrolled seizures, cold allergy (cold-induced hives), severe anemia, pregnancy, open wounds, and active infections with fever. Claustrophobia is also a practical barrier, since the chambers are enclosed.
It’s worth noting that the U.S. Food and Drug Administration has not cleared or approved any whole-body cryotherapy devices. This means the industry operates without federal regulatory oversight of health claims, which is one reason marketing often outpaces the science.