Cryotherapy: How It Works, Benefits, Risks, and What the Research Shows

What Is Cryotherapy, Really?

If you have seen athletes stepping into futuristic-looking pods surrounded by clouds of nitrogen vapor, you have seen cryotherapy in action. But the concept itself is far older than the sleek machines. Humans have used cold therapeutically for thousands of years, from Hippocrates prescribing cold water for swelling to Nordic traditions of ice bathing after saunas.

Modern whole-body cryotherapy was developed in 1978 by Japanese rheumatologist Dr. Toshima Yamaguchi, who discovered that brief exposure to extreme cold provided significant relief for rheumatoid arthritis patients. Since then, the practice has expanded from clinical rheumatology into sports medicine, pain management, neurology, and mainstream wellness. It is now one of the fastest-growing modalities in regenerative and integrative health.

The core idea is elegant in its simplicity: expose the body to extreme cold for a very short period, triggering a cascade of physiological responses that reduce inflammation, boost mood, accelerate recovery, and potentially offer a range of other health benefits. But as with every modality we cover on this site, the devil is in the details, and the evidence picture is more nuanced than most marketing materials would have you believe.

Let us walk through what cryotherapy actually does to your body, what the research genuinely supports, where the claims get ahead of the science, and how to decide whether it belongs in your health toolkit.

Types of Cryotherapy: Understanding Your Options

Not all cold therapy is created equal. The term “cryotherapy” gets applied to everything from a $200,000 whole-body chamber to a bag of frozen peas on your knee. Here is what actually distinguishes the major approaches.

Whole-Body Cryotherapy (WBC) Chambers

These are walk-in rooms cooled to between -110°C and -140°C (-166°F to -220°F) using liquid nitrogen or electrically cooled air. You enter wearing minimal clothing, typically shorts or underwear, socks, gloves, and ear protection, and stay for 2 to 4 minutes. The entire body, including the head, is exposed to the cold. Electric chambers cool all sides evenly and allow you to breathe the cooled air; nitrogen-cooled rooms typically keep your head above the cold zone for safety reasons.

Cryo Saunas (Partial-Body Cryotherapy)

These are the upright, cylindrical units you see in most cryotherapy studios. Your body is enclosed from the neck down while nitrogen-cooled vapor drops temperatures to around -130°C to -170°C. Your head stays above the unit, breathing room-temperature air. Sessions run 2 to 3 minutes. Cryo saunas are more common than full walk-in chambers because they are significantly less expensive to purchase, operate, and install.

Localized Cryotherapy

A handheld device directs a focused stream of cold vapor or cooled air to a specific body area, a sore shoulder, an inflamed knee, or a post-surgical site. Temperatures are similar to WBC, but the application is concentrated on one region. Sessions last 5 to 12 minutes per treatment area. This approach is commonly used in physical therapy clinics, sports medicine facilities, and orthopedic rehabilitation programs.

Ice Baths and Cold Plunges

The accessible, low-tech option that has exploded in popularity. Water temperatures typically range from 0°C to 15°C (32°F to 59°F), and immersion lasts anywhere from 2 to 15 minutes. Cold plunge tubs designed for home use now range from simple ice-filled stock tanks to thermostatically controlled units costing several thousand dollars. While not technically “cryotherapy” in the clinical sense, cold water immersion activates many of the same physiological pathways and has a significantly deeper research base than WBC.

How Cryotherapy Works: The Three Core Mechanisms

The Mechanism in Greater Detail

When your skin temperature drops rapidly, and in a WBC chamber, skin surface temperature can plummet to near 0°C within 30 seconds, your body interprets this as a survival-level threat and launches a coordinated stress response. Understanding this response helps explain both the benefits and the limitations of cryotherapy.

Cold Shock Proteins

One of the most exciting areas of cryotherapy research involves cold shock proteins, particularly RNA-binding motif protein 3 (RBM3). Animal studies have shown that cold exposure upregulates RBM3, which appears to protect synapses from degradation and may even promote synaptogenesis, the formation of new neural connections. Research in hibernating mammals has demonstrated remarkable neuroprotective effects linked to these proteins. While human research on cold shock proteins is still in its early stages, this mechanism may partly explain why so many people report improved mental clarity, sharper focus, and elevated mood after cold exposure.

Norepinephrine Release

This is arguably the best-documented mechanism of cryotherapy and deserves special attention. Whole-body cold exposure consistently produces a significant, dose-dependent increase in circulating norepinephrine, a neurotransmitter and hormone that affects attention, focus, vigilance, mood, and pain perception. A well-cited study published in the European Journal of Applied Physiology demonstrated that WBC at -110°C produced a 2- to 3-fold increase in plasma norepinephrine, and this increase was sustained for at least an hour after the session. Importantly, cortisol (the stress hormone) did not increase proportionally, meaning cryotherapy produces the alerting, mood-boosting effects of norepinephrine without the negative effects of chronic stress activation. This single mechanism likely accounts for the majority of the mood-boosting, pain-reducing, and anti-inflammatory effects that users consistently report.

Vasoconstriction and Vasodilation Cycling

The rapid constriction of peripheral blood vessels during cold exposure, followed by strong dilation upon rewarming, creates a pumping effect with several therapeutic consequences: metabolic waste products are flushed from tissues more efficiently, fresh oxygenated blood is delivered in greater volume, and localized swelling is reduced mechanically. For athletes recovering from intense training, individuals dealing with inflammatory joint conditions, or anyone managing post-surgical healing, this vascular cycling may meaningfully accelerate the recovery timeline.

Systemic Inflammation Modulation

Beyond the norepinephrine-mediated anti-inflammatory effect, cold exposure appears to reduce inflammation through additional, complementary pathways. Studies have shown decreased levels of prostaglandins (inflammatory lipid compounds), reduced activity of matrix metalloproteinases (enzymes involved in tissue breakdown during chronic inflammation), and modulation of the NF-kB inflammatory signaling pathway, one of the master regulators of the immune-inflammatory response. The net effect is a broad-spectrum reduction in inflammatory activity that differs mechanistically from what NSAIDs or corticosteroids achieve, which is one reason cryotherapy may complement pharmaceutical approaches rather than simply duplicating them.

What Does the Evidence Actually Show?

Here is where we put on our critical-thinking hats. Cryotherapy has genuine evidence behind several use cases, but it also has areas where the hype has significantly outpaced the science. We believe you deserve an honest assessment of both.

Muscle Recovery and Sports Performance

PROMISING, Growing RCT Evidence

This is cryotherapy’s strongest use case from an evidence standpoint. Multiple randomized controlled trials have examined WBC for post-exercise recovery, and the overall picture is cautiously positive. A 2017 systematic review in Sports Medicine found that WBC was associated with reduced muscle soreness (delayed onset muscle soreness, or DOMS), lower perceived fatigue, and improvements in some, though not all, markers of muscle damage compared to passive recovery or no intervention.

A 2015 Cochrane review of cold water immersion found moderate-quality evidence supporting its use for reducing DOMS after exercise, with benefits most apparent 24-96 hours post-exercise. While this review focused on cold water immersion rather than WBC specifically, the overlapping mechanisms make these findings relevant to the broader cryotherapy discussion.

Important caveats deserve mention. Many WBC studies have relatively small sample sizes (20-40 participants). Blinding is inherently challenging, participants notice when they are standing in a -130°C chamber. And some comparative studies have found that cold water immersion, which is far cheaper and more accessible, produces comparable or even superior results for certain recovery markers. The evidence suggests WBC genuinely works for recovery, but it may not offer a dramatic advantage over a well-executed cold plunge protocol for most athletes.

Pain Management

PROMISING

Several studies have investigated WBC for chronic pain conditions, particularly fibromyalgia, rheumatoid arthritis, ankylosing spondylitis, and chronic low back pain. Results have been generally positive: patients report significant reductions in pain intensity, improved physical function, and in some cases, reduced reliance on pain medication. The original Japanese research on rheumatoid arthritis was compelling, and subsequent European studies, particularly from Poland, where WBC research has been most active, have largely confirmed those early findings.

Where the evidence falls short is in long-term follow-up data. Most studies measure outcomes during or shortly after a course of WBC sessions (typically 10-20 sessions over 2-4 weeks). Whether the benefits persist for weeks or months afterward, or whether ongoing maintenance sessions are necessary, remains incompletely answered. For pain management, cryotherapy appears to be a genuinely useful tool, but it likely works best as part of a multimodal approach alongside physical therapy, exercise, and other interventions rather than as a standalone treatment.

Inflammation Reduction

PROMISING

The anti-inflammatory effects of cryotherapy are well-documented at the mechanistic level: we know cold exposure reduces pro-inflammatory cytokines and increases anti-inflammatory mediators. Clinical studies in patients with inflammatory conditions have shown measurable reductions in markers like CRP (C-reactive protein), IL-6, and TNF-alpha after courses of WBC treatment.

The practical question is about magnitude and duration. For acute inflammation, after an injury, a surgery, or an intense training session, cryotherapy’s anti-inflammatory effect is clinically meaningful and well-supported by evidence. For chronic systemic inflammation (the low-grade, persistent kind associated with metabolic syndrome, autoimmune conditions, or aging), the picture is less clear. It is biologically plausible that regular cold exposure could help manage chronic inflammation over time, but we need larger, longer-duration studies with better controls to confirm this with confidence.

Mood and Depression

PROMISING, Norepinephrine-Mediated

The mood-boosting effects of cold exposure are one of the most consistently reported subjective benefits, and they have a solid mechanistic basis. The surge in norepinephrine triggered by cold exposure is the same neurotransmitter targeted by SNRI antidepressant medications (serotonin-norepinephrine reuptake inhibitors). A 2008 study proposed cold hydrotherapy as a potential adjunctive treatment for depression, noting that cold exposure activates the sympathetic nervous system and increases blood levels of beta-endorphin and norepinephrine.

Pilot studies of WBC for depression and anxiety have found significant improvements in mood scores after a course of treatments, with participants reporting reductions in anxiety, fatigue, irritability, and depressive symptoms. A 2019 study found that adding WBC to standard psychiatric treatment improved outcomes for patients with depressive and anxiety disorders compared to treatment alone. While these studies are still too small to be considered definitive, the consistent subjective reports combined with the well-established neurochemical mechanism make this a credible and actively researched application.

Weight Loss and Metabolism

OVERSTATED

This is where cryotherapy marketing most aggressively outpaces reality. You will encounter claims that a single WBC session can burn 500-800 calories. The actual research paints a starkly different picture. While cold exposure does increase metabolic rate, your body must work harder to maintain core temperature, the caloric expenditure during a 3-minute WBC session is modest, estimated at approximately 50-100 additional calories beyond resting metabolic rate at most.

Cold exposure can activate brown adipose tissue (BAT), a metabolically active form of fat that burns calories to generate heat. This is real and well-established physiology. However, the degree of BAT activation from brief WBC sessions is unlikely to produce clinically meaningful weight loss on its own. Regular cold plunge practice with longer exposure times (10-15 minutes at 10-15°C) may have a somewhat greater metabolic effect due to prolonged thermal stress, but even then, cold exposure remains a minor contributor to total energy expenditure compared to exercise and dietary patterns. If weight loss is your primary goal, cryotherapy is not a meaningful shortcut, and anyone telling you otherwise is prioritizing sales over science.

Anti-Aging

OVERSTATED

Claims that cryotherapy is an anti-aging treatment are based on logical extrapolations from its anti-inflammatory and antioxidant effects. The reasoning goes: chronic inflammation drives aging (the concept of “inflammaging”), cryotherapy reduces inflammation, therefore cryotherapy slows aging. While the premise about inflammation and aging is well-established in the gerontology literature, the leap to cryotherapy as an anti-aging intervention is not supported by direct evidence in humans.

No published studies have demonstrated that cryotherapy extends lifespan, reverses biological aging markers (like epigenetic clocks), reduces telomere shortening, or produces objectively measurable anti-aging outcomes. It may contribute to healthy aging as one component of a in-depth wellness strategy, reduced inflammation and better recovery certainly support long-term health, but marketing it as an anti-aging treatment is misleading. We prefer to be straightforward about this, even though it is less exciting than the alternative narrative.

WBC vs. Cold Plunge: The Comprehensive Comparison

This is one of the most common questions we receive, and it deserves a thorough, honest answer. Here is how whole-body cryotherapy and cold water immersion actually compare across every dimension that matters.

Safety, Risks, and Contraindications

Cryotherapy has a generally favorable safety profile when administered properly, but the word “properly” is doing substantial work in that sentence. The risks are real and worth understanding thoroughly before you step into a chamber or submerge yourself in cold water.

Frostbite and Cold Injuries

This is the most commonly reported adverse event in the medical literature. Frostbite can occur if skin is wet during the session (moisture dramatically accelerates heat transfer from the body), if metal jewelry is worn (metal conducts cold efficiently and can cause contact frostbite), or if sessions exceed recommended durations. Extremities, fingers, toes, ears, and nose, are most vulnerable because they have the highest surface-area-to-volume ratio and the least insulation. Any reputable cryotherapy facility will provide protective gloves, socks, and ear coverings, will confirm that your skin is completely dry before the session, and will enforce strict time limits with visible countdown timers.

Cardiovascular Stress

The rapid vasoconstriction triggered by extreme cold causes a transient but significant spike in blood pressure. Heart rate may also increase as the body activates its sympathetic nervous system response. For healthy individuals, this is a normal acute stress response that resolves quickly upon rewarming and does not pose a meaningful risk. However, for people with uncontrolled hypertension, known cardiac arrhythmias, unstable angina, or a recent history of cardiovascular events, this hemodynamic stress could be genuinely dangerous. Anyone with cardiovascular concerns should consult their physician before trying any form of cryotherapy, including cold plunges.

Nitrogen Safety Concerns with Cryo Saunas

Nitrogen-cooled cryo saunas work by releasing liquid nitrogen that displaces oxygen in the immediate treatment environment. In poorly ventilated spaces, this can create a localized low-oxygen zone that poses asphyxiation risk. There have been rare but serious incidents, including at least one documented fatality involving a nitrogen-cooled unit used after hours without supervision. Reputable facilities mitigate this risk by installing continuous oxygen monitors, ensuring adequate room ventilation, and maintaining strict policies against unsupervised use. Electrically cooled WBC chambers do not carry this particular risk, as they do not use nitrogen.

Setting Realistic Expectations (The Financial Risk)

Perhaps the most widespread “risk” of cryotherapy is financial. At $50 per session, a committed cryotherapy routine of 3-4 sessions per week adds up to $600-$800 per month, or $7,200-$9,600 per year. If you are pursuing cryotherapy for benefits that the evidence categorizes as overstated, such as dramatic weight loss or meaningful anti-aging effects, you may invest significant money without achieving your primary goals. Understand the evidence field before committing financially, match your expectations to what the research actually supports, and you will make far better decisions about whether and how to incorporate cryotherapy into your health strategy.

Cost Breakdown: What You Will Actually Spend

How to Get Started with Cryotherapy: A Practical Roadmap

If you are interested in exploring cryotherapy, here is a step-by-step approach that minimizes risk and maximizes your ability to evaluate whether it is right for you.

Step 1: Start with cold showers (free, zero commitment). Before spending any money, test your cold tolerance and your body’s response. End your regular shower with 30 seconds of the coldest water available. Gradually build to 1-2 minutes over a period of 2 weeks. Pay attention to how you feel afterward, the mood lift, the alertness, the energy. If you find this completely intolerable or notice adverse reactions, a WBC chamber will not be a good experience for you.

Step 2: Try a single studio session. Book one WBC or cryo sauna session at a reputable facility. Expect to pay $50-$75 for a first visit. Before committing, evaluate the facility: ask about their safety protocols, staff training, equipment maintenance schedule, and oxygen monitoring (for nitrogen units). Pay attention to how you feel during and for 24 hours after the session.

Step 3: Complete a short evaluation course. If you respond well to your initial session, try a package of 8-10 sessions over 2-3 weeks. This mirrors the typical protocol used in most published research studies and will give you a clinically meaningful sense of whether cryotherapy provides noticeable, sustained benefits for your specific health goals.

Step 4: Evaluate honestly and make a long-term decision. After your evaluation course, assess with genuine objectivity: Did your pain decrease measurably? Did your recovery between workouts improve noticeably? Did your mood stabilize or lift? If the answer is clearly yes, decide whether ongoing studio visits are financially sustainable or whether a home cold plunge setup would be more practical and cost-effective for the long term. If the benefits were marginal, you have saved yourself from a potentially expensive ongoing commitment.

Frequently Asked Questions About Cryotherapy

Is cryotherapy safe for most people?

For healthy adults without the specific contraindications listed above, cryotherapy has a good safety record when performed at a reputable facility with properly trained staff. The primary risks are frostbite (preventable with correct protocols including dry skin, protective clothing, and strict time limits), acute blood pressure elevation (relevant primarily for those with pre-existing cardiovascular conditions), and oxygen displacement in nitrogen-cooled units (prevented by adequate ventilation and continuous monitoring). Always provide your complete medical history before your first session, and do not rely on a facility that does not ask for it.

How often should you do cryotherapy for best results?

Research protocols typically use 3-5 sessions per week for a course of 2-4 weeks. For ongoing maintenance, 2-3 sessions per week is the most common frequency in both research and clinical practice. More is not necessarily better, there appears to be a threshold of diminishing returns beyond which additional sessions provide minimal incremental benefit. Many competitive athletes use cryotherapy strategically after their most intense training sessions rather than adhering to a rigid schedule, which may be the most practical and effective approach for most people.

Does cryotherapy really burn significant calories?

Cryotherapy does increase caloric expenditure, but far less than many providers claim. A 3-minute WBC session may burn an additional 50-100 calories beyond your resting metabolic rate, not the 500-800 calories some marketing materials advertise. Cold exposure does activate brown adipose tissue (BAT) and transiently increases metabolic rate, but the magnitude and duration of this effect from brief WBC sessions is modest at best. Regular, longer-duration cold water immersion may have a somewhat greater cumulative metabolic impact, but even then, cold exposure is a minor factor in total energy balance compared to exercise and nutrition. If meaningful calorie burning is your primary objective, physical activity remains orders of magnitude more effective.

What is the real difference between cryotherapy and an ice bath?

The fundamental difference lies in the cooling medium. Cryotherapy uses extremely cold air (-110°C to -140°C), while ice baths use cold water (0°C to 15°C). Despite the enormous temperature gap, the physiological effects are largely comparable because water conducts heat approximately 25 times more efficiently than air, meaning a 5°C water immersion extracts body heat at a rate similar to a much colder air environment. Ice baths also provide hydrostatic pressure (the gentle compression of water surrounding your body), which WBC chambers cannot replicate. Both approaches trigger the cold stress response through overlapping mechanisms; they represent different delivery methods for achieving a similar physiological outcome.

Can cryotherapy help with arthritis and joint conditions?

The research is encouraging, particularly for inflammatory types of arthritis. Cryotherapy was originally developed specifically for rheumatoid arthritis by Dr. Yamaguchi, and studies conducted over the subsequent decades have shown reductions in pain intensity, morning joint stiffness, and circulating inflammatory markers in RA patients. Evidence is also positive for ankylosing spondylitis. For osteoarthritis, the evidence is less strong but still generally supportive for symptom management, particularly joint pain and stiffness. Cryotherapy should complement, never replace, your rheumatologist’s treatment plan, and it works best when combined with appropriate exercise, physical therapy, and any prescribed medications.

Is cryotherapy covered by health insurance?

In most cases, no. Cryotherapy is generally classified as an elective wellness service rather than a covered medical treatment by insurance providers. Some limited exceptions exist: if cryotherapy is provided as a component of a physical therapy session by a licensed physical therapist, the PT visit itself may be covered (though the cryotherapy modality typically is not separately billable as a distinct line item). FSA and HSA accounts may cover cryotherapy expenses with a letter of medical necessity from your physician, but this varies significantly by plan administrator and is not guaranteed. Check with your specific plan before assuming coverage.

Should I do cryotherapy before or after my workout?

For post-exercise recovery, the use case with the strongest evidence, the answer is after your workout. Post-workout cryotherapy leverages the anti-inflammatory, analgesic, and vascular effects to accelerate recovery from training-induced muscle damage. However, there is an important nuance for strength athletes: emerging research suggests that cold exposure immediately after resistance training may partially blunt some of the adaptive inflammatory signaling that drives muscle hypertrophy (growth) and strength gains over time. If your primary training goal is building muscle mass or maximal strength, consider waiting 2-4 hours after lifting before cold exposure, or reserve cryotherapy sessions for non-lifting days. For endurance training, cardiovascular work, or sport-specific training, immediate post-workout cold exposure does not appear to have the same interference effect on adaptation.

How does cryotherapy compare to other recovery and healing modalities?

Cryotherapy is one important tool in a growing recovery toolbox, and it works through mechanisms that are largely distinct from other popular modalities. Red light therapy (photobiomodulation) uses specific wavelengths of light to enhance mitochondrial function and cellular repair, a completely different pathway from cold stress. Hyperbaric oxygen therapy delivers oxygen under pressure to enhance tissue healing and has its own substantial evidence base, particularly for wound healing and post-concussion recovery. Shockwave therapy uses acoustic waves targeted at specific musculoskeletal injuries to stimulate healing responses. These modalities are not competitors in any meaningful sense, they are complementary approaches that address different aspects of recovery and healing and can be combined strategically. Many advanced sports medicine clinics and regenerative health centers now offer several of these modalities under one roof precisely because they work well together.

Related Topics on Regenerated

If you are researching cryotherapy, these related pages may be valuable for your understanding:

• Red Light Therapy, Photobiomodulation for cellular repair, pain relief, and recovery
• Joint Pain, in-depth guide to managing joint pain with conventional and integrative approaches
• Hyperbaric Oxygen Therapy, Pressurized oxygen therapy for tissue healing and recovery
• Shockwave Therapy, Acoustic wave therapy for musculoskeletal conditions and chronic pain