Do Cold Plunges Reduce Inflammation? What the Science Shows

Quick Answer

Cold plunges can reduce muscle soreness, but there is limited evidence that they actually reduce inflammation.

Cold water immersion can make people feel more recovered after strenuous exercise and may reduce delayed-onset muscle soreness. But studies measuring inflammatory markers such as CRP, IL-6, inflammatory cells, and muscle cytokines have produced inconsistent results.

One direct human muscle biopsy study found that cold water immersion was no better than active recovery at reducing post exercise inflammation.

A 2025 systematic review even found that inflammatory measures temporarily increased immediately after cold water immersion, although the evidence was too heterogeneous to conclude that cold exposure itself causes harmful inflammation.

The most accurate conclusion is:

Cold plunges may be useful for recovery, but they are not a proven anti-inflammatory therapy.

What the Science Says

Cold water rapidly lowers skin and muscle temperature, constricts blood vessels, and changes nerve signaling and circulation.

These effects can reduce pain perception and may help people feel less sore after exercise.

But soreness, muscle damage, and inflammation are not the same biological process.

A 2023 meta-analysis found that cold water immersion improved soreness and several short-term recovery measures but did not significantly reduce CRP or IL-6 during the first 48 hours after exercise.

Similarly, a controlled muscle-biopsy study found that cold water immersion did not meaningfully reduce inflammatory-cell infiltration or inflammatory cytokine responses compared with active recovery.

So while cold exposure clearly changes recovery physiology, evidence that it consistently suppresses inflammation is weak.

Less Soreness Does Not Necessarily Mean Less Inflammation

Cold-water immersion is one of the better-supported recovery strategies for reducing delayed onset muscle soreness.

A recent 2026 meta-analysis of 52 studies found reductions in soreness, creatine kinase, and myoglobin after cold water immersion.

But creatine kinase and myoglobin mainly reflect muscle damage, not inflammation itself.

Cold also affects pain signaling, which can make muscles feel better even if the underlying inflammatory response has not changed much.

This is the key distinction:

Feeling less sore is evidence of improved perceived recovery not proof that inflammation has been switched off.

What Happens to Inflammatory Markers?

Direct evidence is mixed.

In one important study, participants performed strenuous resistance exercise and then completed either cold water immersion or active recovery.

Muscle biopsies collected over the next 48 hours showed increases in inflammatory cells and cytokines after exercise, but those responses were not significantly lower with cold-water immersion.

Another meta-analysis found no meaningful effect of cold-water immersion on CRP or IL-6 during recovery.

The 2025 systematic review of cold-water immersion and health outcomes reported something even more interesting: pooled inflammatory measures increased immediately and one hour after cold exposure.

That does not mean cold plunges are necessarily inflammatory or harmful.

The studies were small and heterogeneous, and several involved exercise or other physiological stressors.

But the results clearly argue against the simplistic claim that cold exposure reliably “reduces inflammation.”

Recovery Benefits Can Come With a Training Trade-Off

Cold water immersion may still be useful when rapid recovery matters.

Athletes competing again soon after a difficult event may value reduced soreness more than maximizing every long-term training adaptation.

Resistance training is different.

Some inflammatory and cellular stress signals after lifting are part of the process that stimulates muscle remodeling.

A long term training study found smaller gains in muscle mass and strength when cold water immersion was repeatedly used immediately after resistance exercise compared with active recovery.

A 2024 meta-analysis similarly concluded that regular post-workout cold-water immersion may modestly reduce muscle hypertrophy, although the evidence quality remains limited.

This does not mean an occasional cold plunge destroys muscle growth.

It means that using one immediately after every strength session may be unnecessary if maximizing hypertrophy is the primary goal.

Limitations Summary

Cold plunge research has several important limitations.

Studies often group together soreness, creatine kinase, CRP, cytokines, swelling, and immune cell responses under the general label of “inflammation,” even though they measure different processes.

Cold water protocols also vary considerably, and most studies involve relatively young, physically active men.

Most importantly, current evidence does not show that habitual cold plunging prevents cardiovascular disease, autoimmune disease, cancer, dementia, or other chronic conditions by lowering inflammation.

Claims about long term disease prevention therefore remain speculative.

What This Means in Real Life

Cold-water immersion makes the most sense as a situational recovery tool.

If you are sore after a demanding endurance event, tournament, or unusually hard training session, it may help reduce discomfort and improve perceived recovery.

If your main goal is building muscle, routinely plunging immediately after every resistance-training session may be less useful because it could modestly interfere with adaptation.

And if your goal is simply to reduce chronic inflammation or improve longevity, current evidence is not strong enough to say regular cold plunges accomplish that.

Cold immersion is also not risk free.

Sudden cold exposure produces a cold-shock response that can cause rapid breathing, changes in blood pressure, and cardiovascular stress. Extra caution is appropriate for people with cardiovascular disease or known heart-rhythm problems.

Key Takeaway

Cold plunges can reduce muscle soreness, but they are not proven to broadly reduce inflammation.

The evidence is much stronger for short term recovery than for systemic anti-inflammatory effects.

Frequent use immediately after resistance training may also modestly interfere with muscle adaptation.

The most evidence based conclusion is:

Cold plunges are a potentially useful recovery tool not a proven way to “turn off inflammation.”

Sources

Effects of cold-water immersion on health and wellbeing: A systematic review and meta-analysis

Tara Cain, Jacinta Brinsley, Hunter Bennett, Max Nelson, Carol Maher, Ben Singh. PLOS ONE. 2025.

Systematic Review DOI: 10.1371/journal.pone.0317615 PMID: 39879231

Major recent evidence concerning inflammatory, stress, sleep, immune, and wellbeing responses to cold-water immersion.

Temperature-dependent effects of post-exercise cold-water immersion on recovery: a systematic review and meta-analysis

Yunah Jeon & Hyo-Seong Yeo. BMC Sports Science, Medicine and Rehabilitation.BMC Sports Science, Medicine and Rehabilitation.. 2026.

Systematic Review DOI: 10.1186/s13102-026-01912-5

Contemporary synthesis of 52 studies evaluating soreness and muscle-damage outcomes after cold-water immersion.

The effects of cold water immersion and active recovery on inflammation and cell stress responses in human skeletal muscle after resistance exercise

Jonathan M Peake, Llion A Roberts, Vandre C Figueiredo, Ingrid Egner, Simone Krog, Sigve N Aas, Katsuhiko Suzuki, James F Markworth, Jeff S Coombes, David Cameron-Smith, Truls Raastad. The Journal of Physiology. 2017.

Clinical Trial DOI: 10.1113/JP272881 PMID: 27704555

Key direct evidence showing that cold-water immersion did not reduce inflammatory-cell infiltration or cytokine responses compared with active recovery.

Effects of cold water immersion after exercise on fatigue recovery and exercise performance--meta analysis

Feiyan Xiao, Anastasiia V Kabachkova, Lu Jiao 1, Huan Zhao, Leonid V Kapilevich. Frontiers in Physiology. 2023.

Meta Analysis DOI: 10.3389/fphys.2023.1006512 PMID: 36744038

Shows improved soreness and recovery outcomes but no significant reduction in CRP or IL-6 during the first 48 hours after exercise.

Throwing cold water on muscle growth: A systematic review with meta‐analysis of the effects of postexercise cold water immersion on resistance training‐induced hypertrophy

Alec Piñero, Ryan Burke, Francesca Augustin, Adam E Mohan, Kareen DeJesus, Max Sapuppo, Max Weisenthal, Max Coleman, Patroklos Androulakis‐Korakakis, Jozo Grgic, Paul A Swinton, Brad J Schoenfeld. European Journal of Sport Science. 2024.

Systematic Review DOI: 10.1002/ejsc.12074 PMID: PMC11235606

Main evidence concerning possible attenuation of resistance-training-induced muscle hypertrophy with repeated immediate post-exercise cold-water immersion.

Post-exercise cold water immersion attenuates acute anabolic signalling and long-term adaptations in muscle to strength training

Llion A Roberts, Truls Raastad, James F Markworth, Vandre C Figueiredo, Ingrid M Egner, Anthony Shield, David Cameron-Smith, Jeff S Coombes, Jonathan M Peake. The Journal of Physiology.. 2015.

Clinical Trial DOI: 10.1113/JP270570 PMID: 26174323

Found smaller muscle-mass and strength adaptations when cold-water immersion was repeatedly used after resistance training

Habituation of the cold shock response: A systematic review and meta-analysis

Martin J Barwood, Clare Eglin, Samuel P Hills, Nicola Johnston, Heather Massey, Terry McMorris, Michael J Tipton, Hitoshi Wakabayashi, Lisa Webster. Journal of Thermal Biology. 2024.

Meta Analysis DOI: 10.1016/j.jtherbio.2023.103775 PMID: 38211547

Safety evidence concerning the cold-shock response, including hyperventilation and cardiovascular stress during sudden cold-water exposure.

Medical disclaimer: This article is for educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for personal medical decisions.

Do Cold Plunges Actually Reduce Inflammation?