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Recovery: cold water, cryotherapy and massage guns, what the studies say

Strength and recovery8 min read
On this page
  1. Three questions, not one
  2. Cold water
  3. Whole-body cryotherapy
  4. Massage guns and foam rollers
  5. If there is an injury
  6. How to read a recovery claim
  7. How we reviewed it
  8. Sources

Three questions, not one

Talk about recovery mixes three goals. Perceived recovery: soreness, stiffness, heavy legs. Performance and adaptation: how well you do in the next session and what training builds over time. Injury: pain caused by tissue damage that needs a cause to be found. Studies measure different outcomes, often blood markers such as creatine kinase (CK), which do not equal race performance.1

On recovery strategies for endurance athletes, an umbrella review of 22 reviews (63 studies, 1100 athletes) concludes that no strategy shows consistent benefits. Cryotherapy and compression have positive effects in single studies, massage showed no effect in the data analysed. The authors call for better studies.1

Cold water

  • Perceived recovery: An umbrella review of 15 meta-analyses (2026) reports less muscle soreness up to 96 hours and lower CK between 24 and 72 hours.2
  • Performance: In the same analyses muscle power and jumping are better at 24-48 hours after intense or eccentric exercise, while jumping is worse in the first hours. For endurance the advantage appears right after the immersion and not on later days.2
  • Adaptation: In the 2026 review repeated use impairs strength and muscle mass gains. A 2024 meta-analysis of 8 studies indicates that immersion straight after strength training may blunt hypertrophy, with study quality fair to poor.2, 3
  • Limits of the evidence: The 2026 review rates methodological quality low to very low and certainty of evidence low to very low. Temperatures and durations vary a lot between studies, so we do not give a temperature or a time to follow. The authors conclude that use should depend on training phase and goals, not be applied after every session.2

Cold water safety

A position statement by Royal Life Saving Society Australia, AUSactive and SPASA (2024) lists the risks of cold water immersion: a shock response with hyperventilation, higher heart rate and blood pressure and, in extreme cases, cardiac arrhythmias; gasping and the risk of inhaling water; cramps; hypothermia or frostbite with very cold water or long exposure; panic attacks. It names as higher risk pregnant women, people with chronic or serious illness, heart or circulation problems, high blood pressure, autoimmune disease, cold sensitivity such as Raynaud's disease, and people on certain medications. For them it advises medical guidance before starting. Its measures include screening, warm-up before and after, gradual exposure from short durations and, in plunge pools, head and neck out of the water. It is a document written for facilities and operators: it is not evidence of effectiveness, and it does not say immersion is safe for everyone.4

Whole-body cryotherapy

  • Perceived recovery: The Cochrane review (searches to August 2015) found 4 studies in 64 active adults, almost all men. Some data suggest less soreness, but they include the possibility of no difference or of worse pain.5
  • Certainty and safety: Very low quality evidence for all outcomes. Cochrane concludes that the evidence is not enough to support its use against muscle soreness after exercise, and that dose and safety are not known. Adverse events were not reported in the 4 studies and were probably not monitored.5
  • After 2015: Reviews on endurance athletes report effects in single studies but no consistent conclusion.1 This guide did not re-read the individual studies published after the Cochrane review.

Cryotherapy safety

A whole-body chamber (air at about -50 to -150 °C) and a partial-body cryosauna with liquid nitrogen (about -190 °C) are different devices, and adverse-event data should not be mixed.6 A review by an international research group (2023) found 16 adverse events in 5 case reports and 2 randomised trials and considers the risks acceptable if contraindications are followed. The same authors write that serious events are documented only by case reports and that reporting may be underestimated.6 A consensus of 28 European experts, promoted by a working group of the International Institute of Refrigeration (2025), proposes a list of absolute and temporary contraindications: among them fever and current infections, pregnancy, uncontrolled high blood pressure, unstable heart or vascular disease, cold intolerance. It states that a medical assessment is needed before starting.7 For people with any of these conditions cryotherapy is not a choice to make alone.

Massage guns and foam rollers

  • Mobility: A 2023 systematic review (11 studies, moderate risk of bias in 10) finds short-term gains in mobility and flexibility, and less stiffness after a fatigue protocol. Long-term effects are unknown. It found no differences in perceived exertion and lactate. It does not recommend use before strength, balance, acceleration and jumping activities.8
  • Recovery after muscle damage: A 2026 meta-analysis of 12 randomised trials finds better jump recovery (low certainty) and lower CK (very low certainty). It finds no clear benefit for maximal strength recovery (moderate certainty) or next-day soreness (very low certainty).9
  • Duration and dose: The analyses on treatment duration are exploratory. The authors write that the results are preliminary and should not be read as thresholds to follow. So we give no times or frequencies.9
  • Foam rolling: A 2019 meta-analysis (21 studies) finds that after exercise it slightly reduces perceived pain and has a trivial effect on jumping. Before exercise it has a small effect on sprint and flexibility.10

Massage gun safety

A 2025 synthesis of case reports (weak level of evidence) collects harm after misuse: rhabdomyolysis, abdominal wall haematoma with urinary obstruction, vertebral artery dissection, two eye injuries. Three cases involve use on the face, eyes, neck or throat. Two involve people with conditions that contraindicated use. The authors write that evidence-based guidance on precautions and contraindications is missing.11 In the rhabdomyolysis case a young woman with untreated iron deficiency anaemia had received about 10 minutes of percussion on the thighs from a coach who took no medical history; she recovered after hospital care.12 In the dissection case a woman had used the gun for two hours on her neck against neck pain and had a stroke.13 These are single cases: they cannot estimate how often harm happens, and they do not show that use on thighs or calves is dangerous in itself. They show that the neck, the face and unassessed health conditions are what to avoid.

If there is an injury

Recovery soreness and injury pain are not the same thing. Pain that persists, gets worse, appears in a precise spot or has no clear cause should be assessed by a doctor or a physiotherapist. An editorial in the British Journal of Sports Medicine (2019, expert opinion, not a study) proposes the PEACE and LOVE criteria for soft-tissue injuries. In the first days it advises protecting from movements that aggravate and limiting prolonged rest, elevating the limb, compressing with a bandage and educating towards an active approach. It questions ice, because there is no high-quality evidence of its effectiveness and it could interfere with tissue repair. It advises against anti-inflammatory drugs in standard management. It cites early passive therapies such as electrotherapy, manual therapy and acupuncture as having insignificant effects compared with an active approach. In the following days it points to progressive loading, pain-free aerobic activity and exercise.14

For this reason a home device does not replace assessment and physiotherapy. Whether and how to use one with unexplained pain is for the person who assessed you to say. The choice of drugs is also for a doctor or pharmacist.

How to read a recovery claim

  1. Which outcome? Perceived soreness, next-day performance, long-term adaptation or injury are different questions.
  2. When? An effect right after use is not an effect at 24 or 48 hours.
  3. How certain is the evidence? Low certainty means a new study can change the picture.
  4. What is the risk? Cold, percussion and unassessed health conditions carry different risks.
  5. What does it not replace? Sleep, food and training load stay the base: see sleep and recovery and carbohydrate and hydration on the bike.

How we reviewed it

Document review of the sources: umbrella reviews, meta-analyses, Cochrane, position statements and case reports. Abstracts and main sections read; not all primary studies. No WOLF LAB tests.

Limits. Certainty of evidence low to very low almost everywhere. No temperature, duration or frequency given: study protocols differ too much. Cryotherapy studies published after the 2015 Cochrane review were not re-read one by one. Case reports cannot estimate how often harm occurs. Not medical advice.

Sources

  1. Li S et al. Effectiveness of Recovery Strategies After Training and Competition in Endurance Athletes: An Umbrella Review. Sports Medicine - Open, 2024. PMC.
  2. Strategic Application of Post-exercise Cold-Water Immersion to Enhance Performance Recovery and Adaptation: An Umbrella Review of 15 Published Systematic Reviews with Meta-analysis. Sports Medicine - Open, 30 September 2026. Springer.
  3. 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. European Journal of Sport Science, 2024. PMC.
  4. Royal Life Saving Society - Australia, AUSactive, SPASA. Position statement on cold water immersion therapy safety precautions in aquatic, fitness and leisure settings, 26 February 2024. RLSSA.
  5. Costello JT et al. Whole-body cryotherapy (extreme cold air exposure) for preventing and treating muscle soreness after exercise in adults. Cochrane, 2015. Cochrane.
  6. Legrand FD et al. Evaluating safety risks of whole-body cryotherapy/cryostimulation (WBC): a scoping review from an international consortium. European Journal of Medical Research, 2023. PMC.
  7. Contraindications to Whole-Body Cryostimulation (WBC). A position paper from the WBC Working Group of the International Institute of Refrigeration and the multidisciplinary expert panel. Frontiers in Rehabilitation Sciences, 2025. Frontiers. Document by a working group of the International Institute of Refrigeration.
  8. Ferreira RM et al. Journal of Functional Morphology and Kinesiology. The Effects of Massage Guns on Performance and Recovery: A Systematic Review, 2023. PMC.
  9. Zhu Y et al. Effects of percussive therapy dosages on recovery from acute exercise-induced muscle damage: a systematic review and meta-analysis. Chiropractic & Manual Therapies, 12 June 2026. Springer.
  10. Wiewelhove T et al. A Meta-Analysis of the Effects of Foam Rolling on Performance and Recovery. Frontiers in Physiology, 2019. PMC.
  11. Percussive Massage Device Consumer Safety Risks: A Critically Appraised Topic. Journal of Fitness, Wellness, and Human Performance, 2025. DOI.
  12. Pan H et al. Rhabdomyolysis After the Use of Percussion Massage Gun: A Case Report. Physical Therapy, 2020. PMC.
  13. Raedy A et al. Traumatic Vertebral Artery Dissection from Repetitive and Prolonged Use of a Handheld Massage Gun. Neurology, 2024 (conference abstract). Neurology.
  14. Dubois B, Esculier JF. Soft-tissue injuries simply need PEACE and LOVE. British Journal of Sports Medicine, 2020;54:72-73 (editorial). BJSM.

For compression, manual massage, stretching, cool-down and heat see the second guide.

Sources consulted on 31 October 2026. No WOLF LAB tests, no brands or models. General information, not medical advice or a treatment indication.

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