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Does cold water immersion reduce soreness or blunt muscle growth?

Cold water immersion eases delayed muscle soreness after hard training, but regular ice baths after lifting blunt long-term muscle growth and strength.

Published October 2026

Short answer

Ice baths reduce delayed muscle soreness over 24 to 96 hours. But using them regularly after lifting blunts muscle protein synthesis, satellite cell activity, and long-term gains in muscle size and strength. Evidence grade B (Moderate). Systematic reviews and randomised trials confirm both effects; downgraded for unblinded soreness trials and small samples in lifting studies.

Key takeaways

  • Systematic reviews of randomised trials show cold water immersion at 10°C to 15°C for 10 to 15 minutes reduces muscle soreness across 24 to 96 hours post-exercise [1] [2].
  • A meta-analysis found regular cold water immersion after strength workouts significantly impairs long-term maximal strength, isometric strength, and ballistic power gains [3].
  • Controlled trials show cold water immersion after lifting blunts muscle fiber hypertrophy by suppressing muscle protein synthesis and satellite cell activity [4] [5] [6].
  • Cold immersion reduces muscle blood flow and postprandial amino acid incorporation into muscle tissue after exercise [7].

The short version

Plunging into cold water after strenuous training helps ease delayed-onset muscle soreness over the next one to four days [1] [2]. However, systematic reviews and controlled trials show that taking regular ice baths immediately after resistance training blunts long-term muscle growth and strength adaptations [4] [3]. For athletes needing rapid recovery between close competitions, Cold Water Immersion provides useful symptom relief, but lifters aiming to build muscle mass should keep cold water away from post-workout recovery [8].

What the studies show

A Cochrane systematic review of 17 randomised and quasi-randomised trials involving 366 participants found that cold water immersion significantly lowered delayed-onset muscle soreness compared with passive rest at 24 hours (standardised mean difference -0.55), 48 hours (SMD -0.66), 72 hours (SMD -0.93), and 96 hours (SMD -0.58) post-exercise [1]. A subsequent meta-analysis pooling 27 studies confirmed significant reductions in muscle soreness symptoms at 24 hours (Hedges' g -0.75), 48 hours (Hedges' g -0.73), and 96 hours (Hedges' g -0.71) [2]. Another meta-analysis of 32 trials similarly reported reduced muscle soreness within 24 hours (SMD -0.48), though cold water showed no clear effect on soreness beyond 24 hours in that dataset [9].

While cold water immersion temporarily numbs soreness, chronic application after resistance exercise impairs muscle adaptations [3] [8]. A systematic review and meta-analysis of eight controlled studies showed that regular post-exercise cold water immersion had a harmful effect on one-repetition maximum, maximal isometric strength, and strength endurance (pooled SMD -0.60), as well as ballistic performance (SMD -0.61) [3]. In a 12-week trial of 21 physically active men lifting weights twice weekly, active recovery produced a 17% increase in type II muscle fibre cross-sectional area and a 19% gain in isokinetic work, whereas cold water immersion (10 minutes at 10°C) completely suppressed these gains [4]. A 7-week training study in 16 men confirmed that cold water immersion (15 minutes at 10°C) blunted type II muscle fiber hypertrophy compared with passive rest (-1,959 µm² difference), while diminishing mTORC1 signaling and elevating the protein degradation marker FoxO1 [5].

Tracer studies help explain why cold baths hinder hypertrophy [6] [7]. In a randomized crossover study of 12 men, immersing a leg in cold water (8°C for 20 minutes) after lifting lowered hourly myofibrillar protein synthesis rates over 5 hours (0.058% vs 0.072% per hour) and lowered daily myofibrillar protein synthesis over two weeks of training (1.48% vs 1.67% per day) [6]. Cooling also reduced muscle microvascular blood volume by more than half and blunted the incorporation of ingested amino acids into muscle tissue [7]. Furthermore, cold immersion failed to lower muscle inflammation or cellular stress markers compared with light active recovery, showing that cold does not uniquely reduce exercise-induced inflammation [10].

The nuances

The trade-off depends on your primary athletic goal [8]. During multi-game tournaments, multi-day endurance events, or intense competitive phases where immediate performance recovery matters more than long-term muscle building, cold water immersion can preserve power and reduce perceived fatigue [PMID 36744038] [8]. By contrast, in training blocks focused on hypertrophy or maximal strength, post-exercise chilling works directly against the inflammatory and anabolic signals that stimulate muscle remodeling [4] [5].

Water temperature and timing also alter the response [8]. Effective recovery protocols in the literature typically use temperatures between 10°C and 15°C for 10 to 15 minutes [1] [8]. Applying cold water immediately after lifting causes the greatest suppression of blood flow and protein synthesis; waiting several hours or using cold on non-lifting days has not shown the same interference with muscle gains [6] [8].

What this means for you

If you lift weights to build muscle or strength, avoid cold water immersion immediately following your workouts [4] [3]. Instead, support recovery with adequate protein intake, quality sleep, and light active cool-downs such as walking or easy cycling [10] [6].

If you compete in endurance sports, field sports, or multi-day athletic events where you need to perform again within 24 to 48 hours, a 10- to 15-minute soak at 10°C to 15°C can help relieve soreness and perceived fatigue [1] [8].

Anyone with cardiovascular disease, uncontrolled high blood pressure, or peripheral vascular conditions should speak with a healthcare provider before trying cold water immersion due to the sudden spike in heart rate and blood pressure caused by cold exposure [PMID 22547634] [PMID 38211547]. See the Cold Water Immersion topic page for complete safety details.

Go deeper

  • Cold Water Immersion — Cold water immersion eases delayed-onset muscle soreness and perceived fatigue over 24 to 96 hours after strenuous exercise.

References

  1. Cold-water immersion (cryotherapy) for preventing and treating muscle soreness after exercise.. Cochrane Database Syst Rev, 2012.
  2. The Effect of Post-Exercise Cryotherapy on Recovery Characteristics: A Systematic Review and Meta-Analysis.. PLoS One, 2015.
  3. The Effects of Regular Cold-Water Immersion Use on Training-Induced Changes in Strength and Endurance Performance: A Systematic Review with Meta-Analysis.. Sports Med, 2021.
  4. Post-exercise cold water immersion attenuates acute anabolic signalling and long-term adaptations in muscle to strength training.. J Physiol, 2015.
  5. Cold water immersion attenuates anabolic signaling and skeletal muscle fiber hypertrophy, but not strength gain, following whole-body resistance training.. J Appl Physiol (1985), 2019.
  6. Postexercise cooling impairs muscle protein synthesis rates in recreational athletes.. J Physiol, 2020.
  7. Postexercise Cooling Lowers Skeletal Muscle Microvascular Perfusion and Blunts Amino Acid Incorporation into Muscle Tissue in Active Young Adults.. Med Sci Sports Exerc, 2025.
  8. 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 Med Open, 2026.
  9. Heat and cold therapy reduce pain in patients with delayed onset muscle soreness: A systematic review and meta-analysis of 32 randomized controlled trials.. Phys Ther Sport, 2021.
  10. The effects of cold water immersion and active recovery on inflammation and cell stress responses in human skeletal muscle after resistance exercise.. J Physiol, 2017.