Does cold water immersion blunt muscle growth?
What the studies we have published say — strongest evidence first. Every claim below links to the paper it came from.
An umbrella review spanning 15 meta-analyses and 161 studies finds post-exercise cold-water immersion speeds recovery of power, jump performance and soreness, but does not aid strength recovery and impairs strength and muscle growth gains when used routinely.
preliminary · human dataThe widest sweep of this evidence yet, covering 161 studies gathered through 15 earlier pooled reviews, and the pattern is consistent. The catch is that the authors rate the underlying evidence as low quality and inconsistent, so the exact sizes of these effects remain uncertain.
Pooled results from nine randomised trials found cold water immersion slightly better than passive recovery for muscle soreness, both immediately after exercise and days later. The pooled data suggested a dose-response pattern, with the best results at water temperatures of 11 to 15 °C and immersion times of 11 to 15 minutes.
well supported · human dataReasonably trustworthy but modest: results pooled from nine trials where people were assigned at random, all comparing cold water immersion with simply resting. The benefit for soreness was small, and with so few studies the ideal temperature and time are best treated as a signal rather than a settled recipe.
Pooling 22 randomised trials, a single cold-water immersion after exercise did nothing for maximal isometric strength recovery and transiently blunted jump performance immediately afterwards, while its apparent benefit for muscle-damage markers vanished once publication bias was accounted for. The one reasonably consistent effect was lower reported soreness.
well supported · human dataSystematic review and meta-analysis of 22 RCTs in healthy people comparing one cold-water immersion bout with passive rest; certainty was moderate at best for strength and very low for soreness, with substantial heterogeneity and publication bias affecting the creatine kinase result.
A meta-analysis of 13 randomised trials in 214 physically active people found cold water immersion relieved delayed onset muscle soreness better than body cryotherapy within 24 hours of strenuous exercise, while cryotherapy showed only a small and fragile edge in jump performance recovery at 24 hours. By 48 hours neither method held a significant advantage.
well supported · human dataFairly solid for the soreness result: it pools results from 13 trials of 214 active people, and those trials agreed with each other on soreness. They disagreed on jump performance, so cryotherapy's small edge there deserves little weight.
Cold water immersion aided recovery of jump and sprint performance 24 hours after team sport and reduced perceived fatigue at 72 hours in pooled data from 23 studies; neither cold water immersion nor contrast water therapy improved perceived muscle soreness.
well supported · human dataReasonable evidence for athletes: results pooled from 23 studies with 606 team sport players. The benefits were selective, with some performance and fatigue measures improving while perceived soreness did not, so it is not a blanket recovery fix.
Cold-water immersion done soon after resistance training can blunt muscle-growth (hypertrophy) adaptations, so it is best kept away from sessions where building muscle is the goal.
well supported · human data
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This page collects what our published, cited studies say; it is information, not medical advice. Have a different question? Ask it here.