Cold Immersion Is Even More Worthless Than We Thought? (New Study)

TL;DR

A 2025 meta-analysis of 30 RCTs finds cold water immersion doesn't meaningfully restore strength or performance, ending its recovery justification.

Key Points

• 1.Cold water immersion's main claimed benefit is reducing post-exercise inflammation. Proponents argue it prevents soreness and stiffness, especially useful for athletes competing in back-to-back games within tournaments.
• 2.The already-established downside is reduced muscle growth. Cold immersion within ~1 hour post-training measurably reduces hypertrophy stimulus — not eliminates it, but reduces it — across multiple prior studies.
• 3.A major new 2025 meta-analysis of 30 randomized controlled trials with 527 participants tested cold immersion's performance recovery claims. Protocols ranged from 5–20°C water temperatures and 6–25 minute durations, covering sports including rugby, basketball, jiu-jitsu, and half marathons.
• 4.The meta-analysis found cold immersion does not meaningfully restore strength or jump performance. While subjects reported feeling less sore, the creatine kinase (muscle damage marker) reduction largely disappeared after publication bias correction.
• 5.Partial or lower-body-only immersion performed about as well as whole-body immersion — which, as Dr. Mike notes, means equally ineffective since neither produced meaningful performance recovery.
• 6.Dr. Mike declares the era of cold immersion as a performance recovery tool officially over. Key limitations: the study was almost exclusively male participants, and findings don't directly cover local icing or cryo chambers, though the cold mechanism is the same.