Cold-water immersion aids power and soreness recovery after hard exercise, but not strength

A 2022 systematic review and meta-analysis pooled 52 peer-reviewed studies to compare cold-water immersion against passive rest for recovery in physically active people after a single strenuous exercise session. Across multiple outcomes, cold-water immersion was associated with modest improvements in muscular power, perceived soreness, and feelings of recovery at the 24-hour mark, though strength recovery showed no significant benefit.

What the study found

Cold-water immersion was associated with a small but statistically significant improvement in muscular power recovery 24 hours after both eccentric and high-intensity exercise, with standardised mean differences in the small-to-moderate range. It did not, however, produce a meaningful benefit for muscular strength recovery under either exercise condition — a distinction the authors highlight as important, since power and strength are separate physical qualities.

After high-intensity exercise specifically, cold-water immersion was also associated with reduced blood levels of creatine kinase — a marker of muscle damage — as well as lower perceived muscle soreness and better self-reported feelings of recovery at 24 hours. These perceptual benefits were among the larger effects observed in the analysis.

Meta-regression analyses, which examined whether the amount of cold exposure influenced outcomes, suggested that shorter immersion durations and lower water temperatures were linked to the greatest reductions in creatine kinase and the largest gains in endurance performance after high-intensity exercise. The authors interpret this as a possible dose-response relationship, though they caution that the evidence base for this pattern is less robust than for the primary outcomes.

For eccentric exercise — the type that typically causes delayed-onset muscle soreness — the picture was more limited: cold-water immersion appeared beneficial only for muscular power, with no significant effects detected for soreness, perceived recovery, strength, or creatine kinase in that subgroup.

Limits worth knowing

The 52 included studies varied considerably in participant characteristics, exercise protocols, and immersion conditions, contributing to high heterogeneity in several analyses. All participants were described as physically active or sport-involved, so findings may not extend to sedentary individuals or elite athletes at the extremes of the fitness spectrum. Most individual studies were short-term, capturing recovery over hours to a few days rather than across training seasons. The meta-regression findings on dose-response should be treated cautiously, as they are observational comparisons across studies rather than controlled experiments. Funding for the lead author came from an Australian government research training scholarship; no industry conflicts were disclosed.

About this entry. The Heartwood Review summarizes published, peer-reviewed research in its own words and links to the original source. It is not medical advice; consult a physician before beginning or changing any thermal or recovery practice. Findings summarized here describe the study cited, not any product sold by Teak & Marble Atelier. Corrections.