Cold and hot water immersion are not more effective than placebo for the recovery of physical performance

Key points

1. 01Randomized controlled trial comparing cold-water immersion, hot-water immersion, and a placebo sham in national-level soccer players.
2. 02Outcomes covered physical performance recovery, perceptual recovery, and training adaptations across a season block.
3. 03No meaningful superiority of cold or hot immersion over placebo was found for performance recovery or adaptations.
4. 04Authors suggest water immersion benefits may be largely placebo or contextual.
5. 05Teams should weigh the evidence and the logistics when setting recovery policy.

How it was conducted

Design

Randomized controlled trial conducted over a season block

Participants

National-level soccer players

Groups

Cold-water immersion, hot-water immersion, and placebo sham

Outcomes

Physical performance recovery, perceptual recovery, and training load and adaptation measures

What they found

• No meaningful superiority of cold-water immersion over placebo for performance recovery or training adaptations.
• No meaningful superiority of hot-water immersion over placebo for performance recovery or training adaptations.
• Findings point to water immersion benefits being largely placebo or contextual.

Limitations

• The available text reports only directional conclusions and does not provide the exact effect sizes, confidence intervals, or sample size needed to gauge precision.
• Conducted in national-level soccer players, so results may not transfer to other sports, recreational athletes, or different recovery contexts.
• A null finding can reflect limited statistical power rather than true absence of an effect.

Why it matters

For patients

Athletes who use ice baths or hot baths mainly to bounce back faster may be feeling a placebo effect rather than a real physical recovery boost.

For clinicians

Practitioners can question routine prescription of water immersion for recovery and weigh its real benefit against time, cost, and logistics.

For readers

This trial adds to growing doubt that cold-water or hot-water immersion outperforms a convincing sham for athletic recovery.