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Pooled review (meta-analysis)

Pooled review of 32 trials: cold after exercise cut soreness within 24 hours

Wang and colleagues · Physical therapy in sport : official journal of the Association of Chartered Physiotherapists in Sports Medicine · 2021

Original title: Heat and cold therapy reduce pain in patients with delayed onset muscle soreness: A systematic review and meta-analysis of 32 randomized controlled trials.

Under review. A person has not yet checked this summary against the paper. It is written from the PubMed abstract. Until a person checks it, search engines are asked not to list this page.

What the study found

Points to benefit

Cold within 1 h of exercise cut soreness within 24 h (SMD -0.57). Cold water immersion alone: SMD -0.48. No clear effect after 24 h. Heat also cut soreness, with no clear difference from cold.

The study at a glance

Type of study
Pooled review (meta-analysis)
Who or what was studied
32 studies, 1,098 people · people with muscle soreness after exercise, in 32 trials
What was tested
Cold therapy (including cold water immersion) or heat therapy within 1 hour after exercise
What it measured
The question itself: muscle recovery, mood and immune health
Who has a stake
No stake declared
No competing interests declared.
Journal
Physical therapy in sport : official journal of the Association of Chartered Physiotherapists in Sports Medicine, 2021
Source
PubMed record 33493991. This page is based on the abstract only.

How much this study counts

  • ✓Pools the results of 32 studies with 1,098 people.
  • •A pooled review is only as strong as the studies it pools.
  • ✓Measured the question itself: muscle recovery, mood and immune health.
  • ✓No competing interests declared.
  • •Summarized from the PubMed abstract only. The full paper may hold details the abstract leaves out.

✓ Strength– Limit• Note

These points come from fixed rules about the type of study, its size and length, what it measured, and who has a stake. Every study on Digestery gets the same rules.

Where this study sits

This paper is not on the ladder. It is a pooled review (meta-analysis), and reviews and opinion pieces discuss studies that are already counted on the steps below.

↑ Stronger evidence

  1. Trials in people: muscle recovery and mood

    8

    1 benefit, 1 mixed, 5 no difference, 1 harm

  2. Trials in people: other measures

    8

    2 benefit, 1 mixed, 4 no difference, 1 harm

  3. Trials in people: lab tests or safety

    3

    1 benefit, 2 no difference

  4. Population studies

    3

    2 benefit, 1 mixed

  5. Blood levels and genes

    0

    None among the papers we read.

↓ Weaker evidence

  • Points to benefit
  • Mixed
  • No difference
  • No direction
  • Points to harm

How it fits with the other research

The short answer to “Does cold plunging help recovery and mood?”

Eases soreness a little; mood unproven.

Confidence: low. Based on 30 on-topic papers.

Read the full answer
  • Quoted in “What we found”: A review of 32 trials with 1098 people found cold water eased muscle soreness in the 24 hours after exercise, with no clear effect after that.
  • Part of the finding “Soreness eases, mostly in the first day”.

Other reviews on this question

See all 30 studies on this question

How this page was made

Label

First read of the abstract
Claude Sonnet
Independent second read
Claude Haiku
Differences settled
The two reads agreed on every checked field. Claude Opus 5.5.
Headline
Claude Sonnet, from the checked study record. A script checked its numbers and wording.
Numbers
Checked against the abstract by a script
“How much this study counts”
Fixed rules, the same for every study
Source check by a person
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