Evidence map›Paper›PMID 32788718›Full record

SynthesisScientific reports2020

Menthol can be safely applied to improve thermal perception during physical exercise: a meta-analysis of randomized controlled trials.

Patrik Keringer, Nelli Farkas, Noemi Gede, Peter Hegyi, Zoltan Rumbus, Zsolt Lohinai, Margit Solymar, Kasidid Ruksakiet, Gabor Varga, Andras Garami

Open access · goldAbstract readMeta-Analysis
In one paragraph

Synthesis in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 5 pooled it
1.3field-weighted citation impact, top 20% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

10 citing papers in PubMed, 5 syntheses or guidelines pooled it, 18 citations in OpenAlex.

  1. Pooled it
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  6. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 2 institutions in 1 country.

Patrik KeringerDepartment of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, 7624, Pecs, Hungary.
Nelli FarkasInstitute for Translational Medicine, Szentagothai Research Centre, Medical School, University of Pecs, 7624, Pecs, Hungary.
Noemi GedeInstitute for Translational Medicine, Szentagothai Research Centre, Medical School, University of Pecs, 7624, Pecs, Hungary.
Peter HegyiInstitute for Translational Medicine, Szentagothai Research Centre, Medical School, University of Pecs, 7624, Pecs, Hungary.
Zoltan RumbusDepartment of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, 7624, Pecs, Hungary.
Zsolt LohinaiDepartment of Conservative Dentistry, Faculty of Dentistry, Semmelweis University, 1088, Budapest, Hungary.
Margit SolymarDepartment of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, 7624, Pecs, Hungary.
Kasidid RuksakietDepartment of Conservative Dentistry, Faculty of Dentistry, Semmelweis University, 1088, Budapest, Hungary.
Gabor VargaDepartment of Oral Biology, Faculty of Dentistry, Semmelweis University, 1089, Budapest, Hungary.
Andras GaramiDepartment of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, 7624, Pecs, Hungary. andras.garami@aok.pte.hu.
University of Pecs · HUSemmelweis University · HU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Menthol is often used as a cold-mimicking substance to allegedly enhance performance during physical activity, however menthol-induced activation of cold-defence responses during exercise can intensify heat accumulation in the body. This meta-analysis aimed at studying the effects of menthol on thermal perception and thermophysiological homeostasis during exercise. PubMed, EMBASE, Cochrane Library, and Google Scholar databases were searched until May 2020. Menthol caused cooler thermal sensation by weighted mean difference (WMD) of - 1.65 (95% CI, - 2.96 to - 0.33) and tended to improve thermal comfort (WMD = 1.42; 95% CI, - 0.13 to 2.96) during physical exercise. However, there was no meaningful difference in sweat production (WMD = - 24.10 ml; 95% CI, - 139.59 to 91.39 ml), deep body temperature (WMD = 0.02 °C; 95% CI, - 0.11 to 0.15 °C), and heart rate (WMD = 2.67 bpm; 95% CI - 0.74 to 6.09 bpm) between the treatment groups. Menthol improved the performance time in certain subgroups, which are discussed. Our findings suggest that different factors, viz., external application, warmer environment, and higher body mass index can improve menthol's effects on endurance performance, however menthol does not compromise warmth-defence responses during exercise, thus it can be safely applied by athletes from the thermoregulation point of view.

Indexed as

ExerciseAntipruriticsBody Temperature RegulationHumansMentholPatient SafetyRandomized Controlled Trials as TopicAntipruriticsMenthol

Identifiers

PMID32788718
PMCPMC7423903
OpenAlexW3048440491

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.