Evidence map›Paper›PMID 40514198›Full record

Trial reportBritish journal of sports medicine2025

Thermoregulation and dehydration in children and youth exercising in extreme heat compared with adults.

James W Smallcombe, Thomas H Topham, Harry A Brown, Megan Tiong, Brad Clark, Carolyn Broderick, Samuel Chalmers, John Orchard, Yorgi Mavros, Julien D Périard and 1 more

Abstract readComparative StudyRandomized Controlled Trial
In one paragraph

Trial report in British journal of sports medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
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

9 citing papers in PubMed.

  1. Article
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  5. Article
  6. Article
  7. Tennis in the heat: a panel discussion.South African journal of sports medicine · 2026
    Article
  8. Article
  9. Review
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

11 authors.

James W SmallcombeHeat and Health Research Centre, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.
Thomas H TophamUniversity of Canberra Research Institute for Sport and Exercise, Bruce, Australian Capital Territory, Australia.
Harry A BrownUniversity of Canberra Research Institute for Sport and Exercise, Bruce, Australian Capital Territory, Australia.ORCID http://orcid.org/0000-0003-3433-5151
Megan TiongHeat and Health Research Centre, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.
Brad ClarkFaculty of Health, University of Canberra Research Institute for Sport and Exercise, Bruce, Australian Capital Territory, Australia.
Carolyn BroderickHeat and Health Research Centre, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.
Samuel ChalmersUniversity of South Australia, Adelaide, South Australia, Australia.
John OrchardUniversity of Sydney, Sydney, New South Wales, Australia.
Yorgi MavrosHeat and Health Research Centre, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.
Julien D PériardUniversity of Canberra, Canberra, Australian Capital Territory, Australia.ORCID http://orcid.org/0000-0002-6266-4246
Ollie JayHeat and Health Research Centre, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia ollie.jay@sydney.edu.au.ORCID http://orcid.org/0000-0002-6076-6337

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo compare hyperthermia and physiological dehydration risk during exercise heat stress between children of different ages and adults and evaluate an existing adult sweat rate calculator in children.

methods68 fit and recreationally active children aged 10-16 years (31 girls), and 24 adults aged 18-40 years (11 females) completed three separate 45 min treadmill walking/running trials at different intensities on different days at 30°C, 40% relative humidity (RH) (WARM) or 40°C, 30% RH (HOT). Exposures were randomised to elicit intensities scaled to (1) fitness, (2) mass and (3) surface area. Core (gastrointestinal (T

resultsExcept for 60% V̇O

conclusionsUsing the most comprehensive paediatric exercise heat stress dataset from a single study to date, we show that children aged 10-16 years are at a similar risk of hyperthermia and dehydration as adults during exercise up to 40°C. This supports recent changes to paediatric sport heat policies that were based on limited data. Practitioners can potentially reduce behavioural dehydration risks from inadequate fluid consumption using an existing adult sweat rate calculator for children.

Indexed as

Body Temperature RegulationDehydrationExerciseHot TemperatureAdolescentAdultAge FactorsChildExercise TestFemaleHumansHyperthermiaMaleSweatingYoung AdultChildrenDehydrationExerciseSweat

Identifiers

PMID40514198
PMCPMC12320596

What OpenQuestion holds

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LicenceCC BY-NC
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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.