Evidence map›Paper›PMID 25505030›Full record

ArticleJournal of applied physiology (Bethesda, Md. : 1985)2015

Aging impairs heat loss, but when does it matter?

Jill M Stapleton, Martin P Poirier, Andreas D Flouris, Pierre Boulay, Ronald J Sigal, Janine Malcolm, Glen P Kenny

Open access · greenAbstract read
In one paragraph

Article in Journal of applied physiology (Bethesda, Md. : 1985), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed
4.2field-weighted citation impact, top 5% 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

43 citing papers in PubMed, 113 citations in OpenAlex.

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  18. Heat Strain Evaluation of Power Grid Outdoor Workers Based on a Human Bioheat Model.International journal of environmental research and public health · 2022
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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

7 authors at 5 institutions in 2 countries.

Jill M StapletonHuman and Environmental Physiology Research Unit, University of Ottawa, Ottawa, Canada;
Martin P PoirierHuman and Environmental Physiology Research Unit, University of Ottawa, Ottawa, Canada;
Andreas D FlourisFAME Laboratory, Department of Exercise Science, University of Thessaly, Trikala, Greece;
Pierre BoulayFaculty of Physical Education and Sports, University of Sherbrooke, Sherbrooke, Canada;
Ronald J SigalDepartments of Medicine, Cardiac Sciences and Community Health Sciences, Faculties of Medicine and Kinesiology, University of Calgary, Calgary, Canada; and.
Janine MalcolmDivision of Endocrinology and Metabolism, Ottawa Hospital-Riverside Campus, Ottawa, Canada.
Glen P KennyHuman and Environmental Physiology Research Unit, University of Ottawa, Ottawa, Canada; gkenny@uottawa.ca.
University of Ottawa · CAOttawa Hospital · CAUniversité de Sherbrooke · CAUniversity of Calgary · CAUniversity of Thessaly · GR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Aging is associated with an attenuated physiological ability to dissipate heat. However, it remains unclear if age-related impairments in heat dissipation only occur above a certain level of heat stress and whether this response is altered by aerobic fitness. Therefore, we examined changes in whole body evaporative heat loss (HE) as determined using whole body direct calorimetry in young (n = 10; 21 ± 1 yr), untrained middle-aged (n = 10; 48 ± 5 yr), and older (n = 10; 65 ± 3 yr) males matched for body surface area. We also studied a group of trained middle-aged males (n = 10; 49 ± 5 yr) matched for body surface area with all groups and for aerobic fitness with the young group. Participants performed intermittent aerobic exercise (30-min exercise bouts separated by 15-min rest) in the heat (40°C and 15% relative humidity) at progressively greater fixed rates of heat production equal to 300 (Ex1), 400 (Ex2), and 500 (Ex3) W. Results showed that HE was significantly lower in middle-aged untrained (Ex2: 426 ± 34; and Ex3: 497 ± 17 W) and older (Ex2: 424 ± 38; and Ex3: 485 ± 44 W) compared with young (Ex2: 472 ± 42; and Ex3: 558 ± 51 W) and middle-aged trained (474 ± 21; Ex3: 552 ± 23 W) males at the end of Ex2 and Ex3 (P < 0.05). No differences among groups were observed during recovery. We conclude that impairments in HE in older and middle-aged untrained males occur at exercise-induced heat loads of ≥400 W when performed in a hot environment. These impairments in untrained middle-aged males can be minimized through regular aerobic exercise training.

Indexed as

AdultAgedAgingBody TemperatureBody Temperature RegulationCalorimetryExerciseHot TemperatureHumansMaleMiddle AgedThermogenesisYoung Adultaerobic fitnessagecalorimetryevaporative capacityskin blood flowsweating

Identifiers

PMID25505030
PMCPMC4312844
OpenAlexW2333328381

What OpenQuestion holds

Textmetadata
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.