Evidence map›Paper›PMID 33109241›Full record

ArticleBiology of sex differences2020

Sex differences in fatigability after ischemic preconditioning of non-exercising limbs.

Hugo M Pereira, Felipe F de Lima, Bruno M Silva, André F Kohn

Open access · goldAbstract read
In one paragraph

Article in Biology of sex differences, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.3field-weighted citation impact, top 19% 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

11 citing papers in PubMed, 21 citations in OpenAlex.

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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

4 authors at 3 institutions in 2 countries.

Hugo M PereiraDepartment of Health and Exercise Science, University of Oklahoma, 1401 Asp Ave, Norman, OK, 73019, USA. hugomax@ou.edu.ORCID 0000-0003-4373-7005
Felipe F de LimaBiomedical Engineering Laboratory/EPUSP, University of São Paulo, São Paulo, SP, Brazil.
Bruno M SilvaDepartment of Physiology, Federal University of São Paulo, São Paulo, SP, Brazil.
André F KohnBiomedical Engineering Laboratory/EPUSP, University of São Paulo, São Paulo, SP, Brazil.
Universidade de São Paulo · BRUniversidade Federal de São Paulo · BRUniversity of Oklahoma · US

Funding

Conselho Nacional de Desenvolvimento Científico e Tecnológico 303809/2016-7Fundação de Amparo à Pesquisa do Estado de São Paulo 2011/17193-0Fundação de Amparo à Pesquisa do Estado de São Paulo 2015/12730-9
6 · The paper itself

Abstract

backgroundIschemic preconditioning (IPC) is suggested to decrease fatigability in some individuals but not others. Sex differences in response to IPC may account for this variability and few studies systematically investigated the effects of IPC in men and women. The goal of this study was to determine if time to task failure, perception of pain, and neuromuscular mechanisms of fatigability were altered by IPC in men and women.

methodsTen women (29 ± 5 years old) and 10 men (28 ± 6 years old) performed isometric contractions with the plantar flexor muscles of the dominant leg at 20% of maximal voluntary contraction until task failure. We used a repeated measures design where each individual performed 3 randomized and counterbalanced test sessions: (A) IPC session, cuff inflation and deflation (5 min each repeated 3 times) performed before the exercise by inflating cuffs to the non-dominant leg and arm; (B) sham session, cuffs were inflated for a short period (1 min); and (C) control session, no cuffs were involved.

resultsCompared with control, IPC increased time to task failure in men (mean difference, 5 min; confidence interval (CI) of mean difference, 2.2; 7.8 min; P = 0.01) but not women (mean difference, - 0.6 min; CI of mean difference, - 3.5; 2.4 min; P = 0.51). In men, but not women, the IPC-induced increase in time to task failure was associated with lower response to pressure pain (r = - 0.79). IPC further exposed sex differences in arterial pressure during fatiguing contractions (session × sex: P < 0.05). Voluntary activation, estimated with the twitch interpolation technique, and presynaptic inhibition of leg Ia afferents were not altered after IPC for men and women. The tested variables were not altered with sham.

conclusionsThe ergogenic effect of IPC on time to task failure was observed only in men and it was associated with reductions in the perception of pain. This pilot data suggest the previously reported inter-individual variability in exercise-induced fatigability after IPC could be a consequence of the sex and individual response to pain.

Indexed as

Ischemic PreconditioningAdultBlood PressureFemaleHumansMaleMuscle FatiguePainSex FactorsYoung AdultGender differencesIschemic conditioningPainPlantar flexor musclesTime to task failure

Identifiers

PMID33109241
PMCPMC7590792
OpenAlexW3097969181

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.