Evidence map›Paper›PMID 30151687›Full record

ArticleEuropean journal of applied physiology2018

Neuromuscular responses of recreationally active women during a sustained, submaximal isometric leg extension muscle action at a constant perception of effort.

Joshua L Keller, Terry J Housh, Ethan C Hill, Cory M Smith, Richard J Schmidt, Glen O Johnson

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Article in European journal of applied physiology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
0.8field-weighted citation impact, top 30% 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

6 citing papers in PubMed, 22 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

6 authors at 1 institution in 1 country.

Joshua L KellerDepartment of Nutrition and Health Sciences, Human Performance Laboratory, 110 Ruth Leverton Hall, University of Nebraska-Lincoln, Lincoln, NE, 68583-0806, USA. jkeller@unl.edu.
Terry J HoushDepartment of Nutrition and Health Sciences, Human Performance Laboratory, 110 Ruth Leverton Hall, University of Nebraska-Lincoln, Lincoln, NE, 68583-0806, USA.
Ethan C HillDepartment of Nutrition and Health Sciences, Human Performance Laboratory, 110 Ruth Leverton Hall, University of Nebraska-Lincoln, Lincoln, NE, 68583-0806, USA.
Cory M SmithDepartment of Nutrition and Health Sciences, Human Performance Laboratory, 110 Ruth Leverton Hall, University of Nebraska-Lincoln, Lincoln, NE, 68583-0806, USA.
Richard J SchmidtDepartment of Nutrition and Health Sciences, Human Performance Laboratory, 110 Ruth Leverton Hall, University of Nebraska-Lincoln, Lincoln, NE, 68583-0806, USA.
Glen O JohnsonDepartment of Nutrition and Health Sciences, Human Performance Laboratory, 110 Ruth Leverton Hall, University of Nebraska-Lincoln, Lincoln, NE, 68583-0806, USA.
University of Nebraska–Lincoln · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe purpose of the present study was to examine the fatigue-related patterns of responses for electromyography (EMG), mechanomyography (MMG), and force during a sustained, submaximal isometric leg extension muscle action anchored at RPE = 5.

methodsTen women (23.1 ± 2.3 year) performed two, maximal voluntary isometric contractions (MVIC) prior to and following an isometric muscle action that was sustained at RPE = 5 (OMNI-RES) for a maximal time-limit of 5 min or until RPE = 5 could not be maintained (actual time-limit). EMG amplitude (AMP), EMG mean power frequency (MPF), MMG AMP, MMG MPF, and force values were determined every 5% of the actual or maximal time-limit. Regression analyses were used to examine the neuromuscular parameters and force vs. time relationships.

resultsThe pretest MVIC (46.9 ± 8.9 kg) was significantly (p = 0.003; d = 1.8) greater than posttest (36.4 ± 5.3 kg) MVIC. The actual time-limit was 180 ± 90.9 s (range 84.8-300 s). The percent decline in force production during the sustained isometric muscle action was 34.7 ± 17.1%, and there was a significant negative, quadratic force vs. time relationship (p < 0.001; R = - 0.983). There was a significant positive, quadratic MMG AMP vs. time relationship (p < 0.001; R = 0.852), but no significant (p > 0.05) relationships for EMG AMP, EMG MPF, or MMG MPF vs. time.

conclusionsThe current findings indicated that it was necessary to reduce force to maintain RPE = 5. The neuromuscular and force responses supported the RPE clamp model and suggested that force was initially regulated by anticipatory feedforward mechanisms and then altered by afferent feedback.

Indexed as

Isometric ContractionPerceptionAdultFemaleHumansLegMuscle, SkeletalPhysical ExertionElectromyographyFatigueMechanomyographyRatings of perceived exertionResistance trainingRPE clamp

Identifiers

PMID30151687
OpenAlexW2889380226

What OpenQuestion holds

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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.