Evidence map›Paper›PMID 28391392›Full record

ArticleEuropean journal of applied physiology2017

Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings.

T G Balshaw, A Fry, T M Maden-Wilkinson, P W Kong, J P Folland

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In one paragraph

Article in European journal of applied physiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing 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

14 citing papers in PubMed.

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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

5 authors.

T G BalshawSchool of Sport, Exercise, and Health Sciences, Loughborough University, Leicestershire, LE11 3TU, UK. t.g.balshaw@lboro.ac.uk.
A FrySchool of Sport, Exercise, and Health Sciences, Loughborough University, Leicestershire, LE11 3TU, UK.
T M Maden-WilkinsonSchool of Sport, Exercise, and Health Sciences, Loughborough University, Leicestershire, LE11 3TU, UK.
P W KongInstitute for Sports Research, Nanyang Technological University, Singapore, Singapore.
J P FollandSchool of Sport, Exercise, and Health Sciences, Loughborough University, Leicestershire, LE11 3TU, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe reliability of surface electromyography (sEMG) is typically modest even with rigorous methods, and therefore further improvements in sEMG reliability are desirable. This study compared the between-session reliability (both within participant absolute reliability and between-participant relative reliability) of sEMG amplitude from single vs. average of two distinct recording sites, for individual muscle (IM) and whole quadriceps (WQ) measures during voluntary and evoked contractions.

methodsHealthy males (n = 20) performed unilateral isometric knee extension contractions: voluntary maximum and submaximum (60%), as well as evoked twitch contractions on two separate days. sEMG was recorded from two distinct sites on each superficial quadriceps muscle.

resultsAveraging two recording sites vs. using single site measures improved reliability for IM and WQ measurements during voluntary (16-26% reduction in within-participant coefficient of variation, CV

conclusionsFor sEMG measurements from large muscles, averaging the recording of two distinct sites is recommended as it improves within-participant reliability. This improved sensitivity has application to clinical and research measurement of sEMG amplitude.

Indexed as

Muscle ContractionAdultElectromyographyHumansMaleQuadriceps MuscleCoefficient of variationEvoked muscle responseIntraclass correlation coefficientKnee extensionPeripheral nerve stimulationVoluntary muscle contraction

Identifiers

PMID28391392
PMCPMC5427161

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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.