Evidence map›Paper›PMID 21616932›Full record

SynthesisPhysical therapy2011

Age-related differences in muscle fatigue vary by contraction type: a meta-analysis.

Keith G Avin, Laura A Frey Law

Open access · bronzeAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Physical therapy, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 4 pooled it
6.9field-weighted citation impact, top 3% 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

42 citing papers in PubMed, 4 syntheses or guidelines pooled it, 96 citations in OpenAlex.

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  16. Muscle Performance Changes with Age in Active Women.International journal of environmental research and public health · 2021
    Article
  17. Maximum isometric tongue force in patients with obstructive sleep apnoea.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2021
    Article
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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

2 authors at 1 institution in 1 country.

Keith G AvinGraduate Program in Physical Therapy & Rehabilitation Science, The University of Iowa, Iowa City, Iowa 52242-1190, USA.
Laura A Frey Law
University of Iowa · US

Funding

Genetic and Trait Influences on Pain HeterogeneityK01AR056134 · NIAMS · UNIVERSITY OF IOWA · PI FREY LAW, LAURA A · 2009 to 2013
$587k
Assessing 3D Trunk Strength as a Function of Position and VelocityF31AR056175 · NIAMS · UNIVERSITY OF IOWA · PI AVIN, KEITH G · 2008 to 2011
$120k
NIAMS NIH HHS 1 F31 AR056175NIAMS NIH HHS F31 AR056175NIAMS NIH HHS K01 AR056134NIAMS NIH HHS K01AR056134
6 · The paper itself

Abstract

backgroundDuring senescence, despite the loss of strength (force-generating capability) associated with sarcopenia, muscle endurance may improve for isometric contractions. PURPOSE: The purpose of this study was to perform a systematic meta-analysis of young versus older adults, considering likely moderators (ie, contraction type, joint, sex, activity level, and task intensity). DATA SOURCES: A 2-stage systematic review identified potential studies from PubMed, CINAHL, PEDro, EBSCOhost: ERIC, EBSCOhost: Sportdiscus, and The Cochrane Library. STUDY SELECTION: Studies reporting fatigue tasks (voluntary activation) performed at a relative intensity in both young (18-45 years of age) and old (≥ 55 years of age) adults who were healthy were considered. DATA EXTRACTION: Sample size, mean and variance outcome data (ie, fatigue index or endurance time), joint, contraction type, task intensity (percentage of maximum), sex, and activity levels were extracted. DATA SYNTHESIS: Effect sizes were (1) computed for all data points; (2) subgrouped by contraction type, sex, joint or muscle group, intensity, or activity level; and (3) further subgrouped between contraction type and the remaining moderators. Out of 3,457 potential studies, 46 publications (with 78 distinct effect size data points) met all inclusion criteria. LIMITATIONS: A lack of available data limited subgroup analyses (ie, sex, intensity, joint), as did a disproportionate spread of data (most intensities ≥ 50% of maximum voluntary contraction).

conclusionsOverall, older adults were able to sustain relative-intensity tasks significantly longer or with less force decay than younger adults (effect size=0.49). However, this age-related difference was present only for sustained and intermittent isometric contractions, whereas this age-related advantage was lost for dynamic tasks. When controlling for contraction type, the additional modifiers played minor roles. Identifying muscle endurance capabilities in the older adult may provide an avenue to improve functional capabilities, despite a clearly established decrement in peak torque.

Indexed as

Age FactorsAgingFemaleHumansMaleMuscle ContractionMuscle FatigueMuscle, SkeletalPhysical EnduranceSex Factors

Identifiers

PMID21616932
PMCPMC3145894
OpenAlexW2101635748

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.