Evidence map›Paper›PMID 27973384›Full record

ArticleJournal of musculoskeletal & neuronal interactions2016

Effects of fatiguing constant versus alternating intensity intermittent isometric muscle actions on maximal torque and neuromuscular responses.

C M Smith, T J Housh, E C Hill, K C Cochrane, N D M Jenkins, R J Schmidt, G O Johnson

Abstract read
In one paragraph

Article in Journal of musculoskeletal & neuronal interactions, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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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

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3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
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4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

7 authors.

C M SmithDepartment of Nutrition and Health Sciences Human Performance Laboratory, University of Nebraska-Lincoln, Lincoln, NE 68505, United States.
T J Housh
E C Hill
K C Cochrane
N D M Jenkins
R J Schmidt
G O Johnson

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo determine the effects of constant versus alternating applications of torque during fatiguing, intermittent isometric muscle actions of the leg extensors on maximal voluntary isometric contraction (MVIC) torque and neuromuscular responses.

methodsSixteen subjects performed two protocols, each consisting of 50 intermittent isometric muscle actions of the leg extensors with equal average load at a constant 60% MVIC or alternating 40 then 80% (40/80%) MVIC with a work-to-rest ratio of 6-s on and 2-s off. MVIC torque as well as electromyographic signals from the vastus lateralis (VL), vastus medialis (VM), and rectus femoris (RF) and mechanomyographic signals from the VL were recorded pretest, immediately posttest, and 5-min posttest.

resultsThe results indicated that there were no time-related differences between the 60% MVIC and 40/80% MVIC protocols. The MVIC torque decreased posttest (22 to 26%) and remained depressed 5-min posttest (9%). There were decreases in electromyographic frequency (14 to 19%) and mechanomyographic frequency (23 to 24%) posttest that returned to pretest levels 5-min posttest. There were no changes in electromyographic amplitude and mechanomyogrpahic amplitude.

conclusionsThese findings suggested that these neuromuscular parameters did not track the fatigue-induced changes in MVIC torque after 5-min of recovery.

Indexed as

ElectrophysiologyFemaleHumansIsometric ContractionMaleMuscle FatigueMuscle, SkeletalTorqueYoung Adult

Identifiers

PMID27973384
PMCPMC5259573

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