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Activity of periscapular muscles and its correlation with external oblique during push-up: Does scapular dyskinesis change the electromyographic response?

Authors
  • de Araújo, Rodrigo Cappatode1
  • Pirauá, André Luiz Torres2
  • Beltrão, Natália Barros3
  • Pitangui, Ana Carolina Rodarti1
  • 1 a Department of Physical Therapy , University of Pernambuco , Petrolina , Brazil. , (Brazil)
  • 2 b Department of Physical Education , Tabosa de Almeida University Center - Asces Unita , Caruaru , Brazil. , (Brazil)
  • 3 c Department of Physical Education , Federal Rural University of Pernambuco , Recife , Brazil. , (Brazil)
Type
Published Article
Journal
Journal of Sports Sciences
Publisher
Informa UK (Taylor & Francis)
Publication Date
Mar 01, 2018
Volume
36
Issue
5
Pages
571–577
Identifiers
DOI: 10.1080/02640414.2017.1324205
PMID: 28537843
Source
Medline
Keywords
License
Unknown

Abstract

Scapular dyskinesis is the term used to describe changes in the positioning or movement of the scapula. Such dysfunction is associated with changes in the activation of the scapular muscles. However, the influence of the axial muscles on the scapular muscles activity of subjects with scapular dyskinesis is unknown. This study aimed to compare the electromyography (EMG) activity of periscapular muscles and its correlation with the external oblique muscle during the execution of push-up performed in different surfaces, in volunteers with and without scapular dyskinesis. Thirty-six men, divided in two groups (control and dyskinesis), performed push-up on stable and unstable surface. The EMG activity of serratus anterior (SA_5th and SA_7th fibers), upper (UT) and lower (LT) trapezius, external oblique (EO) was recorded during execution of each task condition. Statistical analyzes were performed using two way ANOVA repeated measures and Pearson correlation. It was observed effect of interaction between factors, being evidenced increased activity of UT, SA_7th and OE for the control group and decreased activity of SA_5th, SA_7th and EO for dyskinesis group during execution of push-up on unstable surface. In both groups positive correlations (r > 0.47) were observed between EMG activity of SA and EO. In the exercises tested, there seems to be an anatomical and functional relationship between the SA and EO muscles. The use of the unstable surface promotes increased neuromuscular demand, but the neuromuscular strategies appear to differ between groups.

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