Effect of Adduction During Glenohumeral External Rotation Exercises in the Scapulohumeral Muscles

SUMMARY: The effect of adduction during glenohumeral external rotation (ER) exercises on the scapulohumeral muscles is controversial. The aim of this study was to evaluate the effect of carrying out adduction during external rotation exercises in low and high shoulder positions on the electromyograp...

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Autores principales:	Bascour-Sandoval,Claudio, Gajardo-Burgos,Rubén, Gálvez-García,Germán, Barramuño-Medina,Mauricio
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2021
Materias:	Electromyography Shoulder Exercises External rotation Rotator Cuff physical therapy/rehabilitation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000501316
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spelling	oai:scielo:S0717-950220210005013162021-10-19Effect of Adduction During Glenohumeral External Rotation Exercises in the Scapulohumeral MusclesBascour-Sandoval,ClaudioGajardo-Burgos,RubénGálvez-García,GermánBarramuño-Medina,Mauricio Electromyography Shoulder Exercises External rotation Rotator Cuff physical therapy/rehabilitation SUMMARY: The effect of adduction during glenohumeral external rotation (ER) exercises on the scapulohumeral muscles is controversial. The aim of this study was to evaluate the effect of carrying out adduction during external rotation exercises in low and high shoulder positions on the electromyographic (EMG) activity of the infraspinatus (IS), middle deltoid (MD), and posterior deltoid (PD) muscles. EMG activity of the IS, MD, and PD muscles of 20 healthy participants was evaluated. Subjects performed 6 ER exercises that combined two factors: i) different adduction pressures according to biofeedback unit (0, 5 and 10 mmHg), and ii) low and high shoulder position. The pressure was controlled using a biofeedback unit. The low and high shoulder positions were 20? and 90? of abduction. In the low shoulder position, the activity of the IS muscle increased as the pressure on the biofeedback unit increased and the MD and PD muscles presented the highest activity at 10 mmHg. In the high shoulder position, the activity of the IS muscle was higher at 0 and 10 mmHg, the MD muscle presented higher activity at 5 mmHg, and PD muscle activity did not vary with the pressure. The addition of adduction at a pressure of 5 mmHg in the low shoulder position promotes is activity. Likewise, adduction at a pressure of 10 mmHg will promote activity of the IS, MD, and PD.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.39 n.5 20212021-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000501316en10.4067/S0717-95022021000501316
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Electromyography Shoulder Exercises External rotation Rotator Cuff physical therapy/rehabilitation
spellingShingle	Electromyography Shoulder Exercises External rotation Rotator Cuff physical therapy/rehabilitation Bascour-Sandoval,Claudio Gajardo-Burgos,Rubén Gálvez-García,Germán Barramuño-Medina,Mauricio Effect of Adduction During Glenohumeral External Rotation Exercises in the Scapulohumeral Muscles
description	SUMMARY: The effect of adduction during glenohumeral external rotation (ER) exercises on the scapulohumeral muscles is controversial. The aim of this study was to evaluate the effect of carrying out adduction during external rotation exercises in low and high shoulder positions on the electromyographic (EMG) activity of the infraspinatus (IS), middle deltoid (MD), and posterior deltoid (PD) muscles. EMG activity of the IS, MD, and PD muscles of 20 healthy participants was evaluated. Subjects performed 6 ER exercises that combined two factors: i) different adduction pressures according to biofeedback unit (0, 5 and 10 mmHg), and ii) low and high shoulder position. The pressure was controlled using a biofeedback unit. The low and high shoulder positions were 20? and 90? of abduction. In the low shoulder position, the activity of the IS muscle increased as the pressure on the biofeedback unit increased and the MD and PD muscles presented the highest activity at 10 mmHg. In the high shoulder position, the activity of the IS muscle was higher at 0 and 10 mmHg, the MD muscle presented higher activity at 5 mmHg, and PD muscle activity did not vary with the pressure. The addition of adduction at a pressure of 5 mmHg in the low shoulder position promotes is activity. Likewise, adduction at a pressure of 10 mmHg will promote activity of the IS, MD, and PD.
author	Bascour-Sandoval,Claudio Gajardo-Burgos,Rubén Gálvez-García,Germán Barramuño-Medina,Mauricio
author_facet	Bascour-Sandoval,Claudio Gajardo-Burgos,Rubén Gálvez-García,Germán Barramuño-Medina,Mauricio
author_sort	Bascour-Sandoval,Claudio
title	Effect of Adduction During Glenohumeral External Rotation Exercises in the Scapulohumeral Muscles
title_short	Effect of Adduction During Glenohumeral External Rotation Exercises in the Scapulohumeral Muscles
title_full	Effect of Adduction During Glenohumeral External Rotation Exercises in the Scapulohumeral Muscles
title_fullStr	Effect of Adduction During Glenohumeral External Rotation Exercises in the Scapulohumeral Muscles
title_full_unstemmed	Effect of Adduction During Glenohumeral External Rotation Exercises in the Scapulohumeral Muscles
title_sort	effect of adduction during glenohumeral external rotation exercises in the scapulohumeral muscles
publisher	Sociedad Chilena de Anatomía
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000501316
work_keys_str_mv	AT bascoursandovalclaudio effectofadductionduringglenohumeralexternalrotationexercisesinthescapulohumeralmuscles AT gajardoburgosruben effectofadductionduringglenohumeralexternalrotationexercisesinthescapulohumeralmuscles AT galvezgarciagerman effectofadductionduringglenohumeralexternalrotationexercisesinthescapulohumeralmuscles AT barramunomedinamauricio effectofadductionduringglenohumeralexternalrotationexercisesinthescapulohumeralmuscles
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Effect of Adduction During Glenohumeral External Rotation Exercises in the Scapulohumeral Muscles

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