Effect of hand position on EMG activity of the posterior shoulder musculature during a horizontal abduction exercise

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dc.contributor.authorSchoenfeld, Brad
dc.contributor.authorSönmez, R. Gül Tiryaki
dc.contributor.authorKolber, Morey J.
dc.contributor.authorContreras, Bret
dc.contributor.authorHarris, Robert
dc.contributor.authorÖzen, Şerife
dc.date.accessioned2021-06-23T19:34:14Z
dc.date.available2021-06-23T19:34:14Z
dc.date.issued2013
dc.departmentBAİBÜ, Spor Bilimleri Fakültesi, Beden Eğitimi ve Spor Eğitimi Bölümüen_US
dc.description.abstractSchoenfeld, B, Sonmez, RGT, Kolber, MJ, Contreras, B, Harris, R, and Ozen, S. Effect of hand position on EMG activity of the posterior shoulder musculature during a horizontal abduction exercise. J Strength Cond Res 27(10): 2644-2649, 2013The reverse fly machine is a popular exercise for strengthening the horizontal shoulder abductors including the posterior deltoid. There seems to be little consensus as to which hand position most effectively targets the posterior deltoid despite this option on most machines. This study investigated the impact of varying one's hand position, and consequently altering shoulder joint rotation, on muscle activity in various glenohumeral muscles during exercise on the reverse fly machine. Nineteen resistance-trained men (mean age = 23.2 +/- 4.3 years; height = 176.9 +/- 7.1 centimeters; body mass = 81.3 +/- 10.5 kilograms; body mass index = 25.9 +/- 2.6) were recruited from a university population to participate in the study. In a repeated measures design, subjects grasped the hand bars on the machine with either a pronated (PRO) or neutral (NEU) grip and performed dynamic horizontal abduction repetitions to muscular failure using a load equating to approximately 75% body weight. The order of performance of the hand positions was counterbalanced between participants so that approximately half of the subjects performed PRO first and the other half performed NEU first. Surface electromyography was used to record both mean and peak muscle activity of the posterior deltoid, middle deltoid, and infraspinatus. Results showed that mean electromyography activity for the posterior deltoid was significantly greater in NEU compared with PRO (p = 0.046; 95% CI = 0.1-7.4% maximal voluntary isometric contraction). Similarly, mean electromyography activity of the infraspinatus also was significantly greater in NEU compared with PRO (p = 0.002; 95% CI = 3.7-13.6% maximal voluntary isometric contraction). The results of this study show that performing exercise on the reverse fly machine with a neutral hand position significantly increases activity of the posterior deltoid and infraspinatus muscles compared with a PRO hand position.en_US
dc.identifier.doi10.1519/JSC.0b013e318281e1e9
dc.identifier.endpage2649en_US
dc.identifier.issn1064-8011
dc.identifier.issn1533-4287
dc.identifier.issue10en_US
dc.identifier.pmid23302754en_US
dc.identifier.scopus2-s2.0-84888220633en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage2644en_US
dc.identifier.urihttps://doi.org/10.1519/JSC.0b013e318281e1e9
dc.identifier.urihttps://hdl.handle.net/20.500.12491/7433
dc.identifier.volume27en_US
dc.identifier.wosWOS:000325099200004en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.institutionauthorÖzen, Şerife
dc.language.isoenen_US
dc.publisherLippincott Williams & Wilkinsen_US
dc.relation.ispartofJournal Of Strength And Conditioning Researchen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectReverse Fly Machineen_US
dc.subjectInternal Rotationen_US
dc.subjectExternal Rotationen_US
dc.subjectNeutral Gripen_US
dc.subjectPronated Gripen_US
dc.subjectGlenohumeral Musclesen_US
dc.subjectInfraspinatusen_US
dc.subjectMiddle Deltoiden_US
dc.subjectRear deltoiden_US
dc.titleEffect of hand position on EMG activity of the posterior shoulder musculature during a horizontal abduction exerciseen_US
dc.typeArticleen_US

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