دورية أكاديمية
Non-uniform excitation of the pectoralis major muscle during flat and inclined bench press exercises.
العنوان: | Non-uniform excitation of the pectoralis major muscle during flat and inclined bench press exercises. |
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المؤلفون: | Cabral HV; Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham, UK., de Souza LML; Laboratório de Biomecânica, Programa de Engenharia Biomédica (COPPE), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil., de Oliveira LF; Laboratório de Biomecânica, Programa de Engenharia Biomédica (COPPE), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.; Laboratório de Biomecânica Muscular, Escola de Educação Física e Desportos, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil., Vieira TM; Laboratorio di Ingegneria del Sistema Neuromuscolare (LISiN), Politecnico di Torino, Torino, Italy.; PolitoBIOMed Lab, Politecnico di Torino, Torino, Italy. |
المصدر: | Scandinavian journal of medicine & science in sports [Scand J Med Sci Sports] 2022 Feb; Vol. 32 (2), pp. 381-390. Date of Electronic Publication: 2021 Oct 23. |
نوع المنشور: | Journal Article |
اللغة: | English |
بيانات الدورية: | Publisher: Munksgaard International Publishers Country of Publication: Denmark NLM ID: 9111504 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1600-0838 (Electronic) Linking ISSN: 09057188 NLM ISO Abbreviation: Scand J Med Sci Sports Subsets: MEDLINE |
أسماء مطبوعة: | Publication: Copenhagen : Munksgaard International Publishers Original Publication: Copenhagen : Munksgaard, c1991- |
مواضيع طبية MeSH: | Pectoralis Muscles* , Resistance Training*, Electromyography ; Exercise ; Humans ; Muscle Strength ; Muscle, Skeletal ; Weight Lifting |
مستخلص: | Non-physiological sources may lead to equivocal interpretation on the degree of muscle excitation from electromyograms (EMGs) amplitude. This presumably explains the contradictory findings regarding the effect of the bench press inclination on the pectoralis major (PM) activation pattern. To contend with these issues, herein we used high-density surface EMG to investigate whether different PM regions are excited during the flat and 45° inclined bench press exercises. Single-differential EMGs were collected from 15 regions along the PM cranio-caudal axis, while 8 volunteers performed a set of the flat and 45° inclined bench press at 50% and 70% of 1 repetition maximum. The coefficient of variation, the range of motion, and the cycle duration were calculated from the barbell vertical position to assess the within-subject consistency across cycles. The number of channels detecting the largest EMGs amplitude (active channels), their interquartile range, and their barycentre coordinate were assessed to characterize the EMG amplitude distribution within PM. No significant differences in the range of motion (p > 0.11), cycle duration (p > 0.28), number of active channels (p > 0.05), and interquartile range of active channels (p > 0.39) were observed between the two bench press inclinations. Conversely, the barycentre shifted toward the PM clavicular region (p < 0.001) when the bench press changed from flat to 45°. Our results revealed that greatest EMG amplitudes were concentrated at the PM sternocostal and clavicular heads when exercising in the flat and 45° inclined bench press, respectively. Performing the bench press exercise, with different postures, seem to demand the excitation of different PM regions. (© 2021 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.) |
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معلومات مُعتمدة: | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; Conselho Nacional de Desenvolvimento Científico e Tecnológico; Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro; Financiadora de Estudos e Projetos |
فهرسة مساهمة: | Keywords: bench press variations; dynamic contractions; electromyography; high-density surface electromyography; resistance training |
تواريخ الأحداث: | Date Created: 20211013 Date Completed: 20220114 Latest Revision: 20220114 |
رمز التحديث: | 20221213 |
DOI: | 10.1111/sms.14082 |
PMID: | 34644424 |
قاعدة البيانات: | MEDLINE |
تدمد: | 1600-0838 |
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DOI: | 10.1111/sms.14082 |