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Type:	Artigo de Periódico
Title:	Peak of neuromuscular activation and angle where it occurs during bench press exercise performed with different repetition number and duration in resistance trained individuals
Authors:	Lucas Túlio de Lacerda Mauro Heleno Chagas Marina Gurgel Simões Rodrigo César Ribeiro Diniz Marcel Bahia Lanza Gustavo Henrique Peixoto André Gustavo Pereira de Andrade Fernando Vitor Lima
Abstract:	The present study compared neuromuscular activation, measured by surface electromyography (EMG) amplitude [measure by EMG peak (EMGPEAK)] and range of motion (ROM) where EMGPEAK occurred between two training protocols, matched by time under tension, but with a different number and duration of repetitions. Sixteen recreationally trained males performed 2 training protocols with 3 sets, 180 s of rest with 60% of one-repetition maximum(1RM) on the bench press performed in a Smith machine. Protocol A consisted of 6 repetitions with a repetition duration of 6 s and protocol B consisted of 12 repetitions with a repetition duration of 3 s. EMG activity of anterior deltoid, pectoralis major and triceps brachii muscles were recorded. The results showed a general higher EMG amplitude (regardless of the muscle) in protocol B (p = 0.010), and pectoral and triceps brachii consistently presented higher neuromuscular activation than anterior deltoid at both protocols (p = 0.007). Additionally, the ROM where EMGPEAK occurred in triceps brachii was in the middle of the concentric action (~50% of ROM), this occurred in the first half of the same action (~24% of ROM) in the other muscles. In conclusion, protocol B demonstrated an increased EMG amplitude over protocol A, although both protocols responded similarly by achieving the highest EMG amplitude at same ROM among the muscles analysed.
Subject:	Eletromiografia Amplitude de movimento articular Mecanica humana Fisiologia humana Força muscular - Testes
language:	eng
metadata.dc.publisher.country:	Brasil
Publisher:	Universidade Federal de Minas Gerais
Publisher Initials:	UFMG
metadata.dc.publisher.department:	EEF - DEPARTAMENTO DE ESPORTES
Rights:	Acesso Restrito
metadata.dc.identifier.doi:	https://doi.org/10.1016/j.jbiomech.2019.109465
URI:	http://hdl.handle.net/1843/43663
Issue Date:	2020
metadata.dc.url.externa:	https://www.sciencedirect.com/science/article/pii/S0021929019307158?via%3Dihub
metadata.dc.relation.ispartof:	Journal of Biomechanics
Appears in Collections:	Artigo de Periódico

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