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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

Rivista di Medicina, Traumatologia e Psicologia dello Sport


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The Journal of Sports Medicine and Physical Fitness 2017 Jul 05

DOI: 10.23736/S0022-4707.17.06849-9

Copyright © 2017 EDIZIONI MINERVA MEDICA

lingua: Inglese

Effect of shoulder position on triceps brachii heads activity in dumbbell elbow extension exercises

Daniel de SOUZA ALVES 1, 2, 3 , Thiago T. da MATTA 1, 3, Liliam F. de OLIVEIRA 1, 3

1 Biomedical Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; 2 Physical Education Center Admiral Adalberto Nunes, Brazilian Navy, Rio de Janeiro, Brazil; 3 Physical Education and Sports School, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil


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BACKGROUND: Elbow extension exercises in different shoulder positions are selected to raise distinct effort levels among the triceps brachii heads. Because there are several triceps exercises, its choice is a big challenge on resistance training prescription. The present study aimed to compare the electromyographic signal of triceps brachii long and lateral heads among three different elbow ranges of motion (ROM) during two commonly prescribed elbow extension exercises: overhead dumbbell elbow extension (OD) and lying dumbbell elbow extension (LD).
METHODS: The long and lateral heads electromyographic signals were acquired from 21 resistance-trained men. One to two maximal repetition of each exercise was performed with a 40% load of a maximal voluntary isometric contraction test. The signals of concentric and eccentric phases were divided into three equal ROMs each (initial, middle, and final).
RESULTS: Eccentric phase elicited less muscular activity than concentric in both exercises. Concentric contraction presented the same pattern during OD (long and lateral heads) and LD (lateral head). Initial and middle intervals elicited higher muscle activity than final interval. This behavior was also present in the eccentric contraction (initial demanded less activity than middle and final during both exercises).
CONCLUSIONS: Since both exercises presented similar activation patterns, the prescription of OD and LD on the same training routine should be avoided.


KEY WORDS: Electromyography - Resistance Training - Muscle, Skeletal - Elbow - Shoulder

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Publication History

Manuscript first published online: July 05, 2017
Manuscript accepted: June 28, 2017
Manuscript revised: June 15, 2017
Manuscript received: July 17, 2016

Per citare questo articolo

Souza Alves DD, Matta TT, Oliveira LF. Effect of shoulder position on triceps brachii heads activity in dumbbell elbow extension exercises. J Sports Med Phys Fitness 2017 July 05. DOI: 10.23736/S0022-4707.17.06849-9

Corresponding author e-mail

alvesdaniel@gmail.com