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CC BY-NC-ND 4.0 · Rev Bras Ortop (Sao Paulo) 2021; 56(01): 031-035
DOI: 10.1055/s-0040-1713387
Artigo Original
Artroscopia e Traumatologia do Esporte

Electromyography of the Pectoralis Major Muscle after Surgical Reconstruction of Chronic Tendon Rupture[*]

Article in several languages: português | English
Benno Ejnisman
1   Departamento de Ortopedia e Traumatologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brasil
,
Carlos Vicente Andreoli
1   Departamento de Ortopedia e Traumatologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brasil
,
Paulo Santoro Belangero
1   Departamento de Ortopedia e Traumatologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brasil
,
William Ricado Komatsu
2   Departamento de Medicina do Esporte e Atividade Física, Universidade Federal de São Paulo, São Paulo, São Paulo, Brasil
,
Debora Cristina Hipolide
3   Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brasil
,
Alberto de Castro Pochini 
1   Departamento de Ortopedia e Traumatologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brasil
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Abstract

Objective To evaluate the electrophysiological activity of the injured pectoralis major (PM) muscle of operated patients who perform weightlifting, more specifically bench press exercises, especially the activity of the clavicular and sternocostal portions of the PM.

Methods All athletes in study I (10 patients) had unilateral complete ruptures during bench press exercises and a history of use of anabolic steroids, an association that is described in up to 86.7% of PM tendon ruptures. The control group included 10 men without PM tendon injury who did not perform bench press exercises. Description of the cross-sectional design. The p-values were obtained by multiple comparisons with Bonferroni correction.

Results In the comparison between the control (C) group and the weightlifters during the postoperative period (POS), we found no evidence of differences in any measurements obtained in the clavicular and sternocostal portions of the PM muscle: clavicular average level (p = 0.847); clavicular standard deviation (SD) (p = 0.777); clavicular area (p = 0.933); clavicular median (p = 0.972); sternocostal average level (p = 0.633); sternocostal SD (p = 0.602); sternocostal area (p = 0.931); and sternocostal median (p = 0.633).

Conclusion In the present study, the electromyographic activity of the PM muscle in weightlifters (bench press exercise) who underwent surgery was within the normal parameters for the clavicular and sternocostal portions studied.

Keywords

pectoralis muscles/injuries - electromyography - athletic injuries - weightlifting/injuries

Financial Support

The present study was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (Fapesp) – under process 2014/04180-6.


* Study conducted at the Department of Orthopedics and Traumatology, Universidade Federal de São Paulo, São Paulo, Brazil.




Publication History

Received: 27 January 2020

Accepted: 10 March 2020

Article published online:
19 February 2021

© 2021. Sociedade Brasileira de Ortopedia e Traumatologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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