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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electromyographic evaluation of upper limb muscles involved in armwrestling sport simulation during dynamic and static conditions

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Author(s):
de Oliveira Silva, Daniela Cristina [1] ; Silva, Zenon [2] ; Sousa, Gilmar da Cunha [2] ; Gouvea e Silva, Luiz Fernando [2] ; Marques, Karina do Valle [2] ; Soares, Alcimar Barbosa [3] ; Cerqueira, Esem Pereira [4] ; Liberti, Edson Aparecido [4] ; Berzin, Fausto [1]
Total Authors: 9
Affiliation:
[1] State Univ Campinas FOP UNICAMP, Dept Morphol, Dent Fac Piracicaba, Av Limeira 901, BR-13414903 Piracicaba, SP - Brazil
[2] Univ Fed Uberlandia, Nucleus Morphol, Inst Biomed Sci, Uberlandia, MG - Brazil
[3] Univ Fed Uberlandia, Lab Biomed Engn, Uberlandia, MG - Brazil
[4] Univ Sao Paulo, Dept Anat, Inst Biomed Sci, Sao Paulo, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY; v. 19, n. 6, p. E448-E457, DEC 2009.
Web of Science Citations: 5
Abstract

Objective: To evaluate the electromyographic activity of the Pectoralis Major (PM), Biceps Brachii (BB), Pronator Teres (PT) and Flexor Carpi Ulnaris (FCU) muscles involved in simulated armwrestling. Methods: Ten trained volunteers were selected to perform the armwrestling movement, during dynamic tests with 40% and 80% of maximum voluntary load (MVL) and static tests in the initial, intermediary and final positions. Electromyographic and force data were normalized for analyses. Results: In dynamic tests with 40% MVL, electric activity of the PT muscle was greater than FCU (p < 0.01) and BB (p < 0.05) muscles, and with 80% MVL, PM and PT muscles were the most active. In static tests, electric activity increased from the initial to final positions for the PM muscle (p < 0.05), while it decreased for the BB and PT muscles (p < 0.001 and p < 0.05, respectively). No significant changes were observed for force and no correlation was found with the simultaneous electric activity. Conclusions: It can be concluded that the PM and FCU muscles participate as agonists in the simulated armwrestling whereas the BB and PT muscles seem to perform secondary functions. Electric activity showed to be dependent on the load and on the position of the upper limb, but not on the force produced during the movement. (C) 2008 Elsevier Ltd. All rights reserved. (AU)