Reliability of electromyographic amplitude values of the upper limb muscles during closed kinetic chain exercises with stable and unstable surfaces


Autoria(s): ARAUJO, Rodrigo Cappato de; TUCCI, Helga Tatiana; ANDRADE, Rodrigo de; MARTINS, Jaqueline; BEVILAQUA-GROSSI, Debora; OLIVEIRA, Anamaria Siriani de
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

19/10/2012

19/10/2012

2009

Resumo

The purpose of the present study was to evaluate the intra and interday reliability of surface electromyographic amplitude values of the scapular girdle muscles and upper limbs during 3 isometric closed kinetic chain exercises, involving upper limbs with the fixed distal segment extremity on stable base of support and on a Swiss ball (relatively unstable). Twenty healthy adults performed the exercises push-up, bench-press and wall-press with different effort levels (80% and 100% maximal load). Subjects performed three maximal voluntary contractions (MVC) in muscular testing position of each muscle to obtain a reference value for root mean square (RMS) normalization. Individuals were instructed to randomly perform three isometric contraction series, in which each exercise lasted 6 s with a 2-min resting-period between series and exercises. Intra and interday reliabilities were calculated through the intraclass correlation coefficient (ICC 2.1), standard error of the measurement (SEM). Results indicated an excellent intraday reliability of electromyographic amplitude values (ICC >= 0.75). The interday reliability of normalized RMS values ranged between good and excellent (ICC 0.52-0.98). Finally, it is suggested that the reliability of normalized electromyographic amplitude values of the analyzed muscles present better values during exercises on a stable surface. However, load levels used during the exercises do not seem to have any influence on variability levels, possibly because the loads were quite similar. (C) 2007 Elsevier Ltd. All rights reserved.

State of Sao Paulo Research Foundation (FAPESP)

National Council for Scientific and Technological Development (CNPq)

Identificador

JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY, v.19, n.4, p.685-694, 2009

1050-6411

http://producao.usp.br/handle/BDPI/23708

10.1016/j.jelekin.2007.11.014

http://dx.doi.org/10.1016/j.jelekin.2007.11.014

Idioma(s)

eng

Publicador

ELSEVIER SCI LTD

Relação

Journal of Electromyography and Kinesiology

Direitos

restrictedAccess

Copyright ELSEVIER SCI LTD

Palavras-Chave #Electromyography #Reliability #Closed kinetic chain #Exercises #Swiss ball #ISOMETRIC CONTRACTIONS #UPPER EXTREMITY #EMG #SHOULDER #FORCE #REPEATABILITY #ACTIVATION #REHABILITATION #FATIGUE #BALANCE #Neurosciences #Physiology #Rehabilitation #Sport Sciences
Tipo

article

original article

publishedVersion