<b>Analysis of maximal isometric force and EMG signal in lower limb exercise</b>. 10.5007/1980-0037.2011v13n6p429

The aim of this study was to compare maximal isometric force (MIF) and the electrical activity of the vastus medialis, vastus lateralis, rectus femoris, gluteus maximus and biceps femoris long head muscles between maximal voluntary contractions (MVC) performed at different joint angles, and to ident...

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Main Authors: Cleiton Silva Correa (Author), Bruna Gonçalves Cordeiro da Silva (Author), Cristine Lima Alberton (Author), Eurico Nestor Wilhelm Neto (Author), Antonio Carlos de Moraes (Author), Claudia Silveira Lima (Author), Ronei Silveira Pinto (Author)
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Izdano: Universidade Federal de Santa Catarina, 2011-11-01T00:00:00Z.
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042 |a dc 
100 1 0 |a Cleiton Silva Correa  |e author 
700 1 0 |a Bruna Gonçalves Cordeiro da Silva  |e author 
700 1 0 |a Cristine Lima Alberton  |e author 
700 1 0 |a Eurico Nestor Wilhelm Neto  |e author 
700 1 0 |a Antonio Carlos de Moraes  |e author 
700 1 0 |a Claudia Silveira Lima  |e author 
700 1 0 |a Ronei Silveira Pinto  |e author 
245 0 0 |a <b>Analysis of maximal isometric force and EMG signal in lower limb exercise</b>. 10.5007/1980-0037.2011v13n6p429 
260 |b Universidade Federal de Santa Catarina,   |c 2011-11-01T00:00:00Z. 
500 |a 1415-8426 
500 |a 1980-0037 
520 |a The aim of this study was to compare maximal isometric force (MIF) and the electrical activity of the vastus medialis, vastus lateralis, rectus femoris, gluteus maximus and biceps femoris long head muscles between maximal voluntary contractions (MVC) performed at different joint angles, and to identify the most suitable positions to normalize the electromyography (EMG) signals from each of these muscles when they are activated under dynamic conditions. Ten men ranging in age from 20 to 30 years, who were familiar with strength training exercise, were studied. MVC at different joint angles of the knee extensors and flexors (0°, 60°, 90°) and hip extensors (-30°, 0°, 60°) and flexors (90°, 120°) were tested. The MIF values differed significantly between the 60° knee flexion and 60° and 90° knee extension positions (p<0.01). The same was not observed for hip flexion or extension (p>0.05). Significantly higher EMG values were only observed for the rectus femoris muscle at 90° knee extension (p<0.01). No differences between muscles were found for knee flexion, hip flexion or hip extension at the joint angles tested (p>0.05). These results suggest that the 60° knee joint flexion position is the most suitable for assessment of knee extension and flexion MIF, and that all positions tested in this study are suitable for the assessment of hip flexion and extension. 
546 |a EN 
546 |a PT 
690 |a Electromyography 
690 |a Hip 
690 |a Knee 
690 |a Muscle contraction 
690 |a Muscle strength. 
690 |a Sports 
690 |a GV557-1198.995 
690 |a Medicine (General) 
690 |a R5-920 
655 7 |a article  |2 local 
786 0 |n Revista Brasileira de Cineantropometria e Desempenho Humano, Vol 13, Iss 6, Pp 429-435 (2011) 
787 0 |n http://www.periodicos.ufsc.br/index.php/rbcdh/article/view/18353/19614 
787 0 |n https://doaj.org/toc/1415-8426 
787 0 |n https://doaj.org/toc/1980-0037 
856 4 1 |u https://doaj.org/article/c39a527b6e624c2eb1b857b7f78f49d7  |z Connect to this object online.