%0 Journal Article
%T Effects of short-term isokinetic training with reciprocal knee extensors agonist and antagonist muscle actions: A controlled and randomized trial
%A Rafael Cunha
%A Rodrigo L. Carregaro
%A Andr¨¦ Martorelli
%A Amilton Vieira
%J Brazilian Journal of Physical Therapy
%D 2013
%I Associa??o Brasileira de Pesquisa e P¨®s-Gradua??o em Fisioterapia
%X BACKGROUND: Previous studies have shown that preloading an antagonist muscle may increase the acute agonist neuromuscular performance. In addition, studies have suggested that very short-term resistance exercise (RE) programs may also be useful to increase strength and muscular performance. OBJECTIVES: To evaluate the effects of three days of RE using a reciprocal action method on the muscular performance of healthy men and to compare these effects with those of a traditional RE group. METHOD: Thirty-three men (21.1 ¡À 2.3 years) were randomly assigned to one of three groups: 1) reciprocal (REC; knee flexion immediately followed by a knee extension exercise); 2) traditional (TRA; non-preload; a concentric knee extension exercise); and 3) control (CON; no exercise). The REC and TRA subjects performed four sets of 10 repetitions at 60o/s with one minute of rest. The pre- and post-RE tests included two sets of four maximal concentric repetitions at 60o/s and 180o/s. A 3x2 ANOVA with Tukey post-hoc was used to analyze the differences in peak torque (PT), rating of acceleration development (RAD) and time to peak torque (TIMEtorque). RESULTS: A significant PT increase was found for REC and TRA (p<0.05) at 60o/s and for REC at 180o/s (p<0.05). There was a decrease in the RAD for REC and TRA (p<0.05), and TIMEtorque showed a significant decrease for REC. The inter-group analysis revealed that REC is more effective than TRA for PT gains at both velocities (p<0.05). CONCLUSION: It is recommended that REC offers benefits for the clinical practice of professionals involved in neuromuscular rehabilitation. CONTEXTUALIZA  O: Estudos demonstraram que a pr¨¦-ativa  o de m¨²sculos antagonistas pode aumentar o desempenho neuromuscular agonista. Al¨¦m disso, estudos sugerem que programas de exerc¨ªcio resistido (ER) de curta dura  o podem ser ¨²teis para aumentar a for a muscular e o desempenho. OBJETIVOS: Avaliar os efeitos de tr¨ºs sess es de ER por meio do m¨¦todo de a  es rec¨ªprocas no desempenho muscular de homens sadios e comparar com um grupo de ER tradicional. M¨¦TODO: Trinta e tr¨ºs homens (21,1 ¡À 2,3 anos) foram randomicamente alocados em tr¨ºs grupos: Rec¨ªproco (REC: uma repeti  o de flex o do joelho imediatamente seguida por uma de extens o do joelho); Tradicional (TRA: exerc¨ªcio conc¨ºntrico de extens o do joelho) e Controle (CON: n o realizaram exerc¨ªcio). O REC e o TRA realizaram quatro s¨¦ries de dez repeti  es a 60o.s-1 com um minuto entre s¨¦ries. As avalia  es pr¨¦ e p¨®s-ER foram caracterizadas por duas s¨¦ries de quatro repeti  es m¨¢ximas a 60o.s-1 e 180o.s-1. Utilizo
%K for a muscular
%K reabilita  o
%K joelho
%K treinamento resistido
%K muscle strength
%K rehabilitation
%K knee
%K resistance training
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-35552013000200137