Respostas neuromusculares agudas ao exercício com pesos realizado a diferentes intensidades em idosas treinadas
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Data
2012-09-25
Autores
Prado, Alexandre Konig Garcia [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
INTRODUÇÃO: A manipulação da intensidade do exercício com pesos (EP) está intimamente relacionada a importantes alterações no volume de exercício. A interação entre intensidade e volume do EP tem papel importante nas alterações agudas do sistema neuromuscular (SNM), sendo que a dinâmica de recuperação desse sistema determina a frequência do EP. Porém, a influência da manipulação da intensidade e volume do EP no processo de recuperação do SNM tem sido pouco estudada, principalmente em indivíduos idosos treinados. OBJETIVO: Analisar o efeito de diferentes intensidades no volume do EP e na resposta neuromuscular aguda, em idosas treinadas. MATERIAIS E MÉTODOS: Dezoito mulheres idosas treinadas com pesos (67,72 ± 6,04 anos; 64,47 ± 10,96 kg; 1,60 ± 0,06 m; 25,21 ± 4,07 kg/m2) participaram do estudo. As participantes realizaram uma condição controle (CON) e três condições com EP, a saber: 1) três séries até a fadiga muscular com intensidade de 100% de 13-15 repetições máximas (RM); 2) duas séries com 15 repetições e a terceira até a fadiga, com intensidade de 90% (90% CF) de 13-15 RM; 3) três séries de 15 repetições com intensidade de 90% de 13-15 RM, sem fadiga na última série (90% SF). Os exercícios foram realizados em um aparelho Leg-press, com intervalo de recuperação entre as séries de 2 minutos e controle da velocidade. Avaliações do sistema neuromuscular [contração voluntária máxima (CVM); taxa de desenvolvimento de força pico (TDFP); root mean square (RMS) e frequência mediana da atividade eletromiográfica (EMG) dos músculos vasto medial (VM) e vasto lateral (VL)] foram realizadas antes do início da sessão (PRE), imediatamente após (POS 1), no início do primeiro (I1) e segundo (I2) intervalos de recuperação, após dois (POS 2) e cinco minutos (POS 5), bem como 24 (POS 24) e...
INTRODUCTION: The manipulation of weight exercise (WE) intensity is closely related to significant changes on exercise volume. The interaction between WE intensity and volume plays a key role on the acute neuromuscular system (NMS) changes, while the dynamic of its recovery determines the WE frequency. However, the influence of the WE intensity and volume manipulation on the NMS recovery process has been scarcely studied, particularly in trained older individuals. OBJECTIVE: To analyze the effect of different intensities on WE volume and acute neuromuscular responses in elderly trained women. METHODS: Eighteen resistance trained older women (67.72 ± 6,04 years; 64.47 ± 10.,96 kg; 1.60 ± 0.06 m; 25.21 ± 4.07 kg/m2) volunteered for participation. They performed one control condition (CON) and three WE conditions, as follows: 1) three sets to failure at 100% intensity of 13-15 repetition maximum (RM); 2) two sets with 15 repetitions and the third to failure at 90% intensity (90% TF) of 13-15 RM; 3) three sets with 15 repetitions at 90% intensity of 13-15 RM, without failure on the last set (90% NF). The exercises were performed on a Leg-press, with 2-minute rest interval between sets and velocity control. The SNM assessments [maximal voluntary contraction (MVC); peak of rate force development (PRFD); root mean square (RMS) and median frequency of electromyographic (EMG) activity of the vastus medialis (VM) and vastus lateralis (VL)] were performed before exercise (PRE), at the beginning of first (I1) and second (I2) rest intervals, immediately after (POS 1), after two (POS 2) and five minutes (POS 5); 24 (POS 24) and 48 hours (POS 48), taken from the completion of exercise. The number of repetition and the exercise volume were also assessed. A two-way ANOVA (4x8) with repeated measures was applied, with the... (Complete abstract click electronic access below)
INTRODUCTION: The manipulation of weight exercise (WE) intensity is closely related to significant changes on exercise volume. The interaction between WE intensity and volume plays a key role on the acute neuromuscular system (NMS) changes, while the dynamic of its recovery determines the WE frequency. However, the influence of the WE intensity and volume manipulation on the NMS recovery process has been scarcely studied, particularly in trained older individuals. OBJECTIVE: To analyze the effect of different intensities on WE volume and acute neuromuscular responses in elderly trained women. METHODS: Eighteen resistance trained older women (67.72 ± 6,04 years; 64.47 ± 10.,96 kg; 1.60 ± 0.06 m; 25.21 ± 4.07 kg/m2) volunteered for participation. They performed one control condition (CON) and three WE conditions, as follows: 1) three sets to failure at 100% intensity of 13-15 repetition maximum (RM); 2) two sets with 15 repetitions and the third to failure at 90% intensity (90% TF) of 13-15 RM; 3) three sets with 15 repetitions at 90% intensity of 13-15 RM, without failure on the last set (90% NF). The exercises were performed on a Leg-press, with 2-minute rest interval between sets and velocity control. The SNM assessments [maximal voluntary contraction (MVC); peak of rate force development (PRFD); root mean square (RMS) and median frequency of electromyographic (EMG) activity of the vastus medialis (VM) and vastus lateralis (VL)] were performed before exercise (PRE), at the beginning of first (I1) and second (I2) rest intervals, immediately after (POS 1), after two (POS 2) and five minutes (POS 5); 24 (POS 24) and 48 hours (POS 48), taken from the completion of exercise. The number of repetition and the exercise volume were also assessed. A two-way ANOVA (4x8) with repeated measures was applied, with the... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Aging, Exercícios físicos para idosos, Envelhecimento, Transmissão neuromuscular, Musculação
Como citar
PRADO, Alexandre Konig Garcia. Respostas neuromusculares agudas ao exercício com pesos realizado a diferentes intensidades em idosas treinadas. 2012. 73 f. Dissertação - (mestrado) - Universidade Estadual Paulista, Instituto de Biociências de Rio Claro, 2012.