Effects of previous carbohydrate supplementation on muscular fatigue: double-blind, randomized, placebo-controlled crossover study

Abstract AIMS The aim of this study was to examine the effects of previous carbohydrate supplementation on high-volume resistance exercise performance METHODS Twenty males physically independent adults aged ≥18 years participated in a double-blind randomized placebo-controlled crossover study. Sixty minutes before the experimental protocol, each participant ingested 0,6 g.kg of body mass-1 of carbohydrate supplementation or placebo. Maximum voluntary isometric contraction tests were performed before and after the dynamic fatigue induction protocol consisting of 10 sets of 8 repetitions of right leg knee extensors at 120º s-1. RESULTS Lower decrement of the isometric peak torque (p<0,001) and of the rate of torque development (p<0,001) was observed in carbohydrate supplementation after the dynamic protocol. Both concentric and eccentric peak torque differed significantly (p<0,001) between carbohydrate supplementation and placebo treatments from the second set, although the slope of the force-repetitions curve was not different between them. Additionally, the carbohydrate supplementation resulted in a lower session rating of perceived exertion (p<0,05). CONCLUSIONS Previous carbohydrate supplementation attenuates muscle fatigue and internal load exercise in a high-volume isokinetic leg protocol.

Bibliographic Details

Main Authors:	Battazza,Rafael A., Suzuki,Frank S., Kalytczak,Marcelo M., Paunksnis,Marcos R. R., Politi,Fabiano, Evangelista,Alexandre L., Serra,Andrey J., Teixeira,Cauê V. L. S., Rica,Roberta L., Pontes Junior,Francisco Luciano, Bergamin,Marco, Bocalini,Danilo S.
Format:	Digital revista
Language:	English
Published:	Universidade Estadual Paulista 2019
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742019000100709
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