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

• Main Authors: Rafael A. Battazza (Author), Frank S. Suzuki (Author), Marcelo M. Kalytczak (Author), Marcos R. R. Paunksnis (Author), Fabiano Politi (Author), Alexandre L. Evangelista (Author), Andrey J. Serra (Author), Cauê V. L. S. Teixeira (Author), Roberta L. Rica (Author), Francisco Luciano Pontes Junior (Author), Marco Bergamin (Author), Danilo S. Bocalini (Author)
• Format: Book
• Published: Universidade Estadual Paulista (UNESP).
• Subjects: article
• Online Access: Connect to this object online.

Summary

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.

Item Description

1980-6574
10.1590/s1980-6574201900010004