Efeito do exercício resistido associado à suplementação de creatina ou glutamina na potência anaeróbica

Abstract

This study analyzed the chronic effects of eight weeks training, associated with creatine or glutamine supplementation in anaerobic power. Thirty-two male volunteers (21,7 ± 2,9 years) were randomly placed into three groups: placebo (PLA, n=10), glutamine (GLN, n=11) and creatine (CRE, n=11). A double-blind treatment placebo control design was used to analyze the differences between groups. The cicloergometric Wingate aerobic test was used before (PRE) and after (POS) training, to measure the following variable: maximal anaerobic power (PM), average power (PMed), and fatigue index (IF). The resistive training program involved four sets of 10 maximal repetitions, four times a week. The supplementation dosage was 0.3g(kg.day) -1 (three times a day) during the first week and 0.03 g(kg.day) -1 (once a day) for the following seven weeks. Paired t-test compared the measures between PRE and POS resistive program and ANCOVA was used to analyze the differences between groups. PM was reduced only in the PLA group (P<0.05). PMed was reduced in all groups (PLA and CRE, P<0.01; GLN, P<0.05), and the IF was increased in the PLA group. No differences were found between the groups. These results did not support the idea the increase availability of glutamine or creatine could improve performance by reducing the muscle lactate acidosis. We concluded that the resistive training with creatine or glutamine supplementation did not affect the anaerobic power. abstract - Anaerobic power, Wingate anerobic test, resistive exercise, creatine and glutamine supplementation.