Influencia da suplementação de creatina na modulação da captação de glicose em ratos sumetidos ou não a atividade fisica / Influece of creatine supplementation on glucose uptake in rats submitted or not to physical activity

AUTOR(ES)

Thiago Onofre Freire

DATA DE PUBLICAÇÃO

2006

RESUMO

Creatine is one of the most used dietary supplement among athletes and physical active people. The benefits of creatine intake are related to increase muscle mass, power and performance, especially in high intensity, short term exercises. Recently studies have suggested that creatine supplementation can modulate glucose homeostasis by increasing glucose uptake in peripheral tissues. The aim of this study was to investigate the effects of creatine supplementation on muscle and hepatic glycogen and glucose tolerance in rats submitted or not to physical activity for 4 and 8 weeks. Eighty male, Wistar, rats were divided in two groups: 4 and 8 weeks. Then each group was subdivided in 4 subgroups, according to supplement intake and submission to exercise: Sedentary Control (CS); Trained Control (CT); Supplemented Sedentary (SS); and Supplemented Trained (ST). The animals had free access to water and chow, supplemented groups had 2% of their diet as creatine monohydrated. The exercise groups swam for 40 min / day for 4 days / week with 2 to 5% of their body weight attached to the chest. After 4 and 8 weeks, oral glucose tolerance tests were performed. On the subsequent day rats were killed and muscle and liver were collected and stored in liquid nitrogen for subsequent analysis. No changes in either glycogen content (muscle and hepatic tissue) or glucose tolerance were observed. This study shows that creatine supplementation do not alter glucose homeostasis in rats submitted or not to physical activity for 4 and 8 weeks

ASSUNTO(S)

diabetes exercicios fisicos creatine glucose diabetes metabolismo exercise glicose creatina metabolism

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