Efeito do esteroide anabolico androgenico nandrolona sobre o metabolismo do glicogenio em ratos sedentarios e treinados

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

Glycogen supercompensation is one of the adaptations induced by physical training. To potentiate this phenomenon, many athletes use supraphysiological doses of anabolic androgenic steroids (AAS). However, the abuse of these substances can cause many si de effects. Then, the purpose of this study was to evaluate in rats the influence of nandrolone and physical training on glycogen supercompensation, and the effect of AAS on hepatic tissue. Male Wistar rats, 2 months old, randomly divided into four experimental groups: Sedentary + vehicle; Trained + vehicle; Sedentary + AAS; Trained + AAS, received intra-muscular injections (2x/week) ofnandrolone (Deca-Durabolin@, 5 mg/Kg) or vehicle (propilenglycol, 0,2 mL/Kg) during 9 weeks. During this period, trained animaIs were submitted to anaerobic physical training, using a protocol of jumping up and down in water carrying an overload. F orty-eight hours after the last exerci se session animaIs were anesthesiated and sacrificed to do the analysis. In the end of the experimental period, trained rats presented lower body weight and plasmatic triglycerides levels and higher hepatic glycogen content than the respective sedentary. Cardiac glycogen content enhanced in response to the association between physical training and AAS administration, and on soleus it enhanced in response to the treatment with AAS. Trained animaIs treated with vehicle presented higher glycogen content on gastrocnemious red portion than the respective sedentary, and sedentary animais treated with AAS presented higher glycogen concentration than the sedentary treated with vehicle, on the same muscle. On gastrocnemious white portion, physical training enhanced glycogen content, and sedentary animais treated with AAS presented higher glycogen concentration than the sedentary treated with vehicle. Blood glucose was not altered, as well as seric levels of glutamate oxalate transaminase (GOT) and glutamate pyruvic transaminase (GPT). The protocol of physical training used in this experiment was efficient to reduce body weight and to enhance hepatic and muscle glycogen content, mainly on muscles with predominance of white fibers. The use of supraphysiological doses of AAS potentiated only some of these effects with no alteration of seric transaminases levels

ASSUNTO(S)

esteroides anabolicos musculos educação fisica

ACESSO AO ARTIGO

Documentos Relacionados