Avaliação da suplementação com extrato da folha de Erythroxylum mucronatum (Benth.) associada ao treinamento de força na melhora do desempenho físico de ratos

• Ano de defesa: 2018
• Autor(a) principal: Silva Filha, Elizabete
• Orientador(a): Quintans Júnior, Lucindo José
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Programa de Pós-Graduação: Pós-Graduação em Ciências da Saúde
• Palavras-chave em Português: Plantas medicinais; Erythroxylaceae; Desempenho atlético; Suplementos nutricionais
• Palavras-chave em Inglês: Medicinal plants; Athletic performance; Nutritional supplements
• Área do conhecimento CNPq: CIENCIAS DA SAUDE
• Link de acesso: http://ri.ufs.br/jspui/handle/riufs/7656

A regular practice of physical activity and an adoption of a diet that supply the individual's metabolic needs are essential for good physical performance. The usage of natural products for this purpose is already described in the literature, mainly by the antioxidant effect. Erythroxylum mucronatum (EM) belongs to the family Erythroxylaceae, known for high concentrations of flavonoids and alkaloids, compounds that are characterized as antioxidants. Therefore, the objective of this study was to evaluate the effect of supplementation based on the ethanolic extract of EM (EEM) in the improvement of the physical performance of rats submitted to strength training. 40 Wistar rats (250-300g), divided into 4 groups: Control Group (GC), Trained (GT), Trained + EEM 50mg / kg (GTEM50), Trained + EEM 150 mg / kg . The trained animals were submitted to strength training for 4 weeks, 5x per week, with a volume of 3 sets with 10 repetitions and intensity 60% of a maximal repetition (1RM), the GC underwent a fictitious training. The body weight was monitored weekly and every 15 days the animals passed through rota-rod, grip strength and 1RM tests. At the end of the 4 weeks of training, the perigonadal and retroperitoneal fat, plantar muscles (MP) and blood were collected. After weighing, the MP was used to evaluate a lipid peroxidation (TBARS) and activity of the enzyme superoxide dismutase (SOD). Blood were used to measure the levels of alanine (ALT) and aspartate (AST) aminotransferase enzymes, biochemical markers of liver damage and concentration of creatine kinase (CK) and lactate dehydrogenase (LDH) enzymes. Finally, it was carried out the test of muscular resistance and measurements of glycemia (fast, pre, post and 15 ppp-test) and lactate (pre, post and 15 'post-test). Initially, it was identified the total phenolic compounds content (213,29 ± 5,58mg) and total flavonoids (355,73 ± 7,74mg) of the EEM. After 4 weeks of training, the GTEM150 had lower body weight when compared to the GC, in addition, GTEM50 and 150 presented lower amount of fat when compared to GC and GT. All groups presented higher weight of MP when compared to GC. On rota-rod, the GTEM150 showed better performance on the thirtieth day when compared to the GC. In grip strength test, the GTEM50 and 150 groups showed a better performance on the fifteenth day when compared to the GC and on the thirtieth day all the groups were superior to the GC, in addition, the GTEM150 was superior to GT and GTEM50 in the same day. In the 1RM, on the fifteenth day all groups obtained superior results to the GC and on the thirtieth day the GTEM150 was superior to the GT and GTEM50. Regarding the muscular endurance test, it observed that all groups were superior than GC, however, GTEM150 was also better than GT and GTEM50. In addition, the GTEM150 presented lower hypoglycemic response during- and hyperglycemic after- the test. All trained groups had a lower post-test lactate concentration when compared to GC and 15 'post-test the GTEM50 recovered faster than GC and GTEM150 than all groups. In the PM, a lower lipid peroxidation was observed in all groups compared to GC and GTEM150 compared to the others. All groups had increased SOD activity when compared to GC, and GTEM150 an increased activity when compared to GT and GTEM50. In addition, GTEM150 presented lower concentration of CK and LDH in the plasma when compared to all the other groups. Finally, there was no difference in ALT and AST concentration levels. In summary, our results point to an improvement on physical performance in animals supplemented with MEE at a dose of 150 mg / kg.