Suplementacao aguda de cafeina relacionada ao aumento de forca

Objective: This study aims to determine whether the acute caffeine improves performance in endurance exercise of power. Materials and Methods: We selected 12 subjects (body mass 72.08 ± 11.58 kg, age 27.58 ± 5.64 years; fat percentage 15.20 ± 4.83%) physically active, with more than a year training in bodybuilding, aged between 20 and 35 years of both sexes. This was a test of 1 repetition maximum (RM) to identify 65% of the maximum strength of individuals. The exercises chosen for the study were the Bench Plan and Leg Press 45. After a specific load of 65%, the test was conducted so that the subjects had to reach the fatigue concentric exercise. Within the implementation of the Plan and the bench press Leg press 45 there was an interval of 5 minutes. Results: Discussion: It is believed that caffeine has mechanisms for central and peripheral action that may trigger important metabolic and physiological changes, which seem to improve athletic performance in the exercises of medium and long term, and those of short duration and high intensity. Few studies have evaluated its effects on endurance and strength. Conclusion: There was no significant difference between the placebo and caffeine, which is necessary for studies in relation to the standard dose protocol and methodology. Key words: Caffeine, Ergogenic; Performance; Resistance Force. Objetivo: O objetivo do presente estudo foi examinar se a suplementacao aguda de cafeina melhora a performance nos exercicios de forca. Materiais e Metodos: Foram selecionados 12 individuos (massa corporal 72,08 ± 11,58 kg; idade 27,58 ± 5,64 anos; percentual de gordura 15,20 ± 4,83%) fisicamente ativos, com mais de um ano de treino em musculacao, com idade entre 20 e 35 anos, de ambos os generos. Foi realizado um teste de 1 repeticao maxima (RM) para identificacao de 65% da forca maxima dos individuos. Os exercicios escolhidos para o estudo foram o Supino Plano e o Leg Press 45°. Apos determinada a carga de 65%, o teste foi realizado de maneira que os individuos tinham que alcancar a fadiga concentrica dos exercicios. Entre a execucao do Supino Plano e o Leg press 45° houve um intervalo de 5 minutos. Resultados: Apos os testes, verificou-se que nao houve diferenca significante no exercicio de Supino Plano (p) = 0,0665. No entanto, o exercicio de Leg Press 45° houve diferenca significante onde (p) = 0,0415. Discussao: A hipotese de que e de uma acao proveniente do SNC, nao parece ser correta, pois as teorias sobre a inibica