Efeito da ingestão aguda de cafeína no desempenho de soco e respostas perceptivas em atletas de esportes de combate

• Autor(a) principal: Azevedo, Arthur Persio de
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/11128
• topic: Caffeine; Sport performance; Combat sports; Martial arts; Cafeína; Desempenho esportivo; Esportes de combate; Artes marciais; Nutrição

The beneficial effects of caffeine intake on athletic performance, especially in prolonged exercise with aerobic predominance, are well documented in the scientific literature. In addition, there is increasing evidence of its application in short duration and high intensity exercise. Combat sports generally involve intermittent efforts, where strokes are delivered with maximum power. The effect of caffeine intake on the performance of combat athletes was, however, little explored until then. The aim of the present study was to evaluate the effect of acute caffeine intake on the intermittent performance of punches and perceptual responses combat sports athletes. 11 male combat athletes aged 18-35 years and weighing between 70kg and 95kg were selected and submitted to an intermittent punch protocol consisting of three periods of 15 seconds, with interval of 45 seconds, where they were instructed to deliver the largest number of punches with the dominant member with the greatest possible force. Performance indicators (number of punches and maximum strength and average of punches) were collected, besides subjective measures of physical and mental readiness and perception of effort. After a familiarization session and on different days, participants underwent the same protocol in two conditions, in a randomized and double-blinded fashion: 60 minutes after the ingestion of a solution containing caffeine (5 mg / kg) or placebo (flavored water) . There were no differences in the number of punches delivered in each series (p = 0.4562) or in the total number of punches (p = 0.99), as well as on the maximum force (p = 4534) and mean force of the punches (p = 0.7044). In addition, there were no differences in physical (p = 4235) or mental (p = 0.99) readiness to invest in effort and subjective perception of exertion between placebo and caffeine conditions (p = 0.2826). We can conclude that the intake of 5mg / kg of caffeine was not able to change the performance of fighters' punches when we evaluated the frequency of blows, medium and maximum strength, PSE and mental and physical readiness to invest in the effort.