Revista Brasileira de Nutrição Esportiva

1-3

Authors: Francisco Nunes Navarro, Francisco Navarro

Editorial

12-24

Authors: Jardel Schlickmann, Fabrizio Caputo

During the years there have been many definitions and concepts ascribed to muscle fatigue (FM), which may represent a multifactorial phenomenon characterized by an inability to keep certain prescribed work intensity or a decline in physical capacity which is recovered after a specified time. Somehow the processes causing fatigue originate in the cortex and spinal cord are defined as central as the processes in peripheral nerves, neuromuscular junction and muscles, are defined as peripheral. A large amount of experimental models, ranging from studies in vitro, as in vivo studies have been used to understand the etiology of FM. Some mechanisms have been proposed as possible causes of central fatigue, these include: 1) increasing the concentration of metabolites during intense muscular activity, such as H +, K +, bradykinin, inorganic phosphate, prostaglandins; 2) a reduction in plasma glucose levels and; 3) increased concentration of plasma tryptophan and 5-hydroxytryptophan (5-ht); 4) and thermodynamic changes in neurotransmitter concentration. We can cite as some of the probable factors responsible for peripheral fatigue: 1) accumulation of extracellular potassium; 2) production of H+; 3) accumulation of inorganic phosphate; 4) formation of free radicals. The NaHCO3 among the most studied alkaloids in sports with high energy demands of high intensity production of H+. Studies have shown increases in performance when administered alkaloids, that despite the acidity favor some specific mechanism at the cellular level, maintaining the pH is still a crucial factor in the magnitude of fatigue. Key words: Muscular fatigue; Physical exercise; Alkaloids.

33-43

Authors: Maira Cristina Ferigollo, Micheli Mayara Trentin, Fernanda Grison Confortin

The assessment of body composition, hydration and sweat rate are essential for athletes in the way to helping them to improve their performance. This study aimed at assessing hydration status, sweat and body composition of male athletes practicing handball who compete in the league of western state of Santa Catarina. It was evaluated seven male players, aged between 19 and 45 years old. The assessment of nutritional status and hydration were performed using the method of bioelectrical impedance analysis; hydration habits of athletes were assessed using a semi-structured questionnaire, and sweat rate was calculated during a technical and tactical training. The study followed the rules of CNS 196/96 Resolution. All the athletes are eutrophic featuring average fat percentage corresponding to 11.91 +0.68, which is considered optimal for obtaining good athletic performance. Regarding to hydration, all handball athletes are well hydrated, with an average percentage of body water equivalent to 71 + 0.65, according to the bio-impedance test. The sweat rate showed corresponding average of 6.10 + 1.47 ml / min and the percentage of weight loss was less than 1% for all individuals. The hydration habits revealed that 100% of the athletes believe that drinking fluids before, during and after training and competition interferes with the performance of physical activity. In that sense, it reinforces the importance of the performance of professional physical educator and dietitian to improve nutritional status and performance of athletes. Key words: Nutritional status; Fluid therapy; Athletic performance.

50-56

Authors: Bruna Montanheiro Médici, Daniele Ramos Caparros, Márcia Nacif

Futsal is an intermittent activity, which combines effort of moderate and high intensity with efforts of medium and low intensities. Players have very high energy, metabolic and neuromuscular spent and need an appropriate diet, body composition and hydration. The purpose of this study was to evaluate the nutritional profile of professional futsal players. It is cross-sectional study with professional soccer players from a club of Santo André (SP). Were evaluated anthropometric variables of weight, height, skin folds and body circumferences for the characterization of nutritional status. Data of food consumption, hydration during the training and supplementation were also questioned. The study included 13 male professional futsal athletes with a mean age of 22,46 years (± 3,89). On average the players were classified as eutrophic, according to BMI, but they had a body fat percentage above the recommendations. In relation to food consumption was observed a low intake of carbohydrates. The hydration during training was an average water intake of 676,92mL (± 341,94). These data highlight the need for nutritional counseling for athletes, because the player’s food and nutrition are critical to their health, performance and ensuring maximum accomplishment. Key words: Body composition; Eating behavior; Hydration.

66-75

Authors: Dirceu Santos Brito, Rafaela Liberali

The objective of this study to check the consumption of nutritional supplements in physical exercise practitioners, aged between 18 and 60 years at gyms in Victory of Conquest - BA. It is a descriptive study. The sample consisted of 137 people; they are 46 users of nutritional supplements (47.5% males and 52.5% females). Consumption of nutritional supplements was determined by applying a questionnaire adapted bounded in the variables: most commonly used supplement, purpose of use, correct use, who said. The supplement most consumed was the whey protein (n = 11); Thermogenic (n = 11) and BCAA (n = 5); with daily consumption (52%). The main objective with supplementation was the muscle hypertrophy and 80% were satisfied with their use. The indication of the supplement was made in 33% of cases by the nutritionist. What was spent on nutritional supplements from R$ 51.00 to R$ 75.00 (31%). The time of exercise resulted in 3 to 6 hours / week (48%), 49% practice exercises to more than one year in order to increase muscle mass (50%) being the most practiced is the weight (39% ). It was concluded that although it was higher prescription by a qualified professional, the use of supplements in the group studied is low, but it is always the need for nutrition education to ensure safe use. Key words: Nutritional Supplements; Physical Activity; Academies.