ABSTRACT
El objetivo del presente estudio consistió en verificar los cambios en las características antropométricas y fisiológicas de futbolistas de la categoría sub-17 de un club profesional. Se seleccionaron de forma no-probabilísticaaccidental 26 futbolistas que presentan un promedio de edad de 16,16±0,75 años al inicio de la pre-temporada y de 16,36±0,75 años al final de la pre-temporada. Se evaluaron las variables antropométricas de la estatura (cm), el peso corporal (kg), porcentaje de grasa (%g), masa grasa (kg) y masa muscular (kg) y las variables físicas del Yo-Yo test Intermitent Recovery (m), Yo-Yo test Endurance (VO2máx en ml/kg/min),velocidad de (20m), agilidad (segundos) y dos pruebas de saltos verticales squast jump (cm) y Contramoviment (cm). Para el análisis estadístico se utilizó la estadística descriptiva de media aritmética y desviación estándar, y para verificar las diferencias significativas se utilizó el test de Student y la prueba de especificidad de Tukey con una (p<0,005). Los resultados muestran que no se encontraron diferencias significativas para el peso corporal total, el peso muscular y para la resistencia especifica del yo-yo test recovery. Sin embargo, los ocho microciclos de entrenamiento si fueron suficientes estadisticamente para modificar el porcentaje de grasa, sumatoria de los pliegues cutaneos y el peso graso, a su vez mejoró la potencia aeróbica, la velocidad, la agilidad, la fuerza explosiva y la fuerza explosiva elástica, respectivamente.
The aim of this study was to verify changes in anthropometric and physiological characteristicsof the 17 years category of players in a accidental 26 players who have an average age of 16.16 ñ 0.75 years at the start of the pre-season and 16.36 ñ 0.75 years at the end of the preseason. We evaluated anthropometric variables height (cm), weight (kg), fat percentage (% g), fat mass (kg) and muscle mass (kg), and physical variables (Yo-Yo Intermittent Recovery Test (m), Yo-Yo Endurance Test (VO2max in ml / kg / min), speed (20m), Agility (seconds) and two squast jump tests (cm) and Contramoviment (cm). For statistical analysis, arithmetic average descriptive statistics and standard deviation were used, and to verify the significant differences, the Student test and a test with a specificity of Tukey were used (p <0.005). The results showed that no significant differences were found for total body weight, muscle weight and the specific resistance of yo-yo Recovery test. However, the eight training microcycles were statistically sufficient alter the percentage of fat, sum of skinfolds and fat weight, and also to improve aerobic power, speed, agility, explosive strength and elastic explosive strength, respectively.
Subject(s)
Humans , Adolescent , Anthropometry , Athletes , Adolescent/physiology , Soccer/physiology , PhysiologyABSTRACT
O objetivo do presente estudo foi verificar se o teste de Vai-e-Vem300mpode ser utilizado para predizer a capacidade anaeróbia, correlacionando com a potênciamédia do teste de Wingate, em um grupo de jogadores de futebol profissional.Participaram do estudo 21 jogadores (21 ± 2 anos; 76,8 ± 7,0 kg; 179,8 ± 6,7 cm)de uma equipe da primeira divisão da Federação Paulista de Futebol. No primeirodia, os participantes realizaram o teste de Wingate e foram determinados o pico depotência relativo, a potência média relativa e o índice de fadiga. No segundo dia,os participantes realizaram o teste de Vai-e-Vem300m, que consistia em corridas devai-e-vem de 20m, na maior velocidade possível, até totalizar a distância de 300 m.Os parâmetros obtidos desse teste foram a duração do Vai-e-Vem300m e a velocidademédia de 20 m (V20m). Antes e após a realização do Vai-e-Vem300m, foramobtidas amostras sangüíneas para determinação da concentração de lactato ([LAC]).Ao realizar a correlação de Pearson entre os parâmetros obtidos no Wingate e noVai-e-Vem300m, apenas a potência média relativa correlacionou significativamente(p<0,05) com a duração do Vai-e-Vem300m (r = - 0,75) e com a V20m (r = 0,72). A[LAC] aumentou significativamente (p<0,05) quando comparados os valores antes(2,1 ± 1,0 mM) e após (14,3 ± 2,4 mM) o Vai-e-Vem300m. Portanto, os resultadosdo presente estudo demonstraram que o teste de Vai-e-Vem300m pode ser utilizadopara predizer a capacidade anaeróbia em jogadores de futebol profissional.
The aim of this study was to investigate whether a 300-m shuttle run testpredicts anaerobic capacity, expressed as mean power output in the Wingate test, in agroup of professional soccer players. Twenty-one soccer players (21 ± 2 years; 76.8 ±7.0 kg; 179.8 ± 6.7 cm) from a first division team of the São Paulo Soccer Federationparticipated in the study. In the first session, the players were submitted to the Wingatetest for the determination of relative peak power output, relative mean power outputand fatigue index. In the second session, the players underwent a shuttle run test whichconsisted of a maximum sprint of 20 m at the highest speed possible until completing adistance of 300 m. The total run time and mean velocity over the 20 m (V20m) wererecorded. Blood samples were collected before and after the 300-m shuttle run test forthe determination of lactate concentration ([LAC]). Pearsons correlation between theWingate and 300-m shuttle run test variables showed that only relative mean poweroutput was significantly correlated (p<0.05) with total run time (r = - 0.75) and V20m(r = 0.72). [LAC] showed a significant increase (p<0.05) when comparing the valuesobtained before (2.1 ± 1.0 mM) and after (14.3 ± 2.4 mM) the shuttle run test. In conclusion,this study demonstrated that the 300-m shuttle run test can predict anaerobiccapacity in professional soccer players.