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Master's Dissertation
DOI
10.11606/D.39.2011.tde-06062011-151802
Document
Author
Full name
Rodrigo Borghi de Oliveira
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2011
Supervisor
Committee
Oliveira, Jorge Alberto de (President)
Barela, José Angelo
Freudenheim, Andrea Michele
Title in Portuguese
Análise da perna dominante do chutar de crianças: condições de bola parada e em movimento
Keywords in Portuguese
Chutar
Controle motor
Coordenação
Restrições
Abstract in Portuguese
A análise do chute através de técnicas biomecânicas pode auxiliar na compreensão do comportamento e organização do sistema motor. Ao identificar a predominância, emergência ou variabilidade de um padrão de movimento, deve-se considerar a interação de elementos internos e externos ao indivíduo, seja o ambiente onde está sendo executada a ação, as características que envolvem a tarefa ou as particularidades do organismo do executante. O objetivo deste trabalho foi analisar e comparar o padrão de movimento e o desempenho da habilidade motora chutar, a um alvo, em duas condições: bola parada e bola em movimento. Com o propósito de detectar a influência da faixa etária na execução desta tarefa, participaram deste estudo 10 crianças divididas em dois grupos: G1 (8 a 9 anos) e o G2 (12 a 13 anos). Cada criança realizou 10 chutes a um alvo em ambas as condições. As tentativas foram capturadas por duas câmeras de alta velocidade e foram obtidos dados referentes ao desempenho, variabilidade, coordenação e amplitude do movimento. A análise estatística detectou ajustes na coordenação e amplitude do movimento além de um aumento da variabilidade na condição da bola em movimento. Em relação à idade, foram encontradas diferenças estatisticamente significantes na velocidade do pé. Os resultados demonstraram que os grupos etários estudados apresentaram ajustes similares na coodenação do movimento. A condição da bola provocou adaptações no padrão de movimento, entretanto, apesar do aumento nos níveis de variabilidade, não exerceu influência no desempenho do chutar
Title in English
Analysis of the kick dominant leg of children: conditions of stationary and moving ball
Keywords in English
Constraints
Coordination
Kick
Motor control
Abstract in English
The analysis of kicking through biomechanics techniques can help the comprehension of behavior and motor system organization. In order to identify the predominance, emergence, or variability of a moving pattern, is imperative to consider the interactions between internal and external elements to the individual, such as the environment where the action is executed, characteristics that are intrinsic to the task or any individual particularity. The aim of the present work was to analyze and compare the performance and movement pattern of the kick realized by children to a target, in two different conditions: stationary and moving ball. To enable us to detect the age influence on the execution of the given task, the experimental group comprised 10 children from different ages: group 1 (G1) children from 8 to 9 years old and group 2 (G2) children from 12 to 13 years old. Each participant performed 10 kicks to the target in both conditions. Attempts were captured by two high speed cameras and were obtained data to analyze performance, variability, coordination and range of motion. Statistical analysis showed adjustments in coordination and range of motion, besides an increase of variability in the condition of moving ball in relation to the stationary ball condition. Regarding the age, it was found differences statistically significant only in the foot velocity. The results showed that the age groups studied had similar adjustments in movement coordination. The moving ball condition led to adjustments in the movement pattern, however, despite the increase in the variability, the performance was not different in relation to the stationary ball condition
 
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Publishing Date
2011-06-07
 
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