Victor Hugo Alves Okazaki

O efeito da prescrição de cadeira de rodas de basquetebol sobre o desempenho esportivo

It was analyzed the athletic performance in basketball players using wheelchairs prescribed (specific) and not prescribed (non-specific) according to the particularity of each player. Six wheelchair basketball players performed the 20 meters speed test (with and without dribbling a ball), and the agility test without dribbling a ball. Scales of effort and comfort were used after each test. It was verified better performance (P<0,05) and comfort (P<0,05) in the tests performed with the use of the prescribed wheelchair. Therefore, it was suggested that the use of prescribed wheelchair specially designed for each athlete, for the optimization of their performance and comfort in the basketball wheelchair sport.

Análise da hipótese de restrição da ação e do efeito do foco de atenção em tarefa de equilíbrio em plataforma instável

The present study compared internal focus (IF) and external focus (EF) of attention and analyzed the constrained action hypothesis. For such, the balance performance in unstable platform was analyzed concurrently with reaction time task (probe). Twenty-two participants (16 and 17 years old) performed the balance task during 10s and responded to the auditory stimulus. In IF, participants were instructed to direct their attention toward the feet movements and to keep them in a horizontal position. In EF, participants were instructed to direct their attention toward the bottom of the platform seeking to prevent it touching the ground. No difference was found in the performance of the balance task and reaction time task between IF and EF (P>0.05). These results were explained by the experience levels of the participants in the task.

Efecto de la dirección de la transferencia interlateral de aprendizaje en la tarea de secuencia de tocar los dedos

The present study analyzed the effect of interlateral transfer direction while learning a touching finger sequence task. Twenty right-handed participants (18-30 years old) were divided into two groups: practice with the right hand (GD) and left hand (GE). Groups were evaluated during pretest, posttest, and retention phases. The task was performing the higher number of finger touches between tomb and the other fingers, during 10 seconds, in a pre-stablished order. The GE showed higher number of finger touchs with the left hand in posttest (Z=2,2; P=0,028) compared to pretest. The GD increased the number of finger touches from pretest to retention for the right hand (Z=2,4; P=0,017) and left hand (Z=2,6; P=0,009), indicating learning and interlateral transfer of learning. The interlateral transfer of learning from the right to the left hand was explained by the principle of trainability.The present study analyzed the effect of interlateral transfer direction while learning a touching finger sequence task. Twenty right-handed participants (18-30 years old) were divided into two groups: practice with the right hand (GD) and left hand (GE). Groups were evaluated during pretest, posttest, and retention phases. The task was performing the higher number of finger touches between tomb and the other fingers, during 10 seconds, in a pre-stablished order. The GE showed higher number of finger touchs with the left hand in posttest (Z=2,2; P=0,028) compared to pretest. The GD increased the number of finger touches from pretest to retention for the right hand (Z=2,4; P=0,017) and left hand (Z=2,6; P=0,009), indicating learning and interlateral transfer of learning. The interlateral transfer of learning from the right to the left hand was explained by the principle of trainability.

Effect of interlateral transfer of learning direction in touching finger sequence task

The present study analyzed the effect of interlateral transfer direction while learning a touching finger sequence task. Twenty right-handed participants (18-30 years old) were divided into two groups: practice with the right hand (GD) and left hand (GE). Groups were evaluated during pretest, posttest, and retention phases. The task was performing the higher number of finger touches between tomb and the other fingers, during 10 seconds, in a pre-stablished order. The GE showed higher number of finger touchs with the left hand in posttest (Z=2,2; P=0,028) compared to pretest. The GD increased the number of finger touches from pretest to retention for the right hand (Z=2,4; P=0,017) and left hand (Z=2,6; P=0,009), indicating learning and interlateral transfer of learning. The interlateral transfer of learning from the right to the left hand was explained by the principle of trainability.The present study analyzed the effect of interlateral transfer direction while learning a touching finger sequence task. Twenty right-handed participants (18-30 years old) were divided into two groups: practice with the right hand (GD) and left hand (GE). Groups were evaluated during pretest, posttest, and retention phases. The task was performing the higher number of finger touches between tomb and the other fingers, during 10 seconds, in a pre-stablished order. The GE showed higher number of finger touchs with the left hand in posttest (Z=2,2; P=0,028) compared to pretest. The GD increased the number of finger touches from pretest to retention for the right hand (Z=2,4; P=0,017) and left hand (Z=2,6; P=0,009), indicating learning and interlateral transfer of learning. The interlateral transfer of learning from the right to the left hand was explained by the principle of trainability.

Equilíbrio dinâmico em adolescentes com Síndrome de Down e adolescentes com desenvolvimento típico

The present study analyzed the dynamic balance of teenagers with Down syndrome (DS) and teenagers with typical development (TD). Fourteen 14 teenagers with DS and 22 teenagers with typical development (TD) performed the task of trying to keep their balance on a unstable platform. Balance was analyzed in conditions with and without vision, in the bipodal basis of support with the parallels feet and semi-tandem. Both groups showed a worse performance in the conditions with no vision. However, the teenagers with DS showed greater instability in the dynamic balance in comparison to the teenagers with TD for both, vision and non-vision conditions. Such results were explained by the characteristics normally verified in people with DS, such as: muscular hypotonic, ligamentous laxity, and the difficulty in the action-perception integration.

Troca velocidade-acurácia em tarefa de contornar figuras geométricas

O presente estudo analisou o paradigma da relacao inversa velocidade-acuracia, atraves da lei de Fitts, em tarefas de contornar figuras geometricas. Um software especialmente desenvolvido permitiu manipular a forma (quadrado, triângulo e diamante) e o tamanho da figura (perimetro e numero de voltas para contorna-la), e a espessura da linha, fornecendo indices de dificuldade (ID) entre 2,32 e 8,46 bits. Foi verificada a robustez da lei de Fitts na tarefa de contornar figuras geometricas. Ademais, foi sugerido que, em analises que contemplem o numero de repeticao da tarefa (por exemplo: com movimentos discretos e ciclicos), o indice de dificuldade pode ser calculado a partir do numero de tentativas, apresentando uma relacao TM x ID exponencial ao inves de linear.

Speed-accuracy trade-off in task of drawing geometric figures

O presente estudo analisou o paradigma da relacao inversa velocidade-acuracia, atraves da lei de Fitts, em tarefas de contornar figuras geometricas. Um software especialmente desenvolvido permitiu manipular a forma (quadrado, triângulo e diamante) e o tamanho da figura (perimetro e numero de voltas para contorna-la), e a espessura da linha, fornecendo indices de dificuldade (ID) entre 2,32 e 8,46 bits. Foi verificada a robustez da lei de Fitts na tarefa de contornar figuras geometricas. Ademais, foi sugerido que, em analises que contemplem o numero de repeticao da tarefa (por exemplo: com movimentos discretos e ciclicos), o indice de dificuldade pode ser calculado a partir do numero de tentativas, apresentando uma relacao TM x ID exponencial ao inves de linear.

Relación velocidad-precisión en las tareas del dibujar cifras geométricas

O presente estudo analisou o paradigma da relacao inversa velocidade-acuracia, atraves da lei de Fitts, em tarefas de contornar figuras geometricas. Um software especialmente desenvolvido permitiu manipular a forma (quadrado, triângulo e diamante) e o tamanho da figura (perimetro e numero de voltas para contorna-la), e a espessura da linha, fornecendo indices de dificuldade (ID) entre 2,32 e 8,46 bits. Foi verificada a robustez da lei de Fitts na tarefa de contornar figuras geometricas. Ademais, foi sugerido que, em analises que contemplem o numero de repeticao da tarefa (por exemplo: com movimentos discretos e ciclicos), o indice de dificuldade pode ser calculado a partir do numero de tentativas, apresentando uma relacao TM x ID exponencial ao inves de linear.

The effect of basketball wheelchair prescription over the performance of the modality players

It was analyzed the athletic performance in basketball players using wheelchairs prescribed (specific) and not prescribed (non-specific) according to the particularity of each player. Six wheelchair basketball players performed the 20 meters speed test (with and without dribbling a ball), and the agility test without dribbling a ball. Scales of effort and comfort were used after each test. It was verified better performance (P<0,05) and comfort (P<0,05) in the tests performed with the use of the prescribed wheelchair. Therefore, it was suggested that the use of prescribed wheelchair specially designed for each athlete, for the optimization of their performance and comfort in the basketball wheelchair sport.

El efecto de la prescripción de silla de ruedas del baloncesto en el rendimiento deportivo

It was analyzed the athletic performance in basketball players using wheelchairs prescribed (specific) and not prescribed (non-specific) according to the particularity of each player. Six wheelchair basketball players performed the 20 meters speed test (with and without dribbling a ball), and the agility test without dribbling a ball. Scales of effort and comfort were used after each test. It was verified better performance (P<0,05) and comfort (P<0,05) in the tests performed with the use of the prescribed wheelchair. Therefore, it was suggested that the use of prescribed wheelchair specially designed for each athlete, for the optimization of their performance and comfort in the basketball wheelchair sport.