DEVELOPMENT AND VALIDATION OF A DEVICE FOR MEASURING FLEXIBILITY THROUGH ACCELEROMETER IN CHILDREN / DESARROLLO Y VALIDACIÓN DE UN DISPOSITIVO PARA MEDIR LA FLEXIBILIDAD MEDIANTE ACELERÓMETRO EN NIÑOS / DESENVOLVIMENTO E VALIDAÇÃO DE UM DISPOSITIVO PARA MENSURAÇÃO DA FLEXIBILIDADE POR MEIO DO ACELERÔMETRO EM CRIANÇAS

The objectives of this study were to develop and validate a computerized device to measure joint flexibility; to measure flexibility in children in elementary school aged 8 to 10 years using the Wells bank; to compare the data obtained by the Wells bank and the computerized device developed in the present study and evaluate the usability of the device. 215 volunteers participated in this research, aged between 8 and 10 years, 63.72% (137) were female and 36.28% (78) were male, duly enrolled in an educational institution in the Alto Tietê region. For data collection, the volunteers performed the flexibility test using the Wells bank and the computerized device developed in this research to assess flexibility. The computerized device it was made on a 3D printing technology printer. A usability evaluation was carried out with 15 Physical Education teachers for the product developed through a usability questionnaire based on the System Usability Scale (SUS) form, which contains 10 multiple-choice questions. The data obtained by the objective measures determined were evaluated in terms of frequency, mean and standard deviation. The arithmetic means of the three measurements performed at each stage were calculated. Mann-Whitney and Kruskal-Wallis tests and Spearman's correlation were performed for the investigation. For all analyses, significant differences were considered p<0.05. It is concluded that the computerized device to measure joint flexibility is capable of evaluating the range of motion in degrees, and was qualified as easy to handle by professionals in the field of physical education.

Los objetivos de este estudio fueron desarrollar y validar un dispositivo computarizado para medir la flexibilidad articular; medir la flexibilidad en niños en la escuela primaria de 8 a 10 años a través del banco Wells; comparar los datos obtenidos por la base de datos Wells y el dispositivo computarizado desarrollado en el presente estudio y evaluar la usabilidad del dispositivo. Un total de 215 voluntarios participaron en esta investigación, con edades de 8 a 10 años, 63,72% (137) mujeres y 36,28% (78) hombres, debidamente matriculados en una institución educativa de la región del Alto Tietê. Para la recolección de datos, los voluntarios realizaron la prueba de flexibilidad utilizando la base de datos Wells y el dispositivo computarizado desarrollado en esta investigación para evaluar la flexibilidad. El dispositivo fue hecho de una impresora de tecnología de impresión 3D. Se realizó una evaluación de usabilidad con 15 profesores de Educación Física para el producto desarrollado a través del cuestionario de usabilidad basado en el formulario System Usability Scale (SUS) que contiene 10 preguntas de opción múltiple. Los datos obtenidos por las mediciones objetivas determinadas fueron evaluados para la frecuencia, media y desviación estándar. Se calcularon las medias aritméticas de las tres mediciones realizadas en cada etapa. Las pruebas de Mann-Whitney y Kruskal-Wallis y la correlación de Spearman se realizaron para la investigación. Para todos los análisis, se consideraron diferencias significativas p<0,05. Se concluye que el dispositivo computarizado para medir la flexibilidad articular es capaz de evaluar el rango de movimiento en grados, y fue calificado fácil de manejar por profesionales de la educación física.

Os objetivos deste estudo foram desenvolver e validar um dispositivo computadorizado para mensurar a flexibilidade articular; mensurar a flexibilidade em crianças no ensino fundamental de 8 a 10 anos por meio do banco de Wells; comparar os dados alcançados pelo banco de Wells e o dispositivo computadorizado desenvolvido no presente estudo e avaliar a usabilidade do dispositivo. Participaram desta pesquisa 215 voluntários, com idade de 8 a 10 anos, sendo 63,72% (137) do sexo feminino e 36,28% (78) do sexo masculino, devidamente matriculados em uma instituição de ensino na região do Alto Tietê. Para coleta de dados, os voluntários realizaram o teste de flexibilidade utilizando o banco de Wells e o dispositivo computadorizado desenvolvido nessa pesquisa para avaliar a flexibilidade.O dispositivo foi confeccionado numa impressora de tecnologia de impressão 3D. Foi realizada uma avaliação da usabilidade com 15 professores de Educação Física para o produto desenvolvido através da interação de usabilidade baseada no formulário System Sustainability Scale (SUS) que contém 10 questões de múltipla-escolha. Os dados obtidos por medidas objetivas determinadas foram avaliadas quanto à frequência, média e desvio padrão. Foram seguidas como médias aritméticas das três medidas realizadas em cada etapa. Para investigar realizou-se os testes de Mann-Whitney e de Kruskal-Wallis e a tradução de Spearman. Para todas as análises foram consideradas diferenças significativas p<0,05.Conclui-se que o dispositivo computadorizado para medir a flexibilidade articular é capaz de avaliar em graus a amplitude de movimento,

Measurement of the effect of physical exercise on the concentration of individuals with ADHD.

Attention Deficit Hyperactivity Disorder (ADHD) mainly affects the academic performance of children and adolescents. In addition to bringing physical and mental health benefits, physical activity has been used to prevent and improve ADHD comorbidities; however, its effectiveness has not been quantified. In this study, the effect of physical activity on children's attention was measured using a computer game. Intense physical activity was promoted by a relay race, which requires a 5-min run without a rest interval. The proposed physical stimulus was performed with 28 volunteers: 14 with ADHD (GE-EF) and 14 without ADHD symptoms (GC-EF). After 5 min of rest, these volunteers accessed the computer game to accomplish the tasks in the shortest time possible. The computer game was also accessed by another 28 volunteers: 14 with ADHD (GE) and 14 without these symptoms (GC). The response time to solve the tasks that require attention was recorded. The results of the four groups were analyzed using D'Agostino statistical tests of normality, Kruskal-Wallis analyses of variance and post-hoc Dunn tests. The groups of volunteers with ADHD who performed exercise (GE-EF) showed improved performance for the tasks that require attention with a difference of 30.52% compared with the volunteers with ADHD who did not perform the exercise (GE). The (GE-EF) group showed similar performance (2.5% difference) with the volunteers in the (GC) group who have no ADHD symptoms and did not exercise. This study shows that intense exercise can improve the attention of children with ADHD and may help their school performance.

Proposal of a magnetic resonance technique for the evaluation of the calcaneofibular ligament minimizing false positive results.

BACKGROUND: Magnetic resonance (MR) techniques used to detect lesions of the ligament complex for articulation of the ankle lack the desired accuracy for the study of the calcaneofibular ligament (CFL). The lack of sensitivity of the conventional techniques is due to variations in the dimensions of the CFL. The best results are obtained when the image plane is oriented parallel to the ligament. This study aims to develop a model that addresses the width, length and angle parameters of the CFL and the orientation of the MR image plane, and thus determine a technique in the oblique transversal plane with the foot in anatomical flexion, that is adequate for the majority of patients. METHOD: To determine this orientation and adapt it to the majority of people, images of the articulation of the ankle in the 3D isotropic, volumetric, sagittal plane of 100 volunteers were taken using the MR technique. None of the volunteers had a clinical history of ligament lesions, serious pathologies, or surgeries. A measurement of the length, width, and angle of the CFL relative to the sole of the foot was performed using the MR tools. A virtual model was developed that simulated the visualization of the CFL in the oblique transversal image plane from 35° to 45° using the CFL dimensions of 100 volunteers. The comparison of the simulations with the reconstructed images validated the model and permitted the calculation of the agreement and sensitivity of each technique in the detection of the complete CFL. RESULTS: Using the simulator, it was possible to obtain the limit angle for complete CFL visualization as a function of its dimensions for any angle of the oblique transversal image plane of the MR. CONCLUSION: The results suggest that a single image acquisition technique in the oblique transversal plane at 38° with the foot in anatomical flexion would serve the majority of patients.