Assessment of sleep disorders and proposed percentiles for adolescents

Objectives. The objectives of this study included: a) to develop a valid and reliable self-reporting instrument to assess sleep disorders among Chilean adolescent students and b) to develop percentiles for age and sex. Methodology. This was a descriptive, cross-sectional study in 2310 adolescent students conducted in the Maule Region, Chile. The sleep disorder self-report was developed considering five categories: duration, alterations, breathing problems, fatigue, and stimulant use. The instrument was validated using a confirmatory factor analysis. Reliability was assessed based on internal consistency. Percentiles were developed using the LMS method (L: lambda, asymmetry; M: mu, median; S: sigma, coefficient of variation). Results. Questions 3, 9, and 12 showed saturation values below 0.40, while the rest had saturation values above 0.41. The Kaiser-Meyer-Olkin measure of adequacy was 0.749 and the test of sphericity X-2 was 4790.09; the percentage of variance accounted for 62.1 %. Cronbach's alpha ranged between 0.71 and 0.76. Conclusion. The self-report developed to measure sleep disorders in adolescents is valid and reliable for its use in health, education, and sports science programs. Percentiles should be used to identify normal patterns and/or sleep disorders by sex and age.1172738

Jovens praticantes de atletismo: contribuição da maturação e variáveis antropométricas no desenvolvimento da força explosiva e velocidade em púberes e pós-púberes durante cinco meses de treinamento

O objetivo do estudo é estimar a contribuição dos estatutos maturacionais, na variação do percentual de gordura, peso e estatura, como também na variação dos desempenhos de força explosiva, força explosiva elástica e força explosiva elástica reflexa e velocidade em jovens atletas de atletismo de ambos os sexos, no período de cinco meses de treinamento. Os atletas foram divididos segundo o sexo e estagio maturacional. Cada jogador foi submetido a uma bateria de testes motores, bem como a avaliação da composição corporal e auto-avaliação de maturação pelo teste de Tanner. Concluiu-se que ocorrem alterações distintas dependendo da variável estudada, gênero e estagio de maturação do atleta. As variáveis antropométricas variaram de acordo com o que ocorre no processo de maturação normal de indivíduos na fase púbere e pós-púberes

Physical fitness in young Chilean soccer and non-football players by chronological age and maturity stage

Durante el periodo de la adolescencia se producen cambios en el crecimiento y la composición corporal, siendo importante identificar las diferencias individuales de madurez entre los adolescentes. En el caso de los futbolistas, estos podrían evidenciar mejor aptitud física que sus similares no-futbolistas. El objetivo consiste en comparar la aptitud física de jóvenes futbolistas vs no futbolistas, según edad cronológica y estado de madurez.During the adolescent period, changes ingrowth and body composition occur, and it is important toidentify individual differences in maturity among adolescents. In the case of soccer players, they may show better physicalfitness than their non-football players. The aim is to compare the physical fitness of young soccer players vs non-football players, according to chronologicalage and maturity status.Ciencias de la Actividad Física y del Deport

Corridas de velocidade : compração de resultados do campeonato brasileiro juvenil 2002 e do Campeonato Mundial Juvenil 2002

As categorias de base do esporte, servem de meio para se entender a realidade do esporte nacional. Observa-se que o Atletismo, e principalmente as categorias de base desse esporte, vem sofrendo com a falta de estudos que mostrem a real situação que encontra-se o esporte. Através disso, estudou-se as provas de velocidade nos Campeonatos Brasileiro Juvenil de Atletismo 2002 e Mundial Juvenil de Atletismo 2002. Primeiramente foi caracterizado um referencial teórico sobre a capacidade física de Velocidade, suas formas de expressão, seus componentes e sua manifestação como capacidade motora. Foi também preciso, foi descrever a estrutura de ambos os campeonatos, como foram selecionados os participantes, como foram realizadas as provas, como obteve-se os resultados e a metodologia utilizada para interpretação desses resultados (cálculo da velocidade média e desvio padião). A observação dos gráficos permitiu analisar e comparar as provas. Dessa forma, concluiu-se como apresentaram-se os resultados brasileiros comparativamente aos resultados mundiais.Não informado

Fat-free mass and maturity status are determinants of physical fitness performance in schoolchildren and adolescents

Objectives: The objective of the study was to verify whether (FFM), maturity status (MS) and chronological age (CA) are determinants of physical fitness performance, and to analyze FFM and physical performance aligned by CA and MS in children and adolescents. Methods: A descriptive correlational study was carried out in 863 schoolchildren. Weight, height, and waist circumference (WC) were evaluated. Body mass index (BMI), FFM, fat mass (FM), MS (Age at peak height velocity, APHV) were calculated. The physical tests of velocity 20 m, agility 5 m x 10rep, and horizontal jump (HJ) were evaluated. Results: The APHV was estimated in boys at 14.0 ± 0.36APHV and in girls at 11.96 ± 0.49APHV. The relationships between CA and APHV with FFM was r = 0.80 in boys and r = 0.44 to 0.45 in girls. The relationships between FFM and physical tests in boys were [HJ (r = 0.70), agility 5m x 10rep (r = -0.68), velocity (r = -0.61)] and in girls [HJ (r = 0.42), agility 5m x 10rep (r = -0.52), velocity (r = -0.20)]. The differences in FFM and physical fitness tests were more pronounced when aligned by APHV than by CA. Conclusion: It was verified that both FFM, CA, and APHV are determinants of physical fitness performance. In addition, the APHV should be introduced in physical education as a means of ranking physical performance among schoolchildren

Body surface area is a predictor of maturity status in school children and adolescents

Abstract Background Generally, Body surface area (BSA) changes significantly during growth and maturation. These increases portend a possible relationship between body size as determined by BSA with maturational status in children and adolescents. Objective To determine the relationship between maturity status (MS) obtained by non-invasive anthropometric methods and body surface area (BSA) in children and adolescents of both sexes in a regional population of Chile. Additionally, we sought to verify the type of linear or nonlinear relationship between MS and BSA in both sexes. Methods A descriptive (cross-sectional) study was designed in 950 children and adolescents of both sexes (539 males and 411 females). The age range ranged from 6.0 to 17.9 years. Anthropometric measurements were evaluated: body weight, standing height, sitting height. MS was assessed by means of two non-invasive anthropometric techniques. Both techniques predict peak years of growth velocity (APHV) through a regression equation for each sex. BSA (m2) was estimated by means of the Haycock equation. Results The R2 in the linear model is relatively lower (R2 = 0.80 to 0.89 in males and 0.74 to 0.66 in females) in relation to the nonlinear quadratic model (R2 = 0.81 in males and 0.76 to 0.69). The quadratic nonlinear quadratic model reflected an adequate fit (RMSE) for the data set, being in men (RMSE = 1.080 and 1.125), while in women (RMSE = 1.779 and 1.479). Conclusion BSA is positively associated with MS determined by two non-invasive methods in Chilean children and adolescents: The nonlinear quadratic model was a better fit to the data distribution. The results suggest the use of BSA as a possible predictor of maturity status in Chilean youth

Prediction of fat-free mass from body surface area in young basketball players

Abstract Background Fat Free Mass (FFM) is an important and essential indicator in various sports populations, since greater muscle and bone mass generates greater strength, endurance and speed in athletes. Objective The purpose of the study was to validate Body Surface Area (BSA) as an anthropometric indicator to estimate FFM in young basketball players. Methods A descriptive cross-sectional study was carried out in 105 male basketball players of the Brazilian Basketball Confederation of Sao Paulo (Campinas), Brazil. The age range was 11 to 15 years. Weight and height were evaluated. BSA, body mass index (BMI) and maturity status (MS) were calculated. Total body scanning was performed by dual X-ray absorptiometry (DXA). The components were extracted: Fat mass (FM), Fat free mass (FFM), percentage of fat mass (%FM) and bone mass (BM). The data were analyzed using the correlation coefficient of concordance (CCC) in terms of precision and accuracy. Results Three regression equations were generated: equation 1 had age and body weight as predictors [FFM= -30.059+(2.926*age)+(0.625*Weight)] (R2 = 92%, precision = 0.96 and accuracy = 0.99), equation 2 used age and BSA [FFM=-45.719+(1.934*age)+(39.388*BSA)] (R2 = 94%, precision = 0.97 and accuracy = 0.99) and equation 3 was based on APHV and BSA [FFM=-15.284+(1.765*APHV)+(37.610*(BSA)] (R2 = 94%, precision = 0.96 and accuracy = 0.99). Conclusions The results suggest the use of anthropometric equation using decimal age and BSA to estimate FFM in young basketball players. This new method developed can be used to design, evaluate and control training programs and monitor the weight status of athletes

Temas relevantes sobre o Estatuto da Pessoa com Deficiência: reflexos no ordenamento jurídico brasileiro

- Divulgação dos SUMÁRIOS das obras recentemente incorporadas ao acervo da Biblioteca Ministro Oscar Saraiva do STJ. Em respeito à Lei de Direitos Autorais, não disponibilizamos a obra na íntegra.- Localização na estante: 34-056.2(81) T278r- Cézar Fiuza é organizador da obra.- Marcelo Rodrigues da Silva e Roberto Alves de Oliveira Filho são os coordenadores da obra