Júlio B. Mello

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Verified

Júlio verified their affiliation via an institutional email.

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• Doctor of Human Movement Science (children fitness and bone health)
• Professor (Associate) at Pontifical Catholic University of Valparaíso

Objective The objective of this study was to map the instruments used to assess parental support for physical activity and their constructs and psychometric properties. Data source A scoping review was conducted, with searches in seven electronic databases and reference lists, covering articles available until April 2022. Original and cross-sectio...

Introduction: Various studies have used the 20-meter shuttle run test to estimate cardiorespiratory fitness in different population groups, aiming to associate test performance with the physiological, psychosocial, and cognitive health of children and young people. However, to date, no bibliometric review study has been found that analyzes the rese...

Purpose: To identify patterns in the “Fat but Fit” paradox and its impact on cognitive performance and academic achievement in Chilean adolescents. This paradox suggests that better physical fitness may mitigate the negative effects of excess adiposity. Methods: A cross-sectional study, part of the Cogni-Action Project, included 1,296 adolescents (...

Background Physical fitness has been considered an important health indicator. Several factors can impact the increase in physical fitness in children and adolescents, including chronological age, sex and BMI, in addition to training variables such as weekly frequency, session and intervention duration, and types of exercises performed. To know the...

Objective This study aimed to assess associations between chronotype and obesity‐related indicators in a sample of Spanish adolescents. Methods This cross‐sectional study used data from The Eating Healthy and Daily Life Activities (EHDLA) Study, which included a representative sample of adolescents from Spain. A total of 820 adolescents (54.7% gir...

Citation: Sá Filho, A.S.; Bittar, R.D.; Inacio, P.A.; Mello, J.B.; Oliveira-Silva, I.; Leonardo, P.S.; Chiappa, G.R.; Lopes-Martins, R.A.B.; Santos, T.M.; Sales, M.M. Impact of High-Intensity Interval Training on Different Slopes on Aerobic Performance: A Randomized Controlled Trial. Appl. Sci. 2024, 14, 9699. https://doi. Abstract: This study inve...

Relational database models offer a pathway for the storage, standardization, and analysis of factors influencing national sports development. While existing research delves into the factors linked with sporting success, there remains an unexplored avenue for the design of databases that seamlessly integrate quantitative analyses of these factors. T...

Background Considering that school environments are important and have the potential to promote an active lifestyle with direct impacts on physical, motor, cognitive, affective, and psychological aspects, the objective of this study was to evaluate the effect of a physical exercise program in the school context. Methods A parallel, two-arm experim...

This study investigated the impact of six high-intensity interval training (HIIT) running sessions at 1% or 10% slope on various physiological and performance parameters in 25 men. The partic-ipants underwent assessments of VO2max, time to exhaustion at 1% slope (TLim1%), and time to exhaustion at 10% slope (TLim10%) in the initial three visits. Th...

Background/Objectives: This study aimed to compare the effects of Xbox Kinect Sports (XKS) regarding Nintendo Switch Sports (NSS) and an inactive control group (CG) on body composition (body fat percentage, BFP; and fat-free mass) and physical performance (maximal isometric handgrip strength, MIHS; 30-s chair stand, 30-S; timed up-and-go, TUG; sit-...

Introduction: Despite the vast evidence on different risk factors and their associations with behaviours that affect the development of young people, there is still a gap in the literature, the evidence bases that ad-dresses the components of health in an integral way. Objective: The present study aims to propose a combined indicator with the inten...

This study aimed to examine the relative age effect on muscle power in a large sample of Brazilian children and adolescents. The sample consisted of 87,766 girls and boys aged 7-16 years, data collected in repeated cross-sectional surveillance carried out since 1999. The participants were grouped into four age subgroups within each chronological ag...

Purpose: To describe the effects of two interventions, regular Physical Education classes plus free active break times and school Physical Education plus Slackline classes during free time, on the attention of schoolchildren. Methods: This is a quasi-experimental study with a quantitative approach. Two groups participated in the interventions: body...

This article aims to present growth curves for height, weight, and BMI of 95,000 Brazilian youths aged 6 to 17 years, including the five regions of the country, the Amazon region, and indigenous populations, and compare them with the World Health Organization (WHO) growth references. The final sample consisted of 52,729 boys and 42,731 girls from t...

Purpose To examine which key body size characteristics are common to success when performing a variety of physical fitness tests and, at the same time, to identify further characteristics that benefit only specific fitness tests. Methods Cross-sectional study carried out with data from 94,484 6–18 year olds. The physical fitness tests were: 1) 20-...

Resumen. El objetivo del estudio fue revisar en la literatura cuáles son las barreras socioculturales y de género para la práctica de actividad física de niños y adolescentes y como pueden influir en el desarrollo de un estilo de vida activo. Se realizó una scoping review para ofrecer una visión exploratoria de la literatura y se llevó a cabo utili...

Resumen. El presente artículo pone en reflexión algunas cuestiones propias de las lógicas hegemónicas adultocéntricas de una educación física tradicional que ha permeado el mundo de las infancias, donde prevalece un enfoque mecanizado de la disciplina, con una estructura de la clase fundamentada en la curva fisiológica del esfuerzo, donde el contro...

Summary Background Underweight and obesity are associated with adverse health outcomes throughout the life course. We estimated the individual and combined prevalence of underweight or thinness and obesity, and their changes, from 1990 to 2022 for adults and school-aged children and adolescents in 200 countries and territories. Methods We used data...

Aim To determine the prevalence of adolescents who meet muscle‐strengthening activities (MSA) recommendation and their associations with anthropometric variables, physical fitness, and lifestyle behaviours in a sample of Spanish adolescents aged 12–17 years. Methods This was a cross‐sectional study using data from The Eating Healthy and Daily Life...

Puntos destacables:El entrenamiento de fuerza para niños, niñas y adolescentes (NNA) es una práctica saludable y proporciona muchos beneficios para la salud.El entrenamiento de fuerza para NNA es una estrategia segura y lúdica, atendiendo a las principales exigencias de la prescripción de ejercicio pediátrico.Existen diferentes estrategias para apl...

A prática profissional do futebol feminino no Brasil vem se expandindo. Essa expansão incentivou a surgimento de categorias de base nas equipes. Com isso, investigar a diferença entre o perfil das jogadoras profissionais e das categorias de base se torna importante para realizar uma melhor transição entre as categorias. Assim, o objetivo do estudo...

The aim of this research was to determine the relationship between horizontal jump performance and sprint performance according with the sprint levels of children and adolescents. This study is a cross-sectional analysis from PROESP-Br database with 77,384 children and adolescents with an age range of 6–18 years. We use data about the horizontal ju...

Background There has been a decline in children's physical fitness in recent decades. Such concerns are largely based on evidence from North America, Europe, and Asia. The current study describes the secular trend and variation (spread) in the physical fitness scores of young Brazilians from 2005 to 2022. Methods This study is a repeated, cross‐se...

This study investigates the relationship between social support and moderate to vigorous physical activity, as well as the possible relationships between social support and socioeconomic status, gender and body mass index. Cross-sectional study with a non-randomized sample of 71 students (boys and girls) aged 7 to 12 and their parents or legal guar...

Aim: To promote the practice of physical activity (PA) after school hours and verify the effects on the physical fitness and academic performance of children with socioeconomic vulnerability. Methods: The non-randomized experimental study was carried out in a school in a vulnerable area. Eighteen children performed 60 minutes of moderate-vigorous P...

Background: There is still little understanding of the associations between physical fitness variables and bone health in children taking into account key confounders. Aim: The aim of this study was to analyze the associations between performance in tests of speed, agility, and musculoskeletal fitness (power of the upper and lower limbs) with bone...

Aims: To identify the effects of an intervention in Physical Educationclasses and handball training on health-related physical fitness in adolescent girls.Methods: This is a quasi-experimental study with 26 girls (10 to 16 years old).Girls who reached 75% of participation in handball training (HT) (n= 12) composed the HT group.Girls who played only...

Purpose : Our objective is to describe the moderating effect of the level of gross motor development on the relationship between physical activity (PA) level and visual perception/memory in girls. Methods : This is a quantitative cross-sectional study with a randomized sample of 85 girls (mean age 7.11 ± 0.74) from Chile. The following models were...

Recent systematic reviews point out the positive acute effects of physical activity on executive functions in children and adolescents, but the chronic effects in this age group are still uncertain. This study aims to describe a systematic review with meta-analysis protocol to elucidate the chronic effects of physical activity at school on the exec...

This quasi-experimental study evaluated the effects of two physical exercise programs offered in the context of physical education classes on physical fitness indicators. The convenience sample consisted of 91 students aged 9-12 years who formed the group's Body Training (GBT; 45 students) and Physical Education (PE; 45 students). Body mass index (...

Background: The possibility of carrying out screening, with acceptable accuracy, of a child’s bone mass status based on a physical fitness test can advance the concept of health-related physical fitness. In addition, the relevance of the applicability of this type of screening in educational environments is mainly due to the difficulty of direct as...

Background Excess adipose tissue negatively influences bone health during childhood, affecting future bone fragility diseases such as osteoporosis. However, little is known about how adolescent appendicular skeletal muscle mass index (ASMI) may mediate the relation between fatness and bone mineral content (BMC). Methods The sample comprised 1,296...

A adoção de um estilo de vida ativo se desenvolve a partir das oportunidades e das experiências de movimento das pessoas, sendo que as vivenciadas no ambiente escolar são de capital importância, pois desde a Constituição Federal de 1988, art. 205. “A educação, direito de todos e dever do Estado e da família (...).” A lei Nº 9.394/1996, que estabele...

Este estudo quase-experimental avaliou os efeitos de dois programas de exercício físico, ofertado no contexto das aulas de Educação Física escolar, sobre indicadores de aptidão física. A amostra por conveniência foi composta por 91 alunos com idades entre 9-12 anos que formaram os grupos Formação Corporal (PFC; 45 alunos) e Educação Física (PEF; 45...

Background: This article presents the recommendations from the Physical Activity Guidelines for the Brazilian Population. Methods: A steering committee composed of a chair, 6 experts in physical activity, and representatives from the Ministry of Health/Brazil, Pan American Health Organization, Brazilian Society of Physical Activity and Health desig...

Background: This article describes the process and methods used in the development of the first ever Physical Activity Guidelines for the Brazilian Population. Methods: The steering committee established 8 working groups based on other guidelines and the Brazilian agenda for public health and physical activity (PA) promotion: (1) understanding PA;...

Background Strength training (ST) uses different training methods, such as free weights, body weight, elastic bands or machines to generate resistance force. There is evidence of the ST benefits, however, many professionals have resistance about the applicability of this type of training for children and adolescents, especially at schools. Purpose...

Introduction: Hosting mega-sport events can be an important political strategy for promoting the sport. Brazil had a decade with different mega-sport events, so we want to highlight how many Brazilian young people have been practicing sports throughout this period. Methods: This secular trend was attended by over 37.000 young people during January...

The practice of regular physical activity is associated with a series of physiological benefits at all stages of life (Warburton et al., 2006; Warburton & Bredin, 2017). However, recently, Piggin (2020) questioned how much physical activity should be observed only from the perspective of energy expenditure and effects on the body, thinking it as so...

Background There is a general lack of information about how insufficient physical activity impacts blood pressure and physical fitness in Latin-American ethnic minorities. Aims To describe the interactions between insufficient physical activity, blood pressure, and physical fitness outcomes in Latin-American schoolchildren of different ethnicity....

Resumo: O número de crianças e adolescentes com índice de sobrepeso e obesidade está aumentando. Já é consolidado que o baixo condicionamento cardiorrespiratório tem relação com riscos cardiovasculares e metabólicos. O objetivo desse trabalho é avaliar o nível de condicionamento cardiorrespiratório em adolescentes do ensino médio e relacionar com i...

Introduction: Futsal is a sport that requires nutritional support to support the high-energy expenditure and significant loss of fluids and electrolytes during training and matches. It is important that high-level athletes follow appropriate, evidence-based nutrition. To our knowledge, there is a lack of data on the eating habits and nutrition know...

This systematic review and meta-analysis aimed to evaluate the effectiveness of interventions through Physical Education (PE) exercises on bone mineral content (BMC) and density (BMD) of children and adolescents. The research was conducted using the online electronic databases PubMed, Science Direct, Web of Science and Scopus (March 2021). The anal...

Regular physical activity promotes physiological, psychological and social benefits in the lives of children and adolescents. Despite the high prevalence of young people who do not physically activity in our country, and that we have a good ranking in world academic production on research in the physical activity and health area, Brazilian recommen...

A atividade física é importante para o pleno desenvolvimento humano e deve ser praticada em todas as fases da vida e em diversos momentos, como ao se deslocar de um lugar para outro, durante o trabalho ou estudo, ao realizar tarefas domésticas ou durante o tempo livre. Quanto mais cedo a atividade física é incentivada e se torna um hábito na sua...

Note: This work is organized by the Ministry of Health of Brazil in partnership with the Federal University of Pelotas / Brazil. The researchers listed as authors here were responsible for preparing chapter 3 - PHYSICAL ACTIVITY FOR CHILDREN AND YOUTH FROM 6 TO 17 YEARS OLD. These Guidelines present physical activity recommendations for all ages...

Introdução: A prática de atividade física (AF) regular e a manutenção de bons níveis de aptidão física têm sido relacionadas ao menor risco de desenvolver diferentes problemas de saúde, tais como hipertensão arterial, síndrome metabólica e diabetes tipo 2.Portanto, examinar se há relação entre a educação física, aptidão física e fatores de risco ca...

Background: Evidence points to anthropometric and fitness variables as associated factors with children's blood pressure. Analysing these factors in a single context is a relevant possibility of identifying the weight that each factor can present for the development of arterial hypertension. Objective: Identify the possible associations between...

O Projeto Esporte Brasil (PROESP-BR) é um observatório permanente de indicadores de crescimento e desenvolvimento corporal, motor e do estado nutricional de crianças e jovens entre 6 e 17 anos. Com o objetivo de auxiliar os professores de educação física na avaliação desses indicadores, o PROESP-BR propõe, através de um método, a realização de prog...

Objetivo: O objetivo do presente estudo foi identificar as associações das variáveis individuais e ambientais do contexto escolar com a aptidão cardiorrespiratória de adolescentes. Métodos: Estudo do tipo associativo, com abordagem quantitativa e corte transversal. Foi selecionada uma amostra de escolares do ensino médio da zona sul de Porto Alegre...

Aim: The purpose of this study is to verify the association between sprint, lower limb power, and change of direction speed in schoolchildren. Method: This is a cross-sectional school-based study with a probabilistic sample (n=1455) of adolescents aged 10-17 years. The variables were: sex, chronological age, body mass, height, skinfold sum, maturi...

Background: In spite of wide international evidence about cardiorespiratory fitness (CRF) and adiposity in association with cardiovascular disease, there is poor evidence about this relationship in schoolchildren of ethnic minorities. Aim: To examine the relationship between CRF and body composition on blood pressure (BP) in a sample of ethnic mino...

The aim of this study was to examine the biological and urban environment variables that associate with physical activity (PA) in adolescents. After this, to examine the interrelationship between biological, urban environment variables and PA in structural equation analysis. This was a cross-sectional study with an adolescents’ randomized sample. M...

Since 1994, the Projeto Esporte Brasil (PROESP-Br) battery tests has been used to evaluate health- and skill-related physical fitness among aged 6-17 Brazilian schoolchildren. The aim of this study was to delineate the Brazilian children and youth’s physical fitness profile from a systematic review over studies that used the PROESP-Br proposal. The...

This study aimed to analyze the associations between different domains of physical activity (PA) and nonspecific low back pain in adolescents. A school-based study with adolescents randomly selected from a city in the south Brazil. Analyzed variables were nonspecific low back pain, different domains of PA (commuting to school, participation on phys...

A presentation about physical fitness, exercise prescription and effects in health in young people.

Os objetivos desta tese são: 1) verificar as associações entre o desempenho nos testes de velocidade, agilidade e potência de membros superiores e inferiores e indicadores de saúde óssea em crianças; 2) propor pontos de corte para o desempenho nos testes de aptidão física para a identificação do estado de saúde óssea de crianças; e 3) descrever o p...

Fundamento: Evidências apontam variáveis antropométricas e de condicionamento físico como fatores associados à pressão arterial infantil. Analisá-los em apenas um contexto é um meio relevante de identificar o peso que cada um deles pode apresentar no desenvolvimento da hipertensão arterial. Objetivo: Identificar as possíveis associações de medidas...

Background: Criterion-referenced cut-points for field-based aerobic fitness for children and adolescents are lacking. This study aimed to determine the associations between aerobic fitness and obesity to propose criterion-referenced cut-points for boys and girls (6–17 years). Methods: A total of 61,465 children and adolescents aged 11.2 ± 2.0 years...

Objetivo: O objetivo deste estudo foi de verificar se há correlação entre dismorfia muscular, dependência de exercício e overtraining em praticantes de musculação. Método: Participaram do estudo 320 sujeitos, maiores de idade, praticantes de musculação há, pelo menos, três meses, com freqüência mínima de três treinos semanais, de dez diferentes aca...

Aim: To verify the associations between organized physical activity out of school (PA) and cardiorespiratory fitness (CRF) with indicators of mental health in children. Methods: This is a cross-sectional study, with a sample of 226 students (47% girls) of public school in the south of Brazil aged between 6 to 11 years-old (8.36 ± 1.46). The cardio...

Aim Regular physical activity and/or sports practice play an important role in peak bone mass. However, the role of different physical-sportive approaches on bone health is not fully understood, especially in low-income children. The aim of this study was to analyze the changes in bone markers (bone mineral density–BMD and bone metabolism) promoted...

Objetivo: O objetivo deste estudo é descrever a prevalência de crianças na zona saudável e risco para a atividade física e do apoio familiar percebido de acordo com o sexo e identificar as relações entre a atividade física diária e o apoio familiar percebido. Método: Trata-se de um estudo exploratório, com amostra voluntária de 49 crianças matricul...

Moderate to vigorous physical activity plays a recognized osteogenic effect on bone. Moreover, sedentary time, and fat accumulation are unfavorable to bone health. Our study aimed (1) to examine changes in body composition, bone tissue, physical activity, and sedentary time; and (2) to explore whether changes in physical activity intensities and in...

O objetivo deste estudo foi descrever os níveis de intensidade das aulas de Educação Física de escolares do ensino fundamental. Trata-se de uma pesquisa exploratória com abordagem quantitativa e corte transversal. A escola foi selecionada por conveniência. Foram avaliadas 11 aulas, de uma turma do oitavo ano. As variáveis do estudo foram: as ativid...

Introdução: A aptidão física tem sido considerada uma medida de fácil acesso para o rastreamento de escolares com risco à saúde.Objetivo: Verificar a prevalência de sobrepeso e obesidade e as possíveis associações com os indicadores de risco cardiometabólico e musculoesquelético de crianças.Materiais e Métodos: Estudo transversal composto por 320 c...

The research aim to assess the trend of the health-related physical fitness over a period comprising 2008-2014, in two cohorts of a voluntary Brazilian school aged children and adolescents. Data was obtained from the database of Project Sport Brazil. The sample comprised children and adolescents aged between 10-17 years, assessed in two cohorts: 20...

Objective: to identify associations between existence of public spaces and distance from home to a public space, characteristics of the structures available for physical activity (PA) and quality of the structures associated with daily PA among Brazilian adolescents. Method: cross-sectional study. A convenient sample of 176 adolescents (14-18 years...

The production of knowledge plays a key role in the creation, sharing, integration and construction of knowledge. In relation to mega events this production still needs some tweaking as the organization and standardization for data collection. The theme of urban infrastructure in the cities that host these mega events brings numerous questions abou...

O objetivo do estudo é identificar a associação da aptidão cardiorrespiratória (ApC) de adolescentes com a atividade física (AF) e as características pedagógicas da educação física escolar (EFi). Avaliaram‐se 236 escolares do ensino médio (90 meninos) e seus professores de EFi. Foi feito teste de corrida de seis minutos, foram usados pedômetros, qu...

Research on people with disabilities can create, per times, strangeness and discomfort. However, it is necessary to encourage and bring to the fore debates about how the lives of people with disabilities in society are thought. In this sense, this special issue brings to our readers original articles on relevant topics in health sciences and sports...

The production of knowledge plays a key role in the creation, sharing, integration and construction of knowledge. In relation to mega events this production still needs some tweaking as the organization and standardization for data collection. The theme of urban infrastructure in the cities that host these mega events brings numerous questions abou...

T h e p u r p o s e o f t h e s t u d y i s t o d e s c r i b e t h e r o l e o f s p o r t i n t h e l i f e c o u r s e o f w o m e n a t h l e t e s w i t h disabilities. As a conceptual basis it used the life course theory, which is the path taken by the individual, marked by events over time. These events have a direct link with obtaining the...

O objetivo deste estudo foi descrever a importância da gestão escolar para o professor de Educação Física e o comportamento deste como gestor. Foram entrevistados 16 professores de Educação Física de ambos os sexos da cidade de Juiz de Fora. Trata-se de um estudo com método descritivo, abordagem qualitativa e técnica narrativa. As respostas foram d...

A pratica esportiva das meninas foi menor que dos meninos durante o COL. Todavia, com a grande redução da pratica esportiva dos rapazes este percentual se igualou durante o COR. Podemos perceber que nossos jovens têm praticado esporte cada vez menos. Demonstrando que um dos indicadores de atividade física vem baixando consequentemente.

15 minutos de formação corporal foi eficaz para todo grupo de sujeitos, sugerimos que uma intervenção mais longa potencialize a chance de migrar mais alunos para a zona saudável da ApC.

Resumo – Objetivou-se verificar a associação entre as características da estrutura da escola e a atividade física dos escolares na aula de educação física e no recreio. Estudo de associação com abordagem quantitativa. A amostra aleatória é composta por 176 escolares (71 meninos e 105 meninas) de 10 escolas estaduais de ensino médio da cidade de Pas...

Resumo The aim of this study was to verify the effect of an intervention program during Physical Education (PE) classes on levels of physical fitness related to health in youth. This is a pre-experimental study. The students (40 boys and 48 girls) were conveniently selected from a private school in Southern Brazil. Cardiorespiratory fitness was as...

DOI: http://dx.doi.org/10.5007/1980-0037.2016v18n6p658 The aim of this study was to outline the physical fitness profile related to sport performance of Brazilian children and adolescents, stratified by sex. This is a descriptive cross-sectional study and information was obtained from the Projeto Esporte Brasil (PROESP-Br). The sample consisted of...

Method: 1,045 adolescents (51.7 % girls) aged 11-17 were randomly selected. The number of steps/day was measured using pedometers. The risk factors considered were total cholesterol, systolic and diastolic blood pressure, skinfold thickness and body mass index. The receiver operating characteristics (ROC) curve was used to analyze data. Results: R...