Identifying the clustering and correlates of physical activity (PA) and sedentary behavior (SB) is very important for developing appropriate lifestyle interventions for children and adolescents. This systematic review (Prospero CRD42018094826) aimed to identify PA and SB cluster patterns and their correlates among boys and girls (0–19 years). The search was carried out in five electronic databases. Cluster characteristics were extracted in accordance with authors’ descriptions by two independent reviewers and a third resolved any disagreements. Seventeen studies met the inclusion criteria and the population age ranged from six to 18 years old. Nine, twelve, and ten cluster types were identified for mixed-sex samples, boys, and girls, respectively. While girls were in clusters characterized by “Low PA Low SB” and “Low PA High SB”, the majority of boys were in clusters defined by “High PA High SB” and “High PA Low SB”. Few associations were found between sociodemographic variables and all cluster types. Boys and girls in “High PA High SB” clusters had higher BMI and obesity in most of the tested associations. In contrast, those in the “High PA Low SB” clusters presented lower BMI, waist circumference, and overweight and obesity. Different cluster patterns of PA and SB were observed in boys and girls. However, in both sexes, a better adiposity profile was found among children and adolescents in “High PA Low SB” clusters. Our results suggest that it is not enough to increase PA to manage the adiposity correlates, it is also necessary to reduce SB in this population.

This study aimed to investigate whether attitudes towards body weight dissatisfaction is associated with perceived health and impairments in sleep among a national population-based sample of Brazilian adolescents. This is a cross-sectional data from the 2015 National School-Based Health Survey (PeNSE). A total of 100.182 students (70.8% were between 14 to 15) in ninth-grade, enrolled in public and private schools were eligible for data analysis. Variables were measured using a questionnaire and binary logistic regression was used. There was association between attitudes towards body weight dissatisfaction and perceived health (not controlling weight = OR: 2.19, 95%CI: 2.00-2.40; trying to lose = OR: 1.90, 95%CI: 1.75-2.05; gain = OR: 2.22, 95%CI: 2.01-2.46; maintain = OR: 1.81, 95%CI: 1.54-2.14). Adolescents were also more likely to present impairments in sleep (not controlling weight = OR: 1.21, 95%CI: 1.11-1.32; trying to lose = OR: 1.16, 95%CI: 1.08-1.25; gain = OR: 1.43, 95%CI: 1.28-1.61; maintain = OR: 1.43, 95%CI: 1.22-2.68). Dissatisfaction is an additional concern in the daily life of adolescents, which is associated to depreciation of the quality of sleep and decrement of psychological well-being.

This paper aims to verify the association between the combined relationship of physical inactivity and sedentary behaviour (SB) at leisure‐time and the prevalence of noncommunicable chronic diseases (NCDs) in Brazilian adults and elderly. This is a cross‐sectional study, derived from the VIGITEL system, with individuals ≥18 years old (n = 52,675). The presence of NCDs (diabetes, hypertension, and obesity) and the independent variables were defined by self‐report. Binary logistic regression was used. While adults with the presence of, at least, one risky behaviour had a higher odds to have obesity (OR _{active + high SB}: 1.25; 95%CI: 1.01;1.54; OR _{inactive + low SB}: 1.47; 95%CI: 1.25;1.73; OR _{inactive + high SB}: 1.77; 95%CI: 1.47;2.12), the elderly had an increased risk for this outcome only when classified as inactive (OR _{inactive + low SB}: 1.43; 95%CI: 1.17;1.75; OR _{inactive + high SB}: 1.87; 95%CI: 1.47;2.38). Inactive adults with low SB were more likely to have diabetes (OR _{inactive + low SB}: 1.31; 95%CI: 1.00;1.71) and hypertension (OR _{inactive + low SB}: 1.26; 95%CI: 1.08;1.46), while physical inactivity was again more strongly associated with these outcomes in the elderly, for diabetes (OR _{inactive + low SB}: 1.23; 95%CI: 1.02;1.48; OR _{inactive + high SB}: 1.75; 95%CI: 1.39;2.19), and hypertension (OR _{inactive + low SB}: 1.22; 95%CI: 1.05;1.41; OR _{inactive + high SB}: 1.60; 95%CI: 1.33;1.94) Both leisure‐time behaviours carry a high risk of the prevalence of different NCDs, however, physical inactivity, isolated or combined, showed a greater association with the evaluated outcomes.Highlights This cross‐national survey included representative sample of people ≥18 years old. Adults with at least one evident risky behavior had a higher chance of obesity. Inactive adults with low sedentary behavior had higher chances for diabetes and hypertension. Physical inactivity was more strongly associated with all diseases in the elderly.

The growing interest in the study of sedentary behavior is justified by its increasing presence in people's daily lives, particularly in leisure time. The aim of this study was to compare the prevalence and factors associated with sedentary behavior derived exclusively from TV time and from its combination with the time spent using other electronic devices among Brazilian adults (n = 52,443). This cross-sectional study used data from the Vigitel survey (2019), which included subjects ≥ 18 years old who resided in the capitals of the 26 Brazilian states and Federal District. High TV time (≥ 4 h/day), and its combination with computer, tablet, or cell phone use (≥ 4 h/day), as well as sociodemographic, behavioral, and health characteristics were self-reported. Adjusted logistic regression was used to estimate odds ratios and 95% confidence intervals (95%CI). The prevalence of high sedentary behavior almost tripled when TV viewing was added to the time spent using other electronic devices (from 12.2%; 95%CI: 11.6; 12.8, to 34.7%; 95%CI: 33.8; 35.6), notably among the youngest (32.0 percentage points). Individuals living without a partner, who smoked, consumed alcohol and processed foods excessively, were physically inactive, and had hypertension were more likely to have both outcomes than their counterparts. Older and less educated individuals were more likely to spend excessive time watching TV and less likely to have high use of other electronic devices in addition to TV viewing than their peers. Including computer, tablet, or cell phone led to an increase in the prevalence of high sedentary behavior. The magnitude and direction of the associations of age and education with high sedentary behavior varied according to the method how high sedentary behavior was defined. Projects, programs, and policies must consider the different indicators of sedentary behavior in monitoring and promoting a healthier lifestyle.

O estudo teve como objetivo determinar os motivos de adesão, aderência e desistência de adultos com obesidade em um programa de intervenção de exercícios físicos. Trata-se de uma estudo descritivo com 69 adultos com obesidade, os quais estiveram envolvidos em um ensaio clínico controlado. Nos grupos de exercícios físicos, as sessões continham treinamento aeróbio e de força, totalizando 60 minutos, durante 16 semanas. Os motivos de adesão, aderência e desistência foram determinados por questionário e uma análise descritiva (quanti-qualitativa) foi realizada, de acordo com a frequência em que os motivos foram relatados pelos participantes. Verificou-se baixa aderência ao treinamento, bem como altos índices de desistência. A saúde, a qualidade de vida e a estética foram os principais motivos de adesão. Para a aderência, os aspectos mais prevalentes foram a saúde, o comprometimento e à motivação. Contudo, para a desistência, trabalho e a desmotivação foram mais relatados. É importante a intervenção profissional no campo da atividade física e saúde considere estes diferentes motivos e as mudanças neles durante o processo e direcione ações a fim de aumentar a adesão e a aderência e reduzir as desistências.