Effects of linear periodized and non-periodized combined training on body image perception of adults with obesity: A randomized clinical trial.

OBJECTIVE: Verify the effect of non-periodized and linear periodized combined training on body image perception and body dissatisfaction in adults with obesity. DESIGN: A randomized clinical trial on the effect of two types of combined training periodization was carried out on people with grade I and II obesity. SETTING: Participants were allocated into three groups: non-periodized periodization group, linear periodization group, and control group, with 23 participants in each. SUBJECTS: Adults with obesity, with a body mass index between 30 kg/m² and 40 kg/m². INTERVENTIONS: The intervention lasted 16 weeks (separated into three mesocycles of 4 weeks and 1 week of familiarization), in 3 weekly sessions of 1 hour each, composed of aerobic (30 min) and muscle strength exercises (six exercises) in the same session. The group with non-periodized model maintained uniform intensity, volume, and workload throughout the mesocycles. The group with the linear periodization model started with low initial intensity, subsequently introducing a gradual increase of intensity in the mesocycles. MAIN MEASURES: Body image perception (current and ideal silhouette) and body dissatisfaction were assessed using the Stunkard silhouette scale. RESULTS: The perception of the current silhouette increased only in the control group (Δ = 1.16; p = 0.04). There was a significant reduction in the ideal silhouette over time (p = 0.001), especially in non-periodized group (Δ = -1.26). Body dissatisfaction increased significantly only over time (p = 0.001), especially for control group (Δ = 1.47). CONCLUSIONS: Regardless of periodization, combined training effectively maintained the perception of the current silhouette and reduced the ideal silhouette in adults with obesity. TRIAL REGISTRATION: Brazilian Registry of Clinical Trials (RBR-3c7rt3).

Factors associated with perception of the current silhouette and body image dissatisfaction in adults with obesity / Fatores associados à percepção da silhueta atual e à insatisfação da imagem corporal em adultos com obesidade

ABSTRACT Objective To verify the factors associated with the perception of current silhouette and body image dissatisfaction in adults with obesity. Methods Cross-sectional study derived from the baseline of a randomized clinical trial. The perception of current silhouette and dissatisfaction with body image, defined by the difference between the perception of current and ideal silhouette, were obtained from a scale that ranged from one (smallest silhouette) to nine (largest silhouette). The independent variables investigated as associated factors (crude and adjusted linear regression) were: sex, age, skin color, body mass index (kg/m2), percentage of body fat, level of physical activity, and food intake. Results Sixty-nine obese individuals (body mass index ≥30kg/m2) were studied, 42 of whom were female and with the following mean values: 34.7 (±7.2) years; 33.5 (±2.8) kg/m2, and current silhouette of 6.6 (±0.9). All were dissatisfied with their excess body weight. The categories associated with a perception that matched the current silhouettes were male sex, white skin color, and higher body mass index values when compared to female sex, non-white, and lower body mass index values, respectively. Regarding body image dissatisfaction, white people had lower scores than those with other skin colors. Conclusion Being male, having white skin color, and having a higher body mass index were risk factors for the perception of larger body silhouettes, while only non-white skin color was associated with dissatisfaction with body image.

RESUMO Objetivo Verificar os fatores associados à percepção da silhueta atual e à insatisfação com a imagem corporal em adultos com obesidade. Métodos Estudo transversal derivado da linha de base de um ensaio clínico randomizado. A percepção de silhueta atual e a insatisfação com a imagem corporal, definida pela diferença entre a percepção da silhueta atual e da ideal, foram obtidas a partir de uma escala variando de um (menor silhueta) a nove pontos (maior silhueta). As variáveis independentes investigadas como fatores associados (regressão linear bruta e ajustada) foram: sexo, idade, cor da pele, índice de massa corporal (kg/m2), percentual de gordura corporal, nível de atividade física e ingestão alimentar. Resultados Foram investigados 69 obesos (índice de massa corporal ≥30kg/m2), sendo 42 do sexo feminino e com os seguintes valores médios: 34,7 (±7,2) anos; 33,5 (±2,8) kg/m2 e silhueta atual de 6,6 (±0,9). Todos estavam insatisfeitos pelo excesso de peso corporal. As categorias que se associaram à percepção da silhueta atual foram o sexo masculino, a cor de pele branca e maiores valores de índice de massa corporal quando comparados os dados referentes ao sexo feminino, a pessoas de cor da pele não branca e a menores valores de índice de massa corporal, respectivamente. Quanto à insatisfação com a imagem corporal, pessoas consideradas brancas tiveram escores mais baixos que aquelas com outras cores de pele. Conclusão Ser do sexo masculino, ter cor da pele branca e ter maior índice de massa corporal foram fatores de risco para a percepção de silhuetas corporais maiores, enquanto apenas a cor da pele não branca esteve associada à insatisfação com a imagem corporal.

Association between physical inactivity in leisure, work, commuting, and household domains and nutritional status in adults in the capital cities of Brazil / Associação entre a inatividade física nos domínios do lazer, trabalho, deslocamento e domicílio e o estado nutricional em adultos das capitais do Brasil

ABSTRACT Objective To investigate the association between different domains (leisure, work, commuting, and household) of physical activity, independent and cumulative, and excess weight and obesity in Brazilian adults. Methods This is a cross-sectional survey, conducted in 2015, through telephone interviews with a representative sample of adults from the capitals of Brazil. Physical inactivity was defined as non-participation in predefined physical activities for each assessed domain. Excess weight (Body Mass Index?25kg/m2) and obesity (Body Mass Index?30kg/m2) were determined from self-reported measurements of weight and height. A binary logistic regression was conducted after adjusting for sociodemographic factors. Results Among 54,174 subjects, physical inactivity in commuting (ORexcess weight=1.27, 95%CI=1.13,1.42 and ORobesity=1.25, 95%CI=1.06,1.47) and leisure (ORexcess weight=1.12, 95%CI=1.04,1.22 and ORobesity=1.30, 95%CI=1.17,1.45) domains were associated with nutritional status. In addition, a linear trend was observed between increasing obesity and cumulative physical inactivity of all four domains (p<0.001). Conclusion Cumulative physical inactivity, especially in the commuting and leisure domains, was associated with excess weight and obesity in adults living in the capitals of Brazil. One possible explanation of these findings is that these domains involve particularly longer duration and greater intensity of physical inactivity. Public policies concerning physical activity should prioritize actions focused in promoting physical activity on commuting and leisure-time to help prevent overweight and obesity in the Brazilian adult population.

RESUMO Objetivo Investigar a associação entre a atividade física em diferentes domínios (deslocamento, domicílio, lazer e trabalho) isolados e acumulados com a ocorrência de excesso de peso e obesidade em adultos brasileiros. Métodos Trata-se de um inquérito transversal, realizado em 2015, por meio de entrevista telefônica com uma amostra representativa de adultos das capitais do Brasil. A inatividade física foi determinada como a não participação em atividades físicas específicas para cada domínio avaliado. O excesso de peso (Índice de Massa Corporal?25kg/m2) e a obesidade (Índice de Massa Corporal ?30kg/m2) foram definidos pelo autorrelato de peso e altura. Na esta-tística, empregou-se a regressão logística binária ajustada para fatores sociodemográficos. Resultados Dentre os 54.174 sujeitos, observou-se que a inatividade física no deslocamento (OR=1,27; IC95%:1,13;1,42 e OR=1,25; IC95%:1,06;1,47) e no lazer (OR=1,12; IC95%:1,04;1,22 e OR=1,30; IC95%:1,17;1,45) estiveram associadas ao excesso de peso e à obesidade, respectivamente. Observou-se ainda uma tendência linear de aumento da obesidade à medida que se acumulam domínios com inatividade física (p<0,001). Conclusão A inatividade física acumulada em diferentes domínios, particularmente no deslocamento e no lazer, apresentou associação com o excesso de peso e obesidade em adultos residentes nas capitais do Brasil. Possivelmente, importantes características da atividade física nos referidos domínios, como a maior duração e a maior intensidade, sejam potenciais justificativas para o encontro de tais achados. Portanto, recomenda-se que políticas públicas de atividade física possam priorizar ações voltadas para os domínios do deslocamento e do lazer no combate ao excesso de peso e obesidade na população adulta brasileira.