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Abstract(s)
Analisar as similaridades dos níveis de atividade física (AF) e sedentarismo entre pares de amigos adolescentes, examinando a influência de variáveis biológicas, demográficas e psicossociais. Métodos: Trata-se de um estudo transversal que decorreu na primavera de 2012, cujos participantes foram adolescentes de ambos os sexos da cidade de Bragança (Portugal), 330 pares de melhores amigos (n=660), sendo 167 melhores amigos recíprocos e 163 melhores amigos não recíprocos, com idades compreendidas entre os 12 e os 21 anos (Média=15,78±1,87 anos de idade). Todos os adolescentes foram avaliados, através de questionário por auto resposta, quanto ao seu estatuto socioeconómico, níveis de AF e de sedentarismo, participação em desporto, perceção de barreiras e benefícios no exercício físico, autoperceção física, importância atribuída a componentes da autoperceção física, apoio social de outros para a AF, e perceção de preferências sedentárias do melhor amigo. Os dados foram analisados através da modelação hierárquica linear, testando o Actor-Partner Interdependence Model (APIM) de forma a analisar as semelhanças das díades de melhores amigos no que respeita aos níveis de AF e sedentarismo e a influência de diversas variáveis utilizadas no estudo como explicadores dessa semelhança nos diferentes níveis de AF e sedentarismo. Resultados: Os resultados indicaram semelhança significativa entre pares de amigos na AF global [CCI=0,23 (p=0,002)] e no tempo sedentário diário (TSD) [CCI=0,39 (p<0,001)], em pares de amigos recíprocos, assim como, no TSD em pares de amigos não recíprocos [CCI=0,21 (p=0,008)]. Algumas variáveis, sobretudo variáveis psicossociais, mostraram-se associadas à AF global em pares de amigos recíprocos e ao TSD em pares de amigos recíprocos e em não recíprocos. Conclusões: Os níveis de AF e sedentarismo são semelhantes entre pares de melhores amigos adolescentes, sendo as características psicossociais dos amigos as que mais podem mediar estes comportamentos.
To analyze the similarities of physical activity (PA) levels and sedentary lifestyle among pairs of adolescent friends, examining the influence of biological, demographic and psychosocial variables. Methods: This was a cross sectional study which took place in spring 2012, and the participants were adolescents of both sexes from Bragança (Portugal) yielding 330 pairs of best friends (n=660), wherein 167 were reciprocal best friends and 163 non-reciprocal best friends, aged 12 and 21 years (Mean=15.78±1.87 years old). All adolescents were evaluated through self response by questionnaire, with regard to their socioeconomic status, levels of PA and sedentary lifestyle, participation in sport, perceptions of barriers and benefits in physical exercise, physical self-perception, importance attributed to components of physical self-perception, social support of significant others for PA, and perception of best friend's sedentary preferences. Data were analyzed using hierarchical linear modeling, testing the Actor-Partner Interdependence Model (APIM) in order to analyze the similarities of the dyads of best friends in terms of levels of PA and sedentary lifestyle, and the influence of different variables used in the study as predictors of this similarity in the different levels of PA and sedentary lifestyle. Results: The results indicated significant similarity between pairs of friends for the global physical activity [ICC=0.23 (p =.002), and for the daily sedentary time [ICC=0.39 (p<.001)], in pairs of reciprocal friends, as well as, for the daily sedentary time in pairs of non-reciprocal friends [ICC=0.21 (p = .008)]. Some variables, particularly psychosocial variables, were associated with global PA in reciprocal pairs of friends and daily sedentary time in reciprocal and non-reciprocal pairs of friends. Conclusions: PA levels and sedentary lifestyle were similar between pairs of adolescents best friends, being psychosocial characteristics of the friends the ones which are most prone to mediate these behaviors.
To analyze the similarities of physical activity (PA) levels and sedentary lifestyle among pairs of adolescent friends, examining the influence of biological, demographic and psychosocial variables. Methods: This was a cross sectional study which took place in spring 2012, and the participants were adolescents of both sexes from Bragança (Portugal) yielding 330 pairs of best friends (n=660), wherein 167 were reciprocal best friends and 163 non-reciprocal best friends, aged 12 and 21 years (Mean=15.78±1.87 years old). All adolescents were evaluated through self response by questionnaire, with regard to their socioeconomic status, levels of PA and sedentary lifestyle, participation in sport, perceptions of barriers and benefits in physical exercise, physical self-perception, importance attributed to components of physical self-perception, social support of significant others for PA, and perception of best friend's sedentary preferences. Data were analyzed using hierarchical linear modeling, testing the Actor-Partner Interdependence Model (APIM) in order to analyze the similarities of the dyads of best friends in terms of levels of PA and sedentary lifestyle, and the influence of different variables used in the study as predictors of this similarity in the different levels of PA and sedentary lifestyle. Results: The results indicated significant similarity between pairs of friends for the global physical activity [ICC=0.23 (p =.002), and for the daily sedentary time [ICC=0.39 (p<.001)], in pairs of reciprocal friends, as well as, for the daily sedentary time in pairs of non-reciprocal friends [ICC=0.21 (p = .008)]. Some variables, particularly psychosocial variables, were associated with global PA in reciprocal pairs of friends and daily sedentary time in reciprocal and non-reciprocal pairs of friends. Conclusions: PA levels and sedentary lifestyle were similar between pairs of adolescents best friends, being psychosocial characteristics of the friends the ones which are most prone to mediate these behaviors.
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Keywords
Apoio dos pares Relações pessoais Juventude Modelação Reciprocidade