Passos dados, medidas antropométricas e atividade física em jovens: há associação?
Steps Taken, anthropometric measurements and physical activity in young subjects: is there any association?
Introdução: O sedentarismo representa um importante fator de risco para doenças crônicas subclínicas. Conhecer os métodos de avaliação dos níveis habituais de atividade física (NHAF) e sua relação com medidas antropométricas embasa a prevenção dos fatores de risco para doenças cardiovasculares. Objetivo: verificar a associação entre passos dados, variáveis antropométricas e nível de atividade física em jovens. Método: corte transversal; voluntários responderam ao questionário internacional de atividade física (IPAQ) e usaram um pedômetro 3 dias; circunferência de cintura (CC), freqüência cardíaca (FC), pressão arterial, índice de massa corporal (IMC) e índice de conicidade (IC) foram medidos e calculados. Resultados: 91 participantes, 64,8% pouco ou moderadamente ativos pelo IPAQ. A média de passos entre homens 9947±3859 foi maior que entre mulheres 6851±2553(p<0,001). Na amostra houve associação entre passos e gasto metabólico (METS/min/ semana) com r=0,29,p<0,01; passos e atividades de caminhadas (r=0,40, p<0,001) e relação inversa entre passos e FC(r=-0,33,p=0,001). Entre as mulheres observou-se associação inversa entre passos e CC(r=-0,29, p=0,02), IC(r=-0,33, p<0,01), pressão arterial sistólica (r=-0,25, p=0,04), pressão arterial diastólica (r=-0,31, p=0,01); e direta com METS/caminhada calculados pelo IPAQ (r=0,28, p=0,02). A concordância entre o NHAF (IPAQ) e passos dados obteve Kappa=0,50(p<0,001). Conclusões: entre as mulheres as variáveis de antropométricas e os passos dados estiveram relacionados. Existiu associação entre NHAF avaliado pelo IPAQ e passos dados, sendo essa relação maior em atividades que envolvem caminhadas, e entre mulheres.
Introduction: Sedentary lifestyle is an important risk factor for chronic diseases. Understand the assessment methods of levels of habitual physical activity (LHPA) and the relationship with anthropometric measurements support the prevention of risk factors for cardiovascular disease. Purpose: To establish the association among the number of steps/day, the anthropometric measurements, and LHPA in young subjects. Methods: In a cross-sectional study, 91 volunteers answered the International Physical Activity Questionnaire (IPAQ) and wore a pedometer during 3 days; waist circumference (WC), heart rate (HC), blood pressure at rest, Body Mass Index (BMI) and Conicity Index (CI) were measured and calculated. Results: 91 participants, 64,8% were classified as low and moderate LHPA according to IPAQ. The average of steps/day among men (9947±3859) was higher than among women (6851±2553) (p<0.001). In the total sample there was an association between steps and metabolic expenditure (METS/min/week) (r=0.29, p<0.01), walking activities (r=0.40, p<0.001) and a negative correlation between steps and HR (r=-0.33, p=0.001). Among the women, an inverse association was observed between steps and WC (r=-0.29, p=0.02), IC (r=-0.33, p<0.01), systolic blood pressure (r=-0.25, p=0.04), diastolic blood pressure (r=-0.31,p=0.01); and direct association with METS/walking, calculated with IPAQ (r=0.28, p=0.02). Agreement between HLPA determined by IPAQ and pedometer obtained Kappa=0.50 (p<0.001). Conclusions: Only among women, body composition variables and number of steps were related. There was an association between LHPA evaluated by IPAQ and steps/day, and this correlation was higher in walking activities, among women.
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