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Salud pública Méx ; 54(5): 463-469, sept.-oct. 2012. graf, tab
Article in English | LILACS | ID: lil-649918

ABSTRACT

OBJECTIVE: To examine the independent relation of physical activity (PA) and cardiorespiratory fitness (fitness) with measures of obesity in Mexican children. MATERIALS AND METHODS: Children (N=193) in 5th and 6th grade from Guadalajara participated. Body mass index (BMI), sum of skinfolds (SS) and waist circumference (WC) were measured. PA was measured over four days using pedometry and fitness was measured using the 20 meter shuttle-run test. RESULTS: Fitness and PA were negatively related to the obesity measures in boys and girls (r=-0.57 to -0.64 and r=-0.18 to -0.23 respectively). Age adjusted significant differences in WC, BMI, and SS were observed between the lowest and highest fitness tertiles for boys and girls (p<.01). Age, gender, and PA adjusted fitness explained 23 to 34% of the variance on WC (r²=0.23, p<.01), BMI (r²=0.23, p<.01), and SS (r²=0.34, p<.01). CONCLUSION: Fitness is a stronger correlate and better predictor of obesity than PA in this sample.


OBJETIVO: Examinar la relación independiente entre actividad física (AF) y acondicionamiento cardiorrespiratorio (fitness) con obesidad en niños mexicanos. MATERIAL Y MÉTODOS: Participaron 193 niños de Guadalajara en 5to y 6to grado de primaria. Se midieron índice de masa corporal (IMC), suma de pliegues cutáneos (SP) y circunferencia de cintura (CC). La AF se midió con podometría durante cuatro días y acondicionamiento usando la prueba de 20 metros shuttle-run. RESULTADOS: Acondicionamiento y AF estuvieron negativamente relacionados con obesidad en niños y niñas (r=-0.57 a -0.64 y r=-0.18 a -0.23 respectivamente). Ajustando por edad, se observaron diferencias significativas en CC, IMC y SP entre los terciles de acondicionamiento bajo y alto en niños y niñas (p<.01). Ajustando por edad, género y AF, el acondicionamiento explicó de 23 a 34% de la varianza en CC (r²=0.23, p<.01), IMC (r²=0.23, p<.01) y SP (r²=0.34, p<.01). CONCLUSIÓN: El acondicionamiento es un mejor predictor de obesidad que la AF en esta muestra.


Subject(s)
Child , Female , Humans , Male , Motor Activity , Obesity/epidemiology , Physical Fitness , Body Mass Index , Cross-Sectional Studies , Exercise Test , Mexico/epidemiology , Obesity/prevention & control , Prevalence , Skinfold Thickness , Socioeconomic Factors , Waist Circumference
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