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To the Editor.—Dr Andersen and colleagues¹ address 2 important questions—whether ethnic groups are determinants of the level of physical activity and whether physical activity and television watching are determinants of body composition.

Limited data are available concerning physical activity and television watching in children and adolescents of countries other than the United States, and we think that, as in other cases, it is important to analyze results of this issue in other populations. Seven years ago in Zaragoza, Spain, we carried out a representative cross-sectional survey of adolescents (537 boys and 541 girls) aged 13 and 14 years.^2-4

In our survey of a homogeneous white population, we have observed very similar results of the level of physical activity among ethnic groups as those in the study by Anderson et al taking into account socioeconomic status. We found that boys and girls of the lowest socioeconomic status were more sedentary . . . [Full Text of this Article]

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RELATED ARTICLE

Relationship of Physical Activity and Television Watching With Body Weight and Level of Fatness Among Children: Results From the Third National Health and Nutrition Examination Survey
Ross E. Andersen, Carlos J. Crespo, Susan J. Bartlett, Lawrence J. Cheskin, and Michael Pratt
JAMA. 1998;279(12):938-942.
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