[Impact evaluation of educational-motivational intervention "Como Jugando" to prevent obesity in school children of Cercado de Lima: results in the first year].

The "Como jugando" intervention, in the first year of implementation, did not reduce the Z-score for BMI but improved the knowledge of nutrition, reduced the probability of poor levels of physical activity, and maintained or increased the consumption of fruits, sugar-free water, packaged juices, and sweet and savory cookies. Therefore, the "Como jugando" intervention should be better studied in order to estimate its impact on biological indicators.