Epidemiological studies show that during the last two decades childhood obesity has increased dramatically to become, one of the major public health concerns. Dietary habits, lack of physical activity and the degree of obesity rates and worsen over the years making overweight children overweight adults.determine the influence of various modifiable factors (dietary habits, physical activity, inactivity and sleep) on the weight status of a group of school children.An observational retrospective cross section of 129 students of Madrid between 6 and 12 years with anthropometric data (weight, height and waist circumference), dietary (Kidmed), physical activity was performed (IPAQ adapted), inactivity and sleep.The most significant result was the excess weight of the children (28.1%), although these results are not statistically significant on any of the factors studied. Physical activity factor and time spent in sedentary activities by gender, in both cases lower values in girls than in boys with statistically significant differences (p <0.05) were observed.With the analyze of data, the factors studied versus weight status, no significant differences were found between the groups established by what has not been possible to define the influence thereof on weight status. We suggest the possible influence of genetic and environmental factors on the sample, beyond the established habits.