[Physical fitness of school age children post-implementation of an educational intervention to prevent childhood obesity in Morelos, Mexico.].

Objective: To compare the physical fitness of children from eight elementary schools in Morelos, México after the imple- mentation of an intervention to prevent childhood obesity.

Materials And Methods: 214 children were randomly selected (111 - intervention community and 103 - control community). Physical fitness was evaluated by the 6 minutes walking test and the 50 meters speed test, as well as the number of steps/day.