This article presents the results of formative experiment applied to mitigate difficulties in interpersonal relationships in preadolescent. It was a program to address psychological tracksuit consisting of 17 sessions of 90 minutes each. Following the 12 preadolescent pedagogical interventions in the experimental group became friendlier, unselfish, with confidence in other, more independent, benevolent in interpersonal relations, showing compromise and cooperation, accepting external control. The other 12 preadolescent in the control group became more aggressive, more suspicious, selfish, dependent relationships vigilant, avoid showing confrontation, accepting external control.