The director of the group of investigation Emilio J. Martínez-López and the investigators Alberto Ruiz-Ariza and Manuel J De La Torre Cruz are invited as lecturers in the 1 º Seminar of Didactics of the Physical Education, Sports and Recreation organized by the School of Pedagogy of the Universidad de la Frontera in Temuco (Chile). During this educational stay and investigation stay are carried out labors of collaboration in the planning of the subject of Didactics of the Physical Education, as well as participation in diverse activities with academicians, students and exalumnos of the Career of Physical Education of the Universidad de la Frontera. Also there is established a plan of collaboration of investigation inside the area of the Physical Activity and Health specially in the relative thing to the youth obesity.