THE EFFECTIVENESS OF A SCHOOL-BASED HEALTH EDUCATION INTERVENTION IN CHANGING SCREEN-BASED AND PHYSICAL ACTIVITIES IN YOUNG ADOLESCENTS/Ucinkovitost zdravstveno-obrazovne intervencije u skolskom okruzenju u mijenjanju fizickih aktivnosti mladih adolescenata i aktivnosti koje obavljaju pred zaslonima

This study examines the extent to which a comprehensive, school--based, health-education programme, based on lectures and active student participation in discussions and related project activities, can produce desirable changes in adolescents' behaviour. A quasi-experimental design, with pre- and post-intervention testing, was used in a group of adolescents (N = 858). Our results show that the conducted programme had modest effects. There was no difference between the pre- and post-intervention reports of time spent on screen-based activities and physical exercise, and the time spent doing physical activities was not correlated with the time they spent on sedentary activities. In this paper, we discuss various possible reasons for the ineffectiveness of such programmes in producing desired behavioural changes in young adolescents. Keywords: health education programmes, children and young adolescents, screen-based activities, physical activities U radu se razmatra u kojoj mjeri sveobuhvatni program zdravstvenog odgoja koji se provodi u skolskom okruzenju, a koji se oslanja na predavanja, ucenicke rasprave i povezane projektne aktivnosti, moze pridonijeti zeljenim promjenama u ponasanju mladih. Rezultati istrazivanja (primjenom kvazieksperimentalnog istrazivackog nacrta s testiranjem prije i nakon provodenja programa na uzorku od 858 adolescenata) pokazuju da ovakvi programi zdravstvenog odgoja imaju skroman ucinak. Nisu utvrdene statisticki znacajne razlike u kolicini vremena koju su adolescenti posvecivali aktivnostima sto se provode na zaslonu u odnosu na fizicke aktivnosti prije i nakon sudjelovanja u programu, niti je vrijeme provedeno u fizickim aktivnostima adolescenata bilo povezano s kolicinom vremena utrosenog na sjedilacke aktivnosti. U radu su pruzena moguca objasnjenja zbog cega su ovakvi zdravstveni programi, koji se temelje primarno na predavanjima, raspravama i savjetima, neucinkoviti u mijenjaju ponasanja adolescenata. Kljucne rijeci: programi zdravstvenog odgoja, djeca i mladi adolescenti, aktivnosti pred zaslonom, fizicke aktivnosti