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01.12.2015 | Study protocol | Ausgabe 1/2015 Open Access

BMC Public Health 1/2015

KIDS OUT! Protocol of a brief school-based intervention to promote physical activity and to reduce screen time in a sub-cohort of Finnish eighth graders

BMC Public Health > Ausgabe 1/2015
Anne-Mari Jussila, Tommi Vasankari, Olavi Paronen, Harri Sievänen, Kari Tokola, Henri Vähä-Ypyä, Anna Broberg, Minna Aittasalo
Wichtige Hinweise

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

A-MJ: Planning and implementation of the study, data collection and main author in drafting the manuscript. TV: Planning of the study, participation in drafting the manuscript. OP: Planning of the study, participation in drafting the manuscript. HS: Planning of the study and data collection, participation in drafting the manuscript. KT: Statistical analyzes, participation in drafting the manuscript. HV-Y: Planning the accelerometer data collection, participation in drafting the manuscript. AB: SoftGIS questionnaire and feedback views, participation in drafting the manuscript. MA: Principal investigator, planning and implementation of the study, data collection, supervision and participation in drafting the manuscript. All authors read and approved the final manuscript.



Adolescents’ physical activity (PA) is decreasing and sedentary behavior (SB) increasing alarmingly. Insufficient PA and excessive SB are both related to various health risks indicating that interventions to promote adolescents’ PA and to reduce their SB are needed. Schools have a great potential to reach most adolescents, and in Finland health education (HE) as stand-alone subject provides an excellent platform for health promotion. This paper describes the protocol and evaluation (RE-AIM) of an intervention developed for three HE lessons to increase PA and reduce SB during leisure among 8th graders.


All city-owned secondary schools in Tampere (n = 14) were invited to the study and were randomized in pairs to intervention (n = 7) and comparison group (n = 7). A specific content on PA and SB based on Health Action Process Approach model was integrated into routinely scheduled three HE lessons with the help of educational material: SoftGIS-questionnaire followed by feedback views on adolescents’ current PA and SB, FeetEnergy-homework leaflet for adolescents, FeetEnergy-video in YouTube, FeetEnergy-poster for classroom and FeetEnergy-leaflet for parents. In the comparison group standard HE lessons were held. The primary indicators of Effectiveness are changes in PA and SB and in their psychosocial factors as well as in parental interference with PA and SB. The measurement points are baseline, 4 weeks after the intervention and 7 months from baseline, the last indicating also the measurement point for individual level Maintenance. The measures are accelerometers, 7-day activity diaries and questionnaires. The evaluation of Reach, Adoption and Implementation is based on the data collected during the intervention. Maintenance at organizational level is assessed two years after the intervention with a questionnaire to the HE teachers. The intervention was implemented in 2012 and the last measurements to assess organizational Maintenance were conducted in the end of 2014. A detailed description of the protocol and evaluation is provided to enable replication and better understanding of the findings, which will be reported in 2015.


The findings will add our current knowledge about the feasibility and effectiveness of integrating simple structured elements into the HE lessons to increase PA and reduce SB in adolescents.

Trial registration

NCT01633918 (June 27th, 2012)
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