Table 4. Intervention components and strategies.

Intervention Components / Strategies / Short Explanation of Strategies
Tutorial Action / Tutorial Action Guide / Guide consisting of 14 working sessions to inform teachers and provide orientation to schools regarding PA promotion for adolescents.
Stickers and magnets C30-D30 / PA promotion curricular materials given to participants to raise awareness in school and at home.
Fun Recesses / Organizing and involving students in the development of fun physical activities during recesses.
Interschool Suitcases / Design of suitcases with sport equipment to share with students from other schools.
Suitcase Exchange / After school activities in public facilities to exchange the suitcases with other schools and get to know places in the city to practice PA.
School Training Project / Project that allowed to provide further information to teachers to think about PA promotion as the responsibility of everyone in school.
School Physical Education / Teaching Style Improvement Program / Training to improve teachers’ capacity to motivate students and influence their behavior. The training was based on the tenets of self-determination theory to foster student autonomy, perceived competence and feelings of relatedness to others.
Get Active Project / Interdisciplinary teaching unit aiming to give students autonomy to develop an individual PA program based on one or several activities practiced in class that comply with the characteristics of health-enhancing PA.
Information Dissemination / Regular Meetings / Regular meetings with families, teachers, administrators, and intervention core group to share the results of the intervention and the evolution of PA levels.
Reports and Letters / Reports for school administrators and letters to families to disseminate the results of the intervention.
E-Dissemination / Dissemination activities using online tools and resources (e.g., link with school website, multimedia screen at the entrance of the schools with images and messages about the intervention, school blog for the intervention).
Publications in Local Media / Weekly communications in local media sharing some intervention strategies and results as a way to connect the school and community contexts.
Participation in Institutional Programs and Special Events / Participation in Institutional Programs / Participation in institutional programs and activities sponsored by the Health Promotion Projects Network of Aragon and the Health Promoting Schools Network of Aragon, as a way of fostering multidisciplinary work and sharing experiences.
Participation in Special Events / Participation in PA-related events in the community as a way of connecting the schools with community organizations and programs involved in the promotion of PA.

Table 5. Measurement schedule by cohort.

Cohort / Timepoint 1
Variable / Timepoint 2
Variable / Timepoint 3
Variable / Timepoint 4
Variable
Cohort 1 / -Moderate-to-vigorous physical activity
-Sedentary time
-Weight status (BMI)
-Participation in organized physical activities out of school
-Socioeconomic status
-Motivational variables / -Moderate-to-vigorous physical activity.
-Sedentary time / -Moderate-to-vigorous physical activity
-Sedentary time
-Participation in organized physical activities out of school
-Socioeconomic status
-Motivational variables / -Moderate-to-vigorous physical activity
-Sedentary time
-Participation in organized physical activities out of school
-Socioeconomic status
-Motivational variables
Cohort 2 / -Moderate-to-vigorous physical activity
-Sedentary time
-Weight status (BMI)
-Participation in organized physical activities out of school
-Socioeconomic status
-Motivational variables / -Moderate-to-vigorous physical activity
-Sedentary time
-Participation in organized physical activities out of school
-Socioeconomic status
-Motivational variables / -Moderate-to-vigorous physical activity
-Sedentary time
-Participation in organized physical activities out of school
-Socioeconomic status
-Motivational variables
Cohort 3 / -Moderate-to-vigorous physical activity
-Sedentary time
-Weight status (BMI)
-Participation in organized physical activities out of school
-Socioeconomic status
-Motivational variables / -Moderate-to-vigorous physical activity
-Sedentary time
-Participation in organized physical activities out of school
-Socioeconomic status
-Motivational variables

Table 6. Number of participants meeting inclusion criteria by cohort and group across measurement occasions.

Cohort / Group / Time
Time 1
N (% girls) / Time 2
N (% girls) / Time 3
N (% girls) / Time 4
N (% girls)
1 / Experimental / 104 (39.4%) / 86 (46.5%) / 98 (40.8%) / 86 (45.3%)
Control / 100 (53%) / 88 (58%) / 76 (53.9%) / 71 (56.3%)
2 / Experimental / 96 (39.6%) / 78 (43.6%) / 73 (37%)
Control / 80 (46.3%) / 52 (53.8%) / 60 (56.7%)
3 / Experimental / 102 (47.1%) / 94 (47.9%)
Control / 71 (62%) / 43 (60.5 %)