Please select the eligibility criteria that correspond to the clinical trial below.
Title: ACTIVITAL: Health Promotion Intervention in Ecuadorian Adolescents to Promote Healthy Dietary and Physical Activity Patterns.
Brief Summary: Worldwide, low-income and middle-income countries are undergoing rapid demographic and nutritional changes. Populations tend to move from their traditional food habits towards dietary patterns characterized by a more energy-dense diet, while urbanization and technology (work, transport) play a role in the reduction of their physical activity. This shift towards energy-dense diets and lower levels of physical activity are key determinants of chronic diseases. Nowadays, childhood overweight and obesity are becoming a major threat to public health all in low-income and middle-income countries. Clearly, not properly addressing this health problem will only aggravate the already enormous impact of chronic diseases on the social and economic development of these countries. This study aims to develop a culturally relevant school-based prevention intervention among Ecuadorian adolescents (11-13 years old) in Cuenca. The intervention will target behavioural nutrition and physical activity. Intervention strategies will be developed based on theoretical behavioural change models integrated in two complementary frameworks, i.e. (i) the Intervention Mapping protocol, and (ii) the Comprehensive Participatory Planning and Evaluation protocol.

The study includes two phases:

1. A formative research, which will be conducted in order to understand the causality of the school environment and unhealthy eating and low physical activity levels in school-going adolescents, aged 12-13 years old.
2. A paired, cluster-randomized controlled trial including 1400 adolescents (12-13 years old) from 10 pairs of schools (i.e. clusters). Within each pair of clusters, one cluster will be randomly assigned to the intervention and the other to the control group.


Options:
A: Inclusion Criteria:

* 11-13 years old
* school-going
* willing to participate

Exclusion Criteria:

* pregnant
* severe medical/physical disorder
B: Inclusion Criteria:

* Schools must have at least one full classrooms for the 3rd year of preschool.
* The approval of boards of governors will be necessary to participate in the intervention and in the measurements at the beginning and end of academic year.
* Children's parents or legal representatives will sign an informed consent to participate.
* Children's parents will be invited to collaborate by filling in questionnaires with regard to family leisure habits, sleeping, eating and getting around town.

Exclusion Criteria:

* Children with severe Spanish language learning difficulties.
* Children with serious physical or mental disorders identified by parents or teachers that would impede participation in the programme's activities
* Children diagnoses of chronic disorders, such as heart disease, diabetes or asthma, which in the opinion of their paediatricians would prevent their participation in the programme's activities (MOVI-da10!).
C: Inclusion Criteria:

* Elementary school students in K-3 grade in the Bronx, New York

Exclusion Criteria:

* Inability to participate in basic exercise program
* Students whose parents signed the opt-out letter
D: Inclusion Criteria:

* Children in grade 6 or grade 7, 11-14 years old and their parents, enrolled in the schools participating in the study

Exclusion Criteria:

* Children younger than 11 years or older than 14 years, not enrolled in the schools participating in the study

Answer: A