Factors associated with compliance with physical activity recommendations among adolescents in Huesca

Schools have been identified as environments of choice for physical activity promotion. This study examines factors associated with compliance with objectively assessed physical activity recommendations for early adolescents taking part in "Sigue la Huella", a school-based intervention guided by a social ecological framework and Self-Determination Theory (Deci and Ryan, 2002). A total of 200 students (108 boys) aged 12-13 years (M = 12.16; SD = ± 0.51), wore accelerometers during a seven-day period and completed a questionnaire. Participants were considered compliant to the recommendations if their moderate to vigorous physical activity, averaged over seven days, was ≥ 60 minutes a day. As a result 57.4% of boys and 9.9% of girls met recommendations. In a multilevel logistic regression model, compliance was higher among boys and students attending private schools, and lower for obese students. Compliance was also associated with higher perceptions of physical competence, higher perceptions of autonomy in physical education, greater importance attached to physical education and less sedentary time. In conclusion, assessed objectively, gender differences in compliance with physical activity recommendations were greater than expected. Self-Determination Theory emerged as a useful framework to identify motivational factors that can be addressed in school-based physical activity interventions and programs for early adolescents.