Empirical evidence regarding physical activity intervention with adolescent girls came from studies that employed different physical activity intervention programs. Results have shown that in one intervention study, conducted with girls and women, using the DAMET (Daughters and Mothers Exercising Together) Project and based on social cognitive theory (perceived self-efficacy), the subjects’ physical activity increased significantly after attending the program. In another study, the Active Winners Program was implemented, using social cognitive theory and Pender’s HPM in a community-based intervention, among students in grade five who were followed to grade seven. According to the study’s findings, neither physical activity, nor psychosocial variables, increased.