RESUMEN
This study was conducted to determine the impact of education using the Health Belief Model on preventing osteoporosis among female students. This interventional study [quasi-experimental] was performed on 45 female students aged 15-16 years old who resided in a town near Tehran. The females participated in a three-week educational programme based on the Health Belief Model. The data collection instrument was a validated and reliable questionnaire in five sections: demographics, knowledge, Health Belief Model constructs, physical activity and consumption of foods containing calcium. The mean scores of students knowledge were significantly different before and after the educational intervention [P < 0.05].The mean scores of some Health Belief Model structures changed significantly after the intervention [P < 0.05]. Also post-intervention, physical activity increased [P = 0.041] but calcium intake did not. The use of an educational intervention on osteoporosis seems to improve knowledge and health beliefs and may positively impact physical activity-related behaviour