In this study, before the intervention, there was no significant difference between the mean score of women on osteoporosis prevention behaviors and both groups had low performance in maintaining proper diet and walking. Immediately after and six months after the intervention, the mean performance score of the women in the intervention group significantly increased compared to controls. This shows the positive effects of the education on women's performance. Hazavehei et al. also reported an increase in walking and calcium intake in the intervention group after the intervention19. In a study by Wafaa Hassan et al. on 100 female students using the HBM, the students' performance on calcium intake and exercise after the intervention showed a significant increase compared to before15. This is consistent with previous study on the effects of physical activity education in prevention of osteoporosis among women 40 to 65 yr old based on trans-theoretical model3.