The aim of this study was to determine the impact of mobile phone short messages on promotion of physical activity is based on meta-theoretical model.The population consisted of 120 students of the University of Medical Sciences. In the beginning, for sampling the Schools, four schools will be selected. the number of students chosen randomly. At this point, the lack of contact Students intervention and control and the risk they affect each other, groups of students from the School of Public Health and Group Control of other college students are selected. Students in terms of educational level, education level, age and … are matched group. Volume 60 patients were in each group. Lifestyle education SMS messages are sent via mobile phone. For this purpose, a social group whose members are composed Telegram The intervention group and researchers, and educational messages designed for one month during the initial assessment and Meta-theoretical model will be sent to the members and the members also interact with researchers and with your teammates they do. Three months after the second evaluation and intervention before and after the study, in the analysis and Educational content is placed in the control group. (Criteria includes: being in pre-practice transtheoretical model (pre-contemplation, contemplation and preparation), Consent to participation in educational programs and Exclusion criteria included: the lack of consent to continue participating in the intervention, academic problems and physical problems, Emotional or mental participants in a study.)The primary outcome: the promotion of physical activity students of the secondary outcome Promotion of change, change processes, efficacy and decision balance.