en ● Psychosocial Health مقاله اصيل پژوهشي Orginal Article <strong>Background:</strong> The aim of this study was to determine the effect of continuous care model application on body mass index (BMI) and lifestyle of middle-aged obese.<span dir="RTL"></span><br> <strong>Methods:</strong> 105 obese middle-aged were selected and assigned randomly to two groups. The data were collected using a meter, scale, and Walker health promotion lifestyle questionnaire (HPLP II). participants completed the questionnaire before undergoing the intervention, one, two, and three months after the intervention.<br> <strong>Results</strong><strong>:</strong> There was no significant difference between the experimental and control groups before the intervention considering all of the studied variables. However, a significant difference was observed between groups after the intervention in terms of lifestyle dimensions and obesity control performance.<br> <strong>Conclusion:</strong> Considering the results of current study, the continuous care model can be effective for improving the lifestyle and health of middle-aged obese. Therefore, this model is recommended as a framework to design an overweight and obesity prevention plan. Continuous care model, Body mass index, Lifestyle, Obesity 413 422 http://jrh.gmu.ac.ir/browse.php?a_code=A-10-1901-1&slc_lang=en&sid=1 Mitra Tavakolizadeh tavakolizadeh.m@gmu.ac.ird2000@yahoo.com 0919920128 100319475328460022670 No Clinical Research Development Unit, Bohlool Hospital, Gonabad University of Medical Sciences, Gonabad, Iran. Mahdi Moshki drmoshki@gmail.com‏ 0919321852 100319475328460022671 No Department of Health Education and Health Promotion, School of Health, Gonabad University of Medical Sciences, Gonabad, Iran. Mahdi Basiri Moghadam basiri1344@gmail.com 0919518877 100319475328460022672 No Department of Pediatric Nursing, Social Development and Health Promotion Research Center, School of Nursing, Gonabad University of Medical Sciences, Gonabad, Iran. Ali Delshad ali_delshad2000@yahoo.com 0919509819 100319475328460022673 Yes Department of Community Health Nursing & Nursing Management, Social Development and Health Promotion Research Center, School of Nursing, Gonabad University of Medical Sciences, Gonabad, Iran.