en روانشناسی ورزشی و شاخه‌های وابسته بدان Sport Psychology and its Related Branches مقاله اصیل Original Article <div style="text-align: justify;"><strong>Background.</strong> Different studies indicate a high prevalence of eating disorders in athletes. These disorders represent a serious defect in many areas of life. Eating disorders can lead to changes in consumer or intake of food and significant damage to physical health and psychosocial sports performance.<br> <strong>Objectives. </strong>The aim of the present study was examining the effects of Cognitive Behavior Therapy (CBT) on the symptoms of Bulimia Nervosa (BN) of the Athletes.<br> <strong>Methods. </strong>The research method was semi-experimental with pre-test, post-test, and three-month follow-up test. Three hundred athletes of endurance, aesthetics and weight-based pre-match sports assessed using the Eating Disorder Diagnostic Scale (EDDS) via Structured Clinical Interview (SCID) and found sixteen athletes with BN. Then they assigned randomly to control and experimental groups. The experimental groups treated by CBT using Fairburn et al. (2008) protocol (4 steps, 21 sessions during 16 weeks). Twelve weeks after the final session of CBT, all two groups assessed again by EDDS via SCID for follow up the persistence of CBT.<br> <strong>Results. </strong>The symptoms of BN is decreased significantly during CBT, but it didn&rsquo;t change in the control group (Ƞ2=0.69, f2,28=30.77, p<0.001). On the other hand, the weight of athletes with BN symptoms increased significantly during CBT, but it decreased in the control group (Ƞ2=0.5, f1.27,17.78=14.27, p=0.001).<br> <strong>Conclusion. </strong>The results of the present study confirm the effectiveness of CBT on the improvement of BN symptoms and weight management, as well as its persistence in athletes.</div> Cognitive Behavior Therapy, Eating Disorders, Bulimia Nervosa, Sports, Athletes, Weight Management 0 0 http://aassjournal.com/browse.php?a_code=A-11-1066-1&slc_lang=en&sid=1 Evrim Çakmakçı 10031947532846007570 10031947532846007570 No Coaching Education, Faculty of Sport Science, Selcuk University, Konya, Turkey Majid Mozafarizadeh mozafarizadeh.majid@gmail.com 10031947532846007571 10031947532846007571 No Department of Sport Psychology, Allameh Tabataba’i University, Tehran, Iran Seyed Morteza Tayebi tayebism@gmail.com 10031947532846007572 10031947532846007572 Yes Department of Exercise Physiology, Faculty of Sport Science, Allameh Tabataba’i University, Tehran, Iran