Background and aims: The common potential risk factors contributing to the development of eating disorder and exercise dependence during early adulthood are still unclear. The present study aimed to examine the role of BMI, body image inflexibility, and anxiety to these two behavioral disorders symptoms in a sample of college students. Methods: 878 habitual exer- cisers (M age = 20.09 years, SD = 1.76 years) in universities participated in this study. Par- ticipants filled out demographic information, exercise behavior, questionnaire for exercise dependence (EDS-R), eating disorder (EDE-QS), body image inflexibility (BI-AAQ), and generalized anxiety disorder (GAD-7). Results: After controlling for age, gender and major, lower BMI was linked to more exercise dependence symptoms but not significant (β=-0.04, p=0.26), while greater BMI was significantly associated with a higher risk of developing eat- ing disorder (β=-0.08, p<0.001). Moreover, higher body image inflexibility is significantly positive contributed to sever exercise dependence (β=0.26, p<0.001) as well as abnormal eating attitudes and behaviors (β=0.74, p<0.001). Furthermore, generalized anxiety is a sig- nificant contributor to exercise dependence symptoms (β=0.14, p<0.001) but not eating dis- order symptoms (β=0.02, p=0.43). Discussion and Conclusions: Body image inflexibility as a common contributor to developing exercise dependence and eating disorders, suggests that the prevention and treatment of these two behavioral disorders should involve the improve- ment of psychological flexibility. In addition, the individual with higher BMI is more vulner- able for developing eating disorder, while those who have the sever anxiety symptoms should be given more attention to screen for exercise dependence.