Investigation of the relation between self-esteem, eating disorder and BMI among active and inactive women

Poster Presentation
Paper ID : 1123-12THCONG
Oral / Poster Presentation File: 1123-12THCONG.jpg 
Department of motor behavior, faculty of physical education and sport sciences, university of Tabriz, Tabriz, Iran
The increasing tendency for slimming as an ideal body shape has been one of the reasons for the increased body dissatisfaction, especially among women. Some researchers have shown that people whose BMI is above average (overweight people), are more dissatisfied with their appearance and body. Also, researchers have noted an inverse relation between body dissatisfaction and self-esteem. Low self-esteem is a risk factor for eating disorders. In many studies it has shown that participating in physical activity and sport is a way to control BMI, increase self-esteem and decrease eating disorders. However, some studies have reported contradictory results.
The aim of this study was to investigate the relation between self-esteem, eating disorder and BMI among active and inactive adult women.
160 adult women (19-50 years old) of Tabriz were selected in two homogeneous groups (80=active group, 80=inactive group) by using random cluster sampling method. Self-esteem was measured by Rosenberg self-esteem questionnaire. Also, eating disorder was measured by EAT-26 questionnaire. Finally, BMI was measured in two groups. Data were analyzed by discriminant analyses at p≤0.05.
The results of discriminant analysis test showed that there were significant statistical differences in self-esteem, eating attitude and all of its subscales, but not in BMI (0.0001≤ P ≤0.28). The inactive group had higher scores in eating attitude and its subscales and lower scores in self-esteem. Also, an eigenvalue (0.656) and Wilk’s Lambda showed that a canonical discriminant function had identified, that could explain 40% of variances between groups. Eating habits had the most and self-esteem had the least effect. Finally, this function had correctly predicted the active group with 85% and the inactive group with 76.2%.
The results showed that participating in sport and physical activity could prevent or decrease eating disorders. The positive effects of physical activity on mental health may be the reason for this findings. Also, the results showed the positive effects of physical activity on self-esteem that is in line with physical self-perception hierarchy model of Fox. In the other words, physical activity improves physical self-perception, and self-worth, respectively. Finally, these structures improve self-esteem.