This study was carried out to evaluate the association between lifestyles and Body Mass Index in a group of 356 male and 226 female of university student, ages 19 to 29 years old.
23.1% of male students and 16.4% of female students showed the over weight in the classification of obesity by Japan Society for Study of Obesity.
There was no statistical significance in comparison of the body height, body weight, body mass index and body fat(%) according to age in male students. And male students showed increasing tendency of obesity index and waist-hip ratio according to age.
According to obesity category, there was significant difference in comparison of the body weight, body mass index, obesity index, waist-hip ratio and body fat(%), but except body height.
Body mass index was positively correlated to waist-hip ratio(r=0.3275, p=0.0001), fat(%)(r=0.5481, p=0.0001) and height (r=0.0201 p=0.7051) in males and waist-hip ratio(r=0.3248, p=0.001), at(%)(r=0.5703, p=0.001), age(r=0.1833, p=0.0066) and height(r=0.1295, p=0.0518) in females.
This study provides an opportunity to futher examine the relationship of sociodemographic factors and health behaviors to obesity, and to suggest the basic concept to match the obesity study to general epidemiological cohort studies for control of chronic adult diseases.

Keywords: Obesity, Body mass index, WHR, Nutrition, Physical activity