The main goal of the current study is to identify the causal relationship between physical and/or mental health and leisure sports activity of college students according to BMI classification of college students. For this goal, the study conducted nationwide surveys over 1,260 male and female college students via online. The main results of this study are as follows. First, male students show higher performances than female students in every variable except the variable that captures the appearance-oriented attitude. The other variables are leisure sports participation, positive appearance evaluation, body satisfaction, and life satisfaction. Second, for the overweight group students, they attended leisure sports activities more frequently than low-weight group students. Also, body satisfaction was high in the order of low-, normal-, and overweight group students. Third, for low-weight group students, there was no certain relationship between life satisfaction and the effects of leisure sports participation. On the other hand, positive appearance evaluation increases life satisfaction. Fourth, for normal-weight group students, leisure sports participation is positively effective for body and life satisfactions. Fifth, the fourth result was also valid for overweight group students. That is, they evaluated their appearance more positively as they attended leisure sports activity more frequently. Furthermore, this relationship was stronger than normal-weight group students, and this positive appearance was led to high body and life satisfactions.